[Faculty] Fwd: [CSRC-SDSU COLLOQUIUM]: Designing Al/dielectric metamaterials with hyperbolic dispersion

[Jose Castillo]

*DATE*:  Friday, February 5th, 2016

*TITLE*:  Designing Al/dielectric metamaterials with hyperbolic dispersion

*TIME*:  3:30 PM

*LOCATION*:  GMCS 214

*SPEAKER*:  Prof. Lyuba Kuznetsova, Physics Department SDSU

*ABSTRACT*: A special class of nano-layered hyperbolic metamaterials has
received a lot of attention recently due to their unique optical property
namely that the dispersion of the dielectric constant for hyperbolic
metamaterials
exhibits a topological transition in the isofrequency surface from an
ellipsoid to a hyperboloid. The unique property of propagating waves in
such a metamaterial is that the wavevectors have unbounded magnitudes which
allows dramatic increases of the photon density of states. The presence of
these additional electromagnetic states allows modification of the
spontaneous emission rate. Exploring these effects with an Al/dielectric
metamaterials could allow for an efficient integration into current
technology for potential use in label-free detection of organic and
biological systems, and ultrafast LEDs.

This talk will cover a few concepts and materials systems that are
promising for designing metamaterials with hyperbolic dispersion. In
particular, I will discuss our recent work on the fabrication and
characterization
of nano-layered Al/dielectric metamaterials with a limited number of atomic
size layers. I will talk about the theoretical modeling of the permittivity
of the Al/dielectric nano-layered structures. I will introduce our recently
developed method for analysis of spectroscopic ellipsometry data to extract the
optical permittivity for this highly anisotropic metamaterial. This method
maps the electromagnetic response using the dielectric tensor of a
material. Finally, I will talk about our recent study of the "infinitely
small" nanocavities and conclude with the possible directions for future
work toward creating ultrafast LEDs and low threshold lasers.

*HOST*:  Dr. Jose Castillo.

For future events, please visit our website at:

http://www.csrc.sdsu.edu/colloquium.html

_______________________________________________
SDSU Computational Science Research Center
Mailing List



-- 

Jose E. Castillo  Ph.D.

Director / Professor

Computational Science Research Center

5500 Campanile Dr

San Diego State University

San Diego CA 92182-1245

619 5947205/3430, Fax 619-594-2459

 http://www.csrc.sdsu.edu/mimetic-book/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://engineering.sdsu.edu/pipermail/faculty/attachments/20160202/6ef9243a/attachment.html>