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Tuesday, September 30, 2014
LPTH Press Release: LightPath Technologies Announces Order with HDOEI for New Application
Monday, September 29, 2014
Seminar: "A Taxonomy of the Magneto-Optical Responses of Cyclic Plasmon-Supporting Metal Oligomers" by David J. Masiello 11.6.14/ 11:00am-12:00pm/ CREOL 103
Seminar: "A Taxonomy of the Magneto-Optical
Responses of Cyclic Plasmon-Supporting Metal Oligomers" by David J.
Masiello
Thursday, November 6, 2014 11:00 AM to 12:00 PM
CREOL Room 103
CREOL Room 103
David J. Masiello, Assistant Professor
Department of Chemistry, University of Washington
Abstract:
The optical-frequency magnetic and electric properties of
cyclic plasmon-supporting metal nanoparticle oligomers are explored through a
combination of scanning transmission electron microscopy (STEM)/electron
energy-loss spectroscopy (EELS) simulation and first-principles theory. A
tight-binding type model is introduced to explore the rich hybridization
physics in these plasmonic systems and tested with full-wave numerical
electrodynamics simulations of the STEM electron probe. Building from a
microscopic electric model, connection is made at the macroscopic level between
the hybridization of localized magnetic moments into delocalized magnetic
plasmons of controllable magnetic order and the mixing of atomic p_z orbitals
into delocalized pi molecular orbitals of varying nodal structure spanning the
molecule. It is found that the STEM electrons are uniquely capable of exciting
all of the different hybridized eigenmodes of the nanoparticle
assembly---including multipolar closed-loop ferromagnetic and antiferromagnetic
plasmons, giant electric dipole resonances, and radial breathing modes---by
raster scanning the beam to the appropriate position. Comparison to plane-wave
light scattering and cathodoluminescence (CL) spectroscopy is made. The
presented work provides a unified understanding of the complete plasmon
eigenstructure of such oligomer systems as well as of the excitation conditions
necessary to probe each mode.
Biography:
David J. Masiello completed a B.S. degree in mathematics
from the University of Florida in 1999. He then joined the University of
Florida's Quantum Theory Project as a graduate student in chemical physics,
where, in 2004, he received the Ph.D. degree working under the tutelage of
Professor Yngve Öhrn. His dissertation work explored a nonperturbative
treatment of the interaction between molecules and the electromagnetic field,
accounting for the redistribution of energy not only between different internal
molecular degrees of freedom but also for its liberation to the dynamical
electromagnetic field. He then took two postdoctoral positions, one with Prof.
William P. Reinhardt at the University of Washington (2004-2006) and the second
with Professor George C. Schatz at Northwestern University (2006-2009).
Subsequently, David was hired back to the University of Washington in 2010
where he is now an assistant professor in theoretical chemistry.
Currently, Professor Masiello's research focuses on the theoretical
understanding of a variety of nanoscale light-matter interactions involving the
excitation of surface plasmon resonances. Examples include electron energy-loss
spectroscopy, cathodoluminescence, thermo-plasmonics, plasmon-enhanced
catalysis, and plasmon-enhanced linear and nonlinear molecular optical
phenomena. As of Spring 2014, David is also a faculty member by courtesy
in the Physics and Applied Mathematics departments at UW.
For more information:
Dr. Leonid Glebov
407-823-6983
Thursday, September 25, 2014
TOMORROW! Seminar: "Recent advances in LIBS instrumentation: Application in quantification and elemental imaging" by Vincent Motto-Ros 9.26.14/ 11:00am-12:00pm/ CREOL Rm 103
Seminar: "Recent advances in LIBS instrumentation:
Application in quantification and elemental imaging" by Vincent Motto-Ros
Friday, September 26, 2014 11:00 AM to 12:00 PM
CREOL Room 103
CREOL Room 103
Abstract
Laser-Induced Breakdown Spectroscopy (LIBS) is recognized as
a promising technique which enables elemental analysis of any type of material.
It is extremely versatile with high potential in term of applications, offering
standoff analysis capability, requiring only simple sample preparation, and
providing fast and real-time analysis. However, improving the repeatability and
the reproducibility of LIBS measurements is still the challenging issue faced
by the technique to fit the requirements of precise and accurate quantitative analysis.
In the first part of this presentation, I will describe a
new generation of LIBS instrument developed in our institute. The basic
instrumental concept is to assist, either manually or automatically, the
optical detection fiber by a real-time imaging of the plasma. This tends to
improve greatly the stability of LIBS measurement in short as well in long
terms [1], allowing unprecedented level of performances in elemental
quantification (c.f. fig. 1a.). In the second part, some of our recent results will
be presented in the frame of elemental imaging of biological tissue. We will
show different examples of elemental images, sections of tumors and murine
kidneys, with an investigation focused on the renal clearance of theranostic
gadolinium-based nanoparticles (Fig. 1b.). The efficiency of LIBS imaging
allows elements being mapped and quantified in tissues without any labeling and
with an instrumentation fully compatible with standard optical microscope
systems, offering a valuable tools in the fields of nanotechnology, biology, as
well as medicine. [2].
Fig. 1. a) Example of calibration curve typically
obtained with our LIBS setup. b) Elemental imaging principle and example of
images obtained for a section of murine kidneys with 20 µm space resolution.
[1] Motto-Ros, V et al. Precise
alignment of the collection fiber assisted by real-time plasma imaging in laser-induced
breakdown spectroscopy. Spectrochim. Acta B 92, 60-69 (2014).
[2] Sancey, L. et al. Laser
spectrometry for multi-elemental imaging of biological tissues, Sc. Rep. 4,
6065 (2014).
Biography:
Associated Professor, Institut Lumière Matière, Université
Claude Bernard Lyon 1, Domaine Scientifique de La Doua, Bâtiment Kastler, 69622
Villeurbanne, France
Vincent Motto-Ros graduated with a M.S. in "Laser and
Spectroscopy" in the University of Lyon (France) in 2002 and continued to
complete his Ph.D. in the 'Laboratoire de Spectrométrie Ionique et Moléculaire'
(Lasim, Lyon) working on "high-precision and high-sensitive spectroscopy
of gaseous molecular species (O2, H2O, NO2) using high finesse cavities pumped
by CW laser diode" under the direction of Pr. Patrick Rairoux. He starts
his research on LIBS in 2007 with a post-Doc position in the Canadian Space
Agency for which he demonstrated the potential of artificial neural network
(ANN) in LIBS data processing for material identification and quantitative
measurements of elements of planetological interest. He was recruited in 2008
by the Lyon 1 University as Associated Professor in the Jin Yu’s team (LASIM,
called now Light and Matter Institute). He developed advanced experimental
setups for fundamental research as well as applications related to
laser-induced plasma. His panel covers the fundamentals of laser-induced
plasmas, the application of laser spectroscopies such as LIBS, Fluorescence and
Raman, as fundamental diagnostics as well as sensing techniques for industrial,
environmental, geological and biomedical applications.
For additional information:
Dr. Matthieu Baudelet
407-823-6910
TOMORROW! SPIE Student Chapter Faculty Talk Series: “Perspectives on a Research Career – from Industrial Research at Bell Communications Research to Academia” by Dr. Peter J. Delfyett 9.26.14/ 12:30-1:30pm/ CREOL Rm 103
SPIE Student Chapter Faculty Talk Series: “Perspectives
on a Research Career – from Industrial Research at Bell Communications Research
to Academia” by Dr. Peter J. Delfyett
Friday, September 26, 2014 12:30 PM to 1:30 PM
CREOL Room 103
CREOL Room 103
Abstract:
This presentation will be a personal perspective on how one
can manage their research career, whether it is in a world class industrial
research lab or in a research intensive university. I will try to highlight the
inherent challenges and rewards one might encounter on either path. I
will also discuss the transition from graduate school to the professional
career, as well as suggest possible strategies to help in navigating the
difficult times.
Biography:
Peter J. Delfyett received the B.E.(E.E.) degree from The
City College of New York in 1981, the M.S. degree in EE from The University of
Rochester in 1983, the M. Phil and Ph.D. degrees from The Graduate
School & University Center of the City University of New York in 1987 and
1988, respectively. His Ph.D. thesis was focused on developing a real
time ultrafast spectroscopic probe to study molecular and phonon dynamics in
condensed matter using optical phase conjugation techniques.
After obtaining the Ph.D. degree, he joined Bell
Communication Research as a Member of the Technical Staff, where he
concentrated his efforts towards generating ultrafast high power optical pulses
from semiconductor diode lasers, for applications in applied photonic
networks. Some of his technical accomplishments were the development of
the world’s fastest, most powerful modelocked semiconductor laser diode, the
demonstration of an optically distributed clocking network for high speed
digital switches and supercomputer applications, and the first observation of
the optical nonlinearity induced by the cooling of highly excited electron-hole
pairs in semiconductor optical amplifiers. While at Bellcore, Dr.
Delfyett received numerous awards for his technical achievements in these
areas, including the Bellcore Synergy Award and the Bellcore Award of
Appreciation.
Dr. Delfyett joined the faculty at the College of Optics
& Photonics and the Center for Research and Education in Optics and Lasers
(CREOL) at the University of Central Florida in 1993, and currently holds the
positions of University of Central Florida Trustee Chair Professor of Optics,
ECE & Physics.
Dr. Delfyett served as the Editor-in-Chief of the IEEE
Journal of Selected Topics in Quantum Electronics (2001-2006), and served on
the Board of Directors of the Optical Society of America. He served as an
Associate Editor of IEEE Photonics Technology Letters, was Executive Editor of
IEEE LEOS Newsletter (1995-2000) and sits on the Presidential Science Advisory
Council of the Orlando Science Center. He is a Fellow of the Optical
Society of America, Fellow of IEEE Photonics Society, Fellow of the American
Physical Society, and a Fellow of the National Academy of Inventors, was a
member of the Board of Governors of IEEE-LEOS (2000-2002), and is also a member
of Tau Beta Pi, Eta Kappa Nu, and Sigma Xi, and SPIE. Dr. Delfyett has been
awarded the 1992 YMCA New Jersey Black Achievement Award, the 1993 National
Black Engineer of the Year Award – Most Promising Engineer, the University
Distinguished Research Award ’99, and highlighted in Design News’ “Engineering
Achievement Awards”. In addition, Dr. Delfyett has been awarded the
National Science Foundation’s Presidential Faculty Fellow Early Career Award
for Scientists and Engineers, which is awarded to the Nation’s top 20 young
scientists. Dr. Delfyett has published over 700 articles in refereed
journals and conference proceedings, has been awarded 36 United States Patents,
and has been highlighted on ‘C-SPAN’, “mainstreekweek.com” and in
“Career Encounters”, a PBS Special on technical careers in the optics and
photonics field. Dr. Delfyett was awarded the 1999 University
Distinguished Researcher of the Year Award, the 2000 Black Engineer of the Year
Award – Outstanding Alumnus Achievement, and the 2000 Excellence in Graduate
Teaching Award. He was awarded the University of Central Florida’s 2001
Pegasus Professor Award which is the highest honor awarded by the
University. He is also a Founding Member in NSF’s Scientists and
Engineers in the School Program, which is a program to teach 8th graders
about the benefits of science, engineering and technology in society. In
2003, Dr. Delfyett received the Technology Innovation Awardfrom the Orlando
Economic Development Commission. He was selected as one of the “50 Most
Important Blacks in Research Science in 2004” and as a “Science Trailblazer in 2005
and 2006” by Career Communications Group and Science Spectrum Magazine.
He was awarded the APS Edward Bouchet Award for his significant scientific
contributions in the area of ultrafast optical device physics and semiconductor
diode based ultrafast lasers, and for his exemplary and continuing efforts in
the career development of underrepresented minorities in science and
engineering. Dr. Delfyett has also endeavored to transfer technology to
the private sector, and helped to found “Raydiance, Inc.” which is a spin-off
company developing high power, ultrafast laser systems, based on Dr. Delfyett’s
research, for applications in medicine, defense, material processing, biotech
and other key technological markets. Dr. Delfyett was also elected
to serve 2 terms as President of the National Society of Black Physicists
(2008-2012). Most recently, he was awarded the 2014 Medalist from the
Florida Academy of Sciences for his outstanding contributions scientific
research, and to the stimulation of interest and promotion of scientific
knowledge.
For additional information
Javed Rouf Talukder
President of SPIE student chapter
Friday, September 19, 2014
SPIE Student Chapter Faculty Talk Series: “Perspectives on a Research Career – from Industrial Research at Bell Communications Research to Academia” by Dr. Peter J. Delfyett 9.26.14/ 12:30-1:30pm/ CREOL 103
SPIE Student Chapter Faculty Talk Series: “Perspectives
on a Research Career – from Industrial Research at Bell Communications Research
to Academia” by Dr. Peter J. Delfyett
Friday, September 26, 2014 12:30 PM to 1:30 PM
CREOL Room 103
CREOL Room 103
Abstract:
This presentation will be a personal perspective on how one
can manage their research career, whether it is in a world class industrial
research lab or in a research intensive university. I will try to highlight the
inherent challenges and rewards one might encounter on either path. I
will also discuss the transition from graduate school to the professional
career, as well as suggest possible strategies to help in navigating the
difficult times.
Biography:
Peter J. Delfyett received the B.E.(E.E.) degree from The
City College of New York in 1981, the M.S. degree in EE from The University of
Rochester in 1983, the M. Phil and Ph.D. degrees from The Graduate
School & University Center of the City University of New York in 1987 and
1988, respectively. His Ph.D. thesis was focused on developing a real
time ultrafast spectroscopic probe to study molecular and phonon dynamics in
condensed matter using optical phase conjugation techniques.
After obtaining the Ph.D. degree, he joined Bell
Communication Research as a Member of the Technical Staff, where he
concentrated his efforts towards generating ultrafast high power optical pulses
from semiconductor diode lasers, for applications in applied photonic networks.
Some of his technical accomplishments were the development of the world’s
fastest, most powerful modelocked semiconductor laser diode, the demonstration
of an optically distributed clocking network for high speed digital switches
and supercomputer applications, and the first observation of the optical
nonlinearity induced by the cooling of highly excited electron-hole pairs in
semiconductor optical amplifiers. While at Bellcore, Dr. Delfyett
received numerous awards for his technical achievements in these areas,
including the Bellcore Synergy Award and the Bellcore Award of Appreciation.
Dr. Delfyett joined the faculty at the College of Optics
& Photonics and the Center for Research and Education in Optics and Lasers
(CREOL) at the University of Central Florida in 1993, and currently holds the
positions of University of Central Florida Trustee Chair Professor of Optics,
ECE & Physics.
Dr. Delfyett served as the Editor-in-Chief of the IEEE
Journal of Selected Topics in Quantum Electronics (2001-2006), and served on
the Board of Directors of the Optical Society of America. He served as an
Associate Editor of IEEE Photonics Technology Letters, was Executive Editor of
IEEE LEOS Newsletter (1995-2000) and sits on the Presidential Science Advisory
Council of the Orlando Science Center. He is a Fellow of the Optical
Society of America, Fellow of IEEE Photonics Society, Fellow of the American
Physical Society, and a Fellow of the National Academy of Inventors, was a
member of the Board of Governors of IEEE-LEOS (2000-2002), and is also a member
of Tau Beta Pi, Eta Kappa Nu, and Sigma Xi, and SPIE. Dr. Delfyett has been
awarded the 1992 YMCA New Jersey Black Achievement Award, the 1993 National
Black Engineer of the Year Award – Most Promising Engineer, the University
Distinguished Research Award ’99, and highlighted in Design News’ “Engineering
Achievement Awards”. In addition, Dr. Delfyett has been awarded the
National Science Foundation’s Presidential Faculty Fellow Early Career Award
for Scientists and Engineers, which is awarded to the Nation’s top 20 young
scientists. Dr. Delfyett has published over 700 articles in refereed
journals and conference proceedings, has been awarded 36 United States Patents,
and has been highlighted on ‘C-SPAN’, “mainstreekweek.com” and in
“Career Encounters”, a PBS Special on technical careers in the optics and
photonics field. Dr. Delfyett was awarded the 1999 University
Distinguished Researcher of the Year Award, the 2000 Black Engineer of the Year
Award – Outstanding Alumnus Achievement, and the 2000 Excellence in Graduate
Teaching Award. He was awarded the University of Central Florida’s 2001
Pegasus Professor Award which is the highest honor awarded by the
University. He is also a Founding Member in NSF’s Scientists and Engineers
in the School Program, which is a program to teach 8th graders
about the benefits of science, engineering and technology in society. In
2003, Dr. Delfyett received the Technology Innovation Awardfrom the Orlando
Economic Development Commission. He was selected as one of the “50 Most
Important Blacks in Research Science in 2004” and as a “Science Trailblazer in
2005 and 2006” by Career Communications Group and Science Spectrum
Magazine. He was awarded the APS Edward Bouchet Award for his significant
scientific contributions in the area of ultrafast optical device physics and
semiconductor diode based ultrafast lasers, and for his exemplary and
continuing efforts in the career development of underrepresented minorities in
science and engineering. Dr. Delfyett has also endeavored to transfer
technology to the private sector, and helped to found “Raydiance, Inc.” which
is a spin-off company developing high power, ultrafast laser systems, based on
Dr. Delfyett’s research, for applications in medicine, defense, material
processing, biotech and other key technological markets. Dr.
Delfyett was also elected to serve 2 terms as President of the National Society
of Black Physicists (2008-2012). Most recently, he was awarded the 2014
Medalist from the Florida Academy of Sciences for his outstanding contributions
scientific research, and to the stimulation of interest and promotion of
scientific knowledge.
For additional information
Javed Rouf Talukder
President of SPIE student chapter
Tuesday, September 16, 2014
Seminar: "Semiconductor Nanomaterials for Information and Energy Technologies" by Dr. Yajie Dong 10.6.14/ 11:00am-12:00pm/ CREOL 103
Seminar: "Semiconductor Nanomaterials for
Information and Energy Technologies" by Dr. Yajie Dong
Monday, October 6, 2014 11:00 AM to 12:00 PM
CREOL Room 103
CREOL Room 103
ABSTRACT:
Low dimensional nanomaterials (1 D nanowires and 0 D quantum
dots) represent important nanoscale building blocks with substantial potential
for exploring new device concepts and materials for nanoelectronics,
optoelectronics and energy technology applications. Three examples will be
presented. First, I will discuss my discovery of unique rectified
silver/amorphous silicon/crystalline silicon (Ag/a-Si/c-Si) crossbar resistive
random access memory (RRAM) effect in c-Si/a-Si core/shell nanowires and provide
a comprehensive comparison between nanowire based and planar silicon based
Ag/a-Si/c-Si RRAMs. The history of how this accidental nanowire based discovery
solved a decades-long sneak current problem in RRAM field and eventually
evolved into a game changing mainstream flash memory successor, Crossbar
Memory, will be presented. Then I will report the experimental realization of
high efficiency single coaxial group III-nitride heterostructured nanowire
photovoltaic devices and light emitting devices. Meanwhile, a universal van der
Waals epitaxial growth strategy for compound semiconductor nanowire arrays will
be discussed. The vision of how the combination of nanowire array growth and
heterostructured nanowire devices could possibly change the substrate limited status
of III-Nitride research fields will be outlined. Lastly, I will present how
quantum dots materials innovation and novel device structure design/processing
helped resolve one long standing issue for organic based light emitting
devices, the efficiency roll off at high driving current density. As a result,
record breaking ultrabright, highly efficient, low roll off inverted red
quantum dot light emitting devices (QLEDs) have been achieved (165,000Cd/m2 at
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Dean & Director, Professor of Optics
407-882-3326
BIOGRAPHY:
Dr. Yajie Dong is an assistant professor in NanoScience
Technology Center of University of Central Florida. He got his BS and MS
degrees in Chemistry from Tsinghua University of Beijing, China. In 2010, he
received his PhD degree from Prof. Charles Lieber's group at Chemistry and
Chemical Biology Department of Harvard University. From 2010 to 2012, he was a
postdoctoral associate working with Professors Yet-Ming Chiang and W. Craig
Carter in the department of Material Science and Engineering at the
Massachusetts Institute of Technology. Before joining NSTC of UCF in August
2014, he worked as a Senior Scientist for QD Vision Inc., a Nanotech Startup
based on research of Professors Moungi Bawendi and Vladimir Bulovic’s groups at
MIT and located in Lexington, MA. He is broadly interested in materials
challenges in nanoelectronics, optoelectronics and energy technologies,
particularly in nanoscale nonvolatile resistive switches for information
processing and storage, compound semiconductor nanowires or quantum dots based
high efficiency energy conversion (LED and PV) devices and new battery
materials and architectures for large scale energy storage.
For additional information:
Dr.
Bahaa SalehDean & Director, Professor of Optics
407-882-3326
Monday, September 15, 2014
Seminar: "Sensing molecules with frequency combs" By Dr. Konstantin Vodopyanov 11.7.14/ 12:00-1:00pm/ CREOL Rm 103
Abstract:
Optical frequency combs produced in the visible spectral
range by ultrafast mode-locked lasers have revolutionized precision
spectroscopy and time metrology, culminating in the 2005 Nobel Prize in
Physics. I will present a new technique for extending frequency combs to the
highly desirable yet difficult-to-achieve mid-infrared range - the region of
fundamental molecular vibrational-rotational resonances (fingerprints). The
technique is based on subharmonic optical parametric oscillation (OPO) that can
be considered as a reverse of second harmonic generation. Using ultrafast
erbium or thulium fiber lasers as a pump, we produce frequency combs that are
approximately octave wide and centered around 3 µm or 4 µm in wavelength. I
will talk about coherent properties of the generated mid-IR combs, as well as
their applications for trace molecular detection.
Biography:
Konstantin L. Vodopyanov obtained his MS degree from Moscow
Institute of Physics and Technology ("Phys-Tech") and accomplished
his PhD and DSc (Habilitation) in the Oscillations Lab. of Lebedev Physical Institute
(later General Physics Inst.), led by Nobel Prize winner Alexander Prokhorov.
He was an assistant professor at Moscow Phys-Tech (1985-90),
Alexander-von-Humboldt Fellow at the University of Bayreuth, Germany (1990-92),
and a Royal Society postdoctoral fellow and lecturer at Imperial College,
London, UK (1992-98). In 1998, he moved to the United States and became head of
the laser group at Inrad, Inc., NJ (1998-2000), and later director of mid-IR
systems at Picarro, Inc.,CA (2000-2003). His other industry experience includes
co-founding and providing technical guidance for several US and European
companies. In 2003 he returned to Academia (Stanford University, 2003-2013) and
is now a 21st Century Scholar Chair & Professor of Optics at CREOL, College
of Optics & Photonics, Univ. Central Florida. Dr. Vodopyanov is a Fellow of
the American Physical Society (APS), Optical Society of America (OSA), SPIE -
International Society for Optical Engineering, UK Institute of Physics (IOP),
and a Senior Member of IEEE. He has > 325 technical publications and is
member of program committees for several major laser conferences including CLEO
(most recent, General Chair in 2010) and Photonics West (Conference Chair). His
research interests include nonlinear optics, laser spectroscopy, mid-IR and
terahertz-wave generation, ultra broadband frequency combs and their biomedical
applications.
For additional information:
Konstantin Vodopyanov
Wednesday, September 3, 2014
Distinguished Seminar Series: "Optical technologies paving the road from Helmet Mounted Displays to Virtual and Augmented Reality consumer headsets, Smart Glasses and Smart Eyewear." by Bernard Kress, PhD. 10.10.14/12:00pm-1:00pm/ CREOL Room 103
Distinguished Seminar Series: "Optical technologies
paving the road from Helmet Mounted Displays to Virtual and Augmented Reality
consumer headsets, Smart Glasses and Smart Eyewear." by Bernard Kress,
PhD.
Friday, October 10, 2014 12:00 PM to 1:00 PM
CREOL Room 103
CREOL Room 103
Bernard Kress, PhD.
Principal Optical Architect
Google Glass Project
Google [X] Labs.
Abstract:
Helmet Mounted Displays (HMDs) and Head Up Displays (HUDs)
have been used extensively over the last decades in the defense sector. The
complexity of the design and the fabrication of high quality see-through
combiner optics to achieve high resolution over a large FOV have prevented
their use in consumer electronic devices.
Occlusion Head Mounted Displays (HMD) have also been used in
the defense sector for simulation and training purposes, over similar large
FOV, packed with custom head tracking and eye gesture sensors.
Recently, a paradigm shift to consumer electronics has
occured as part of the wider wearable computing effort. Technologies developed
for the smart phone industry have been used to build smaller, lower power,
cheaper, electronics. Similarly, novel integrated sensors and micro-displays
have enabled the development of consumer electronic smart glasses and smart
eyewear, professional AR (Augmented Reality) HMDs as well as VR (Virtual Reality)
headsets.
Reducing the FOV while addressing the needs for an increased
exit pupil alongside stringent industrial design constrains have been pushing
the limits of the design techniques available to the optical engineer
(refractive, catadioptric, micro-optic, segmented Fresnel, waveguide,
diffractive, holographic, …).
However, the integration of the optical combiner within
conventional meniscus prescription lenses is a challenge that has yet to be
solved.
We will review how various optical design techniques have
been applied to such tasks, as well as the various head-worn devices developed
to date. Finally, we will review additional optical technologies applied as
input mechanisms (eye and head gesture sensing, gaze tracking and hand gesture
sensing).
Biography:
For over 20 years, Bernard has made significant scientific
contributions as a researcher, professor, consultant, advisor, instructor, and
author, in the field of micro-optics, diffractive optics and holography for
research, industry and consumer electronics. He has been involved in half a
dozen start-ups in the Silicon Valley on optical data storage, optical telecom,
optical position sensors and display (picos, HUDs and HMDs). Bernard holds 28
international granted patents and 30 patents applications. He has published
more than 100 proceeding papers and 18 refereed journal papers. He is a short
course instructor for the SPIE on micro-optics, diffractive optics and wafer
scale optics. He has published three books edited by John Wiley and Sons and Mac
Graw Hill and a field guide by SPIE. He has been chairman of the SPIE
conference “Photonics for Harsh Environments” for the past three years. He is
currently with Google [X] working on the Google Glass project as principal
Optical Architect.
For more information:
Dr. Bahaa Saleh
Dean & Director, Professor of Optics
407-823-6834
Seminar: "Recent advances in LIBS instrumentation: Application in quantification and elemental imaging" by Vincent Motto-Ros 9.26.14/ 11:00am-12:00pm/ CREOL Room 103
Seminar: "Recent advances in LIBS instrumentation:
Application in quantification and elemental imaging" by Vincent Motto-Ros
Friday, September 26, 2014 11:00 AM to 12:00 PM
CREOL Room 103
CREOL Room 103
Abstract
Laser-Induced Breakdown Spectroscopy (LIBS) is recognized as
a promising technique which enables elemental analysis of any type of material.
It is extremely versatile with high potential in term of applications, offering
standoff analysis capability, requiring only simple sample preparation, and
providing fast and real-time analysis. However, improving the repeatability and
the reproducibility of LIBS measurements is still the challenging issue faced
by the technique to fit the requirements of precise and accurate quantitative
analysis.
In the first part of this presentation, I will describe a
new generation of LIBS instrument developed in our institute. The basic
instrumental concept is to assist, either manually or automatically, the
optical detection fiber by a real-time imaging of the plasma. This tends to
improve greatly the stability of LIBS measurement in short as well in long
terms [1], allowing unprecedented level of performances in elemental
quantification (c.f. fig. 1a.). In the second part, some of our recent results
will be presented in the frame of elemental imaging of biological tissue. We
will show different examples of elemental images, sections of tumors and murine
kidneys, with an investigation focused on the renal clearance of theranostic
gadolinium-based nanoparticles (Fig. 1b.). The efficiency of LIBS imaging
allows elements being mapped and quantified in tissues without any labeling and
with an instrumentation fully compatible with standard optical microscope
systems, offering a valuable tools in the fields of nanotechnology, biology, as
well as medicine. [2].
Fig. 1. a) Example of calibration curve typically
obtained with our LIBS setup. b) Elemental imaging principle and example of
images obtained for a section of murine kidneys with 20 µm space resolution.
[1] Motto-Ros, V et al. Precise alignment of
the collection fiber assisted by real-time plasma imaging in laser-induced
breakdown spectroscopy. Spectrochim. Acta B 92, 60-69 (2014).
[2] Sancey, L. et al. Laser spectrometry for
multi-elemental imaging of biological tissues, Sc. Rep. 4, 6065
(2014).
Biography:
Associated Professor, Institut Lumière Matière, Université
Claude Bernard Lyon 1, Domaine Scientifique de La Doua, Bâtiment Kastler, 69622
Villeurbanne, France
Vincent Motto-Ros graduated with a M.S. in "Laser and
Spectroscopy" in the University of Lyon (France) in 2002 and continued to
complete his Ph.D. in the 'Laboratoire de Spectrométrie Ionique et Moléculaire'
(Lasim, Lyon) working on "high-precision and high-sensitive spectroscopy
of gaseous molecular species (O2, H2O, NO2) using high finesse cavities pumped
by CW laser diode" under the direction of Pr. Patrick Rairoux. He starts
his research on LIBS in 2007 with a post-Doc position in the Canadian Space
Agency for which he demonstrated the potential of artificial neural network
(ANN) in LIBS data processing for material identification and quantitative
measurements of elements of planetological interest. He was recruited in 2008
by the Lyon 1 University as Associated Professor in the Jin Yu’s team (LASIM,
called now Light and Matter Institute). He developed advanced experimental
setups for fundamental research as well as applications related to
laser-induced plasma. His panel covers the fundamentals of laser-induced
plasmas, the application of laser spectroscopies such as LIBS, Fluorescence and
Raman, as fundamental diagnostics as well as sensing techniques for industrial,
environmental, geological and biomedical applications.
For additional information:
Dr. Matthieu Baudelet
407-823-6910
Tuesday, September 2, 2014
PHYSICS COLLOQUIUM - Dr. Michael Rubinstein of University of North Carolina, Friday, September 5, 4:30 pm, PSB 161
Airway Surface
Brush Sweeps Lungs Clean: Polymer Physics Helps Us Breathe Easier
The classical view of the airway surface liquid (ASL) is
that it consists of two layers – mucus and periciliary layer (PCL). Mucus layer
is propelled by cilia and rides on the top of PCL, which is assumed to be a low
viscosity dilute liquid. This model of ASL does not explain what stabilizes the
mucus layer and prevents it from penetrating the PCL. I propose a different
model of ASL in which PCL consists of a dense brush of mucins attached to
cilia. This brush stabilizes mucus layer and prevents it penetration into PCL,
while providing lubrication and elastic coupling between beating cilia. Both
physical and biological implications of the new model will be discussed.
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