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Center for Excitonics
Seminar Series Announcement
Tuesday, March 8, 2011
3:00 PM
RLE Conference Room: 36-428
Vinod M Menon, Queens College of CUNY
"CONTROL OF LIGHT-MATTER INTERACTION USING DISPERSION ENGINEERED PHOTONIC
STRUCTURES"
Abstract:
Coherent interaction of an ensemble of dipole active atoms or excitons with
vacuum electromagnetic field has been studied extensively since its initial
conception by Dicke in 1954. However, when the emitters are not only
periodically arranged, but are also placed in a periodically modulated
dielectric environment, the interaction between them is carried by the
electromagnetic Bloch waves of the photonic crystal. This coherent
interaction results in the formation of strongly coupled light-matter
quasiparticles called Bloch polaritons. In this talk I will discuss our
recent work demonstrating the formation of such quasiparticles in a
periodically arranged multiple quantum well system. Tuning of these
polariton states using electric field and its application for switching and
slow light enhanced nonlinear optics will also be discussed. Following this
I will discuss our recent work on dispersion engineered metamaterials for
controlling the spontaneous emission rate of quantum dots. Unlike
microcavity structures that rely on localization of electromagnetic field
for increase in the photon density of states, the present work exploits the
flat dispersion in anisotropic materials to create more states for the
emitter to emit through. Finally I will briefly discuss our work on
nonreciprocal optical elements realized using quasiperiodic photonic
crystals embedded with colloidal quantum dots.
Bio:
Dr. Vinod. M. Menon is an Associate Professor of Physics at Queens College
and Graduate Center of the City University of New York (CUNY). He joined
CUNY as part of the Photonic Initiative in 2004. Prior to joining CUNY he
was a research staff member at Princeton University (2003-04). He joined
Princeton as the Lucent Bell Labs Post Doctoral Fellow in Photonics in 2001.
He received his MSc in Physics from the University of Hyderabad, India in
1995 and his Ph.D. in Physics from the University of Massachusetts in 2001.
His current research interests include the development of classical and
non-classical light sources using quantum dots, metamaterials for
controlling light-matter interaction, and engineered nonlinear optical
materials using hybrid nanocomposites.
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