Seminar: “Ultrafast Nano-optics”, Markus B. Raschke, University of Colorado at Boulder
CREOL 102
Wednesday, June 1, 2011 / 11am-12pm
Markus B. Raschke
Department of Physics, Department of Chemistry, and JILA
University of Colorado at Boulder
Abstract:
Combining plasmonic and optical antenna concepts with ultrafast and shaped laser pulses allows for the precise control of an optical excitation on femtosecond time and nanometer length scales. I will present several new concepts extending tip-enhanced spectroscopy into the nonlinear and ultrafast regime for nano-scale imaging and spectroscopy of surface molecules and nano-solids. Examples include adiabatic nano-focusing on a tip for background free tip-enhanced molecular Raman spectroscopy, spatio-temporal superfocusing and coherent control at the 10 nm-10 fs level, and ultrafast free-induction decay near-field nano-IR spectroscopy of polymer nano-structures. I will discuss model calculations describing the relevant resonant plasmonic-molecular interaction. I will conclude with an outlook for future directions including the possibility for extreme nonlinear optics, strong light matter interaction, and radiative decay engineering.
Light scattering and scanning of a laser-illuminated sharp metal tip allows for measurements of the linear, inelastic, or nonlinear optical response of the sample with nanometer spatial and femtosecond temporal resolution.
Biography:
Markus Raschke is currently Associate Professor of Physics at the University of Colorado, Boulder. He obtained his PhD at the Max-Planck-Institute for Quantum Optics and the Technische Universität, Munich in 1999. He did his postdoc at UC Berkeley, followed by a research position at the Max-Born-Institute for Nonlinear and Ultrafast Optics and the Humboldt University, Berlin. From 2006-2010 he was Associate Professor of Chemistry at the University of Washington, Seattle. He is recipient of the Feodor Lynen Fellowship of the Alexander von Humboldt Foundation, the Otto-Hahn-Medal of the Max-Planck Society, a Fulbright Fellowship, and a Friedrich Naumann Foundation Scholarship
For More Information:
Dr. Pieter Kik
kik@creol.ucf.edu
Website: http://nano-optics.colorado.edu
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