<div dir="ltr"><br><div class="gmail_quote"><br><div dir="ltr"><br><img width="0" height="0" style="font-size:12.8px;border:0px;width:0px;min-height:0px;overflow:hidden"><img width="0" height="0" style="font-size:12.8px;border:0px;width:0px;min-height:0px;overflow:hidden"><b style="font-size:12.8px">DATE</b><span style="font-size:12.8px">: Friday, February 5th, 2016</span><div dir="ltr"><b style="font-size:12.8px"><br></b><div><b style="font-size:12.8px">TITLE</b><span style="font-size:12.8px">: Designing Al/dielectric metamaterials with hyperbolic dispersion</span><br style="font-size:12.8px"><br style="font-size:12.8px"><b style="font-size:12.8px">TIME</b><span style="font-size:12.8px">: </span><span style="font-size:12.8px"><span><span>3:30 PM</span></span></span><br style="font-size:12.8px"><br style="font-size:12.8px"><b style="font-size:12.8px">LOCATION</b><span style="font-size:12.8px">: GMCS 214</span><br style="font-size:12.8px"><br style="font-size:12.8px"><b style="font-size:12.8px">SPEAKER</b><span style="font-size:12.8px">: Prof. Lyuba Kuznetsova, Physics Department SDSU</span><br style="font-size:12.8px"><br style="font-size:12.8px"><b style="font-size:12.8px">ABSTRACT</b><span style="font-size:12.8px">: A special class of nano-layered hyperbolic metamaterials has received a lot of attention recently due to </span><span style="font-size:12.8px">their unique optical property namely that the dispersion of the dielectric constant for hyperbolic </span><span style="font-size:12.8px">metamaterials exhibits a topological transition in the isofrequency surface from an ellipsoid to a </span><span style="font-size:12.8px">hyperboloid. The unique property of propagating waves in such a metamaterial is that the wavevectors </span><span style="font-size:12.8px">have unbounded magnitudes which allows dramatic increases of the photon density of states. The </span><span style="font-size:12.8px">presence of these additional electromagnetic states allows modification of the spontaneous emission </span><span style="font-size:12.8px">rate. Exploring these effects with an Al/dielectric metamaterials could allow for an efficient integration </span><span style="font-size:12.8px">into current technology for potential use in label-free detection of organic and biological systems, and </span><span style="font-size:12.8px">ultrafast LEDs. </span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">This talk will cover a few concepts and materials systems that are promising for designing metamaterials </span><span style="font-size:12.8px">with hyperbolic dispersion. In particular, I will discuss our recent work on the fabrication and </span><span style="font-size:12.8px">characterization of nano-layered Al/dielectric metamaterials with a limited number of atomic size layers. </span><span style="font-size:12.8px">I will talk about the theoretical modeling of the permittivity of the Al/dielectric nano-layered structures. </span><span style="font-size:12.8px">I will introduce our recently developed method for analysis of spectroscopic ellipsometry data to extract </span><span style="font-size:12.8px">the optical permittivity for this highly anisotropic metamaterial. This method maps the electromagnetic </span><span style="font-size:12.8px">response using the dielectric tensor of a material. Finally, I will talk about our recent study of the </span><span style="font-size:12.8px">"infinitely small" nanocavities and conclude with the possible directions for future work toward creating </span><span style="font-size:12.8px">ultrafast LEDs and low threshold lasers.</span></div><div style="font-size:12.8px"><font color="#000000" face="Times New Roman, Times, serif"><span style="font-size:14px;line-height:21px"><br></span></font><b style="font-size:12.8px">HOST</b><span style="font-size:12.8px">: Dr. Jose Castillo.</span></div><div style="font-size:12.8px"><br style="font-size:12.8px"><span style="font-size:12.8px">For future events, please visit our website at:</span><br style="font-size:12.8px"><br style="font-size:12.8px"><a href="http://www.csrc.sdsu.edu/colloquium.html" style="font-size:12.8px" target="_blank">http://www.csrc.sdsu.edu/colloquium.html</a></div></div><font face="yw-61e2e2c0532b7069cd31b7bc972c533c4ff3fd5b-521b9ce04465183268e7f5c6063ffca0--o"></font></div>
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SDSU Computational Science Research Center<br>
Mailing List<br></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">
<p>Jose E. Castillo Ph.D.</p><p>Director / Professor </p>
<p>Computational Science Research Center</p>
<p>5500 Campanile Dr</p>
<p>San Diego State University</p>
<p>San Diego CA 92182-1245</p>
<p>619 5947205/3430, Fax 619-594-2459</p><p> <a href="http://www.csrc.sdsu.edu/mimetic-book/" target="_blank">http://www.csrc.sdsu.edu/mimetic-book/</a></p></div>
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