Thursday, August 21, 2014

TOMORROW! Student Chapter Seminar: "Generation and modulation of optical vortices with liquid crystal technology" by Prof. Yan-qing Lu 8.22.14/11:00am-12:00pm/ CREOL 103

Seminar: "Generation and modulation of optical vortices with liquid crystal technology" by Prof. Yan-qing Lu
Friday, August 22, 2014 11:00 AM to 12:00 PM
CREOL Room 103

Prof. Yan-qing Lu
College of Engineering and Applied Sciences, Nanjing University, China

Abstract:
We present a technique for producing tunable optical vortices and other structured wavefronts by using liquid crystal (LC) photo-patterning technology. To write patterned alignment structures in to LC cells, a home-made micro-lithography system with a digital micro-mirror device (DMD) as dynamic mask forms arbitrary micro-images on photo-alignment layers and further guides the LC molecule orientations. Arbitrary fine photo-patterning fork gratings, polarization fork gratings, q-plates are fabricated. The related wavefront transformation properties are studied. Clear optical vortices with designed topological charges are obtained in different wavelengths. When a voltage is applied on the cell, index re-distribution is induced due to the realignment of LC molecules; and then the optical vortices become tunable. In addition, some recent results on LC tunable Airy beams, vector beams are also introduced.

Biography:
Prof. Yan-qing Lu received both his BS and Ph.D. degrees from Nanjing University, China, in 1991 and 1996 respectively. He has five-year experiences in US and China telecomm industries. He designed and developed a serial of liquid crystal based fiber-optic devices with his colleagues, which include variable optical attenuators, variable Mux/Demux, DWDM wavelength blocker etc. He is currently a Professor at the College of Engineering and Applied Sciences, Nanjing University. His research interests include liquid crystal photonics, nonlinear optics and fiber optics. He is the author or co-author of ~130 peer-reviewed papers with over 1600 ISI citations. He also holds more than 40 domestic or international patents or pending patents. He currently serves as a deputy editor of Optical Materials Express. He was a visiting research scientist in Prof. S. T. Wu’s group in CREOL from 2003 to 2005.

For more information:
Prof. Shin-Tson Wu, 407-823-4763
SID Student Chapter: Daming Xu
IEEE Photonics Student Chapter: Zhenyue Luo


Wednesday, August 20, 2014

Congratulations to Bond, Schoeneck & King PLLC, an FPC member, which was recognized with 81 attorneys selected by their peers for inclusion in The Best Lawyers in America® 2015 listing, representing 24 practice areas.  Bill Greener, our FPC supporter at BSK, is among those selected for this fine recognition of their skills and accomplishments.

Monday, August 18, 2014

NSTC & CREOL Distinguished Seminar: "Nanotechnology Meets Biology in the Cancer Cell" by: Dr. Mostafa A. El-Sayed 9.5.14/3:00-4:00pm/ CREOL Room 102 & 103

NSTC & CREOL Distinguished Seminar: "Nanotechnology Meets Biology in the Cancer Cell" by: Dr. Mostafa A. El-Sayed
Friday, September 5, 2014 3:00 PM to 4:00 PM
CREOL Room 102 & 103
  
Dr. Mostafa A. El-Sayed
Regents Professor and Julius Brown Chair
School of Chemistry and Biochemistry
Laser Dynamics Laboratory (LDL)
Georgia Institute of Technology
Atlanta, Georgia

Abstract:
The Properties of material is determined by the space available for their electrons to undergo their characteristic motion. This space ranges from 1-100 nm for the different materials around us. If the material size changes below its characteristic size, its property changes and becomes new material and its property become sensitive to further changes in size or shape. The important new properties of metallic Silver and Gold having nanometer sizes will be discussed. Their new optical and photothermal properties will be detailed and used in detecting, treating and following the dynamic properties of alive cancer cells and as they die.

For additional information:


Monday, August 11, 2014

TOMORROW! Seminar:"High energy x-rays and Photo-luminescence spectroscopy to investigate the mechanics of ceramic coatings for extreme environments and sensing applications" by Seetha Raghavan 8.12.14/11:00am-12:00pm/ CREOL Room 102

High energy x-rays and Photo-luminescence spectroscopy to investigate the mechanics of ceramic coatings for extreme environments and sensing applications" by Seetha Raghavan
Tuesday, August 12, 2014 11:00 AM to 12:00 PM
CREOL Room 102

Seetha Raghavan
Department of Mechanical and Aerospace Engineering, University of Central Florida

Abstract:
Ceramics and Ceramic composites hold promise for meeting the extreme environments that accompany hypersonic and space applications. The strain-dependent characteristics of ceramics under the effect of light sources, such as the brilliance of lasers and high energy x-rays, can provide key information on the behavior that makes these material systems superior, and yet limits their durability. These non-invasive techniques transcend length scales, providing high-resolution measurements that target the strain response of individual materials within the composite. The exploration of these techniques for in situ measurements under thermal and/or mechanical conditions will be discussed for thermal barrier coatings (TBC) and alumina nanocomposites. In TBCs, synchrotron x-ray diffraction measurements provide both qualitative and quantitative in situ results on the strain evolution over the depth. Here, the effect of mechanical loads at critical points within the thermal cycle was determined. In the study of ceramic reinforcements within a matrix, photo-luminescent spectral peaks reveal load transfer behavior under varying volume fractions of alumina nanoparticles. Developments made through these research areas are currently being used to expand the versatility of the techniques to meet realistic testing environments and to enable structural diagnostics tools.

Biography:
Dr Raghavan joined UCF in Fall 2008 after completing her doctoral studies at Purdue University, Indiana, School of Aeronautics and Astronautics in the area of Structures & Materials. She obtained her M.S., Aeronautical Engineering in Structures at SUPAERO (ISAE), Toulouse, France where she also worked with Messier Bugatti in Velizy, Paris. Prior to this, she completed her B.Eng in Mechanical Engineering at Nanyang Technological University, Singapore. She has experience in the aerospace industry where she was a senior engineer involved in Aircraft Structural Analysis, Aircraft Maintenance, Repair & Modifications and Non-destructive testing research & development for Fatigue crack Inspection using Ultrasonic and Eddy current techniques.

For additional information:
Dr. Bahaa E. A. Saleh
Dean & Director, Professor of Optics

407-882-3326

Thursday, August 7, 2014

TOMORROW! Seminar: "Enhanced light matter interactions in silicon plasmonic platform" by Dr.Uriel Levy 8.8.14/ 1:00pm-2:00pm/ CREOL Room 102

Seminar: "Enhanced light matter interactions in silicon plasmonic platform" by Dr. Uriel Levy
Friday, August 8, 2014 1:00 PM to 2:00 PM
CREOL Room 102

Abstract:
Following the ongoing effort for miniaturization of devices and systems, on chip nanoscale photonic and plasmonic based devices and system are becoming a reality. In this talk I describe our recent progress towards the construction of on chip silicon photonics and silicon plasmonics passive and active devices. This effort include the demonstration of plasmonic enhanced silicon photo detectors for the infrared, nanoscale electro optical modulators in silicon, nanoscale confinement of electromagnetic energy and nonlinear interactions of light with hot vapor on a chip. Additionally, I will present an approach for thermal mapping with nanoscale resolution and apply this approach for the characterization of nanoscale photonic and plasmonic devices. Finally, I will share our recent results of on chip spectroscopy and nonlinear interactions using the platform of atomic clad waveguide and plasmonic assisted atomic transitions.

Biography:
Prof. Uriel Levy joined the Department of Applied Physics, School of Engineering and Computer Science of the Hebrew University of Jerusalem (HUJI) in fall 2006. Prior to that he spent nearly 4 years as a post graduate researcher at the University of California, San Diego. He holds a Ph.D degree in electrical engineering from Tel Aviv University and BS.c in physics and material engineering from the Technion institute of technology. His major research interests include nanophotonics, with focus on silicon photonics and plasmonics, for applications in communication, imaging, lithography, memory, alternative energy and sensing.

For additional information:
Dr. Demetrios Christodoulides

407-882-0074

Wednesday, August 6, 2014

SID Student Chapter Seminar: "Generation and modulation of optical vortices with liquid crystal technology" by Prof. Yan-qing Lu 8.22.14/ 11:00am-12:00pm/ CREOL 102

Seminar: "Generation and modulation of optical vortices with liquid crystal technology" by Prof. Yan-qing Lu
Friday, August 22, 2014 11:00 AM to 12:00 PM
CREOL Room 102

Prof. Yan-qing Lu
College of Engineering and Applied Sciences, Nanjing University, China

Abstract:
We present a technique for producing tunable optical vortices and other structured wavefronts by using liquid crystal (LC) photo-patterning technology. To write patterned alignment structures in to LC cells, a home-made micro-lithography system with a digital micro-mirror device (DMD) as dynamic mask forms arbitrary micro-images on photo-alignment layers and further guides the LC molecule orientations. Arbitrary fine photo-patterning fork gratings, polarization fork gratings, q-plates are fabricated. The related wavefront transformation properties are studied. Clear optical vortices with designed topological charges are obtained in different wavelengths. When a voltage is applied on the cell, index re-distribution is induced due to the realignment of LC molecules; and then the optical vortices become tunable. In addition, some recent results on LC tunable Airy beams, vector beams are also introduced.

Biography:
Prof. Yan-qing Lu received both his BS and Ph.D. degrees from Nanjing University, China, in 1991 and 1996 respectively. He has five-year experiences in US and China telecomm industries. He designed and developed a serial of liquid crystal based fiber-optic devices with his colleagues, which include variable optical attenuators, variable Mux/Demux, DWDM wavelength blocker etc. He is currently a Professor at the College of Engineering and Applied Sciences, Nanjing University. His research interests include liquid crystal photonics, nonlinear optics and fiber optics. He is the author or co-author of ~130 peer-reviewed papers with over 1600 ISI citations. He also holds more than 40 domestic or international patents or pending patents. He currently serves as a deputy editor of Optical Materials Express. He was a visiting research scientist in Prof. S. T. Wu’s group in CREOL from 2003 to 2005.

For more information:
Prof. Shin-Tson Wu, 407-823-4763, 
SID Student Chapter: Daming Xu, 

IEEE Photonics Student Chapter: Zhenyue Luo, 

Tuesday, August 5, 2014

Seminar: "Enhanced light matter interactions in silicon plasmonic platform" by Dr.Uriel Levy 8.8.14/ 1:00pm-2:00pm/ CREOL Room 102

Seminar: "Enhanced light matter interactions in silicon plasmonic platform" by Dr. Uriel Levy
Friday, August 8, 2014 1:00 PM to 2:00 PM
CREOL Room 102

Abstract:
Following the ongoing effort for miniaturization of devices and systems, on chip nanoscale photonic and plasmonic based devices and system are becoming a reality. In this talk I describe our recent progress towards the construction of on chip silicon photonics and silicon plasmonics passive and active devices. This effort include the demonstration of plasmonic enhanced silicon photo detectors for the infrared, nanoscale electro optical modulators in silicon, nanoscale confinement of electromagnetic energy and nonlinear interactions of light with hot vapor on a chip. Additionally, I will present an approach for thermal mapping with nanoscale resolution and apply this approach for the characterization of nanoscale photonic and plasmonic devices. Finally, I will share our recent results of on chip spectroscopy and nonlinear interactions using the platform of atomic clad waveguide and plasmonic assisted atomic transitions.

Biography:
Prof. Uriel Levy joined the Department of Applied Physics, School of Engineering and Computer Science of the Hebrew University of Jerusalem (HUJI) in fall 2006. Prior to that he spent nearly 4 years as a post graduate researcher at the University of California, San Diego. He holds a Ph.D degree in electrical engineering from Tel Aviv University and BS.c in physics and material engineering from the Technion institute of technology. His major research interests include nanophotonics, with focus on silicon photonics and plasmonics, for applications in communication, imaging, lithography, memory, alternative energy and sensing.

For additional information:
Dr. Demetrios Christodoulides
407-882-0074

demetri AT creol DOT ucf DOT edu