<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><p class="MsoNormal" align="center" style="text-align: center; "><b><span style="font-size: 28pt; color: red; ">Tuesday<o:p></o:p></span></b></p><p class="MsoNormal" align="center" style="text-align: center; line-height: 18px; "><b><span style="font-size: 22pt; line-height: 43px; color: red; ">March 02, 2010<o:p></o:p></span></b></p><p class="MsoNormal" align="center" style="text-align: center; line-height: 18px; "><b><span style="font-size: 18pt; line-height: 36px; color: red; ">12:15 – 01:15 PM – ROOM 3-442<o:p></o:p></span></b></p><p class="MsoNormal" align="center" style="text-align: center; line-height: 18px; "><b><span style="font-size: 18pt; line-height: 36px; color: red; ">SEMINAR PRESENTATION</span></b></p><p class="Default" align="center" style="text-align: center; "><font class="Apple-style-span" size="6"><span class="Apple-style-span" style="font-size: 21px; ">Dr. Linyou Cao</span></font></p><p class="Default" align="center" style="text-align: center; "><span style="font-size: 16pt; ">Department of Materials Science and Engineering,<o:p></o:p></span></p><p class="Default" align="center" style="text-align: center; "><span style="font-size: 16pt; ">Stanford University</span></p><p class="Default" align="center" style="text-align: center; "><span style="font-size: 14pt; ">Ph.D, Materials Science and Engineering, Stanford University</span></p><p class="MsoNormal" align="center" style="text-align: center; line-height: 24px; "><b><span style="font-size: 16pt; line-height: 42px; ">ABSTRACT<o:p></o:p></span></b></p><p class="MsoNormal" align="center" style="text-align: center; "><b>Optical Resonances in Semiconductor Nanowires</b></p><p class="MsoNormal" style="text-align: justify; text-indent: 0.5in; ">Semiconductor nanowires constitute one of the most exciting frontiers of materials research because of their potential application in a wide range of important fields, including information technology, biomedicine, sustainable energy, and artificial intelligence. Embarking on these exciting applications heavily hinges on a deep understanding of the fundamental physical properties of nanowires. For the first time, I experimentally demonstrate the existence of strong, tunable optical resonances in semiconductor nanowires, and propose an intuitive theoretical framework based on leaky mode resonances (LMRs) to understand and engineer the nanowire’s optical properties. The optical resonances enable engineering of the nanowire’s light absorption, scattering, and emission properties and a rational design of high-performance optoelectronic devices, including photodetectors, solar cells, and light emitters. I will also show that coupled optical resonances in arrays of nanowire can give rise to many novel optical functionalities that do not exist in stand-alone nanowires, for example, coupled nanowire optical waveguiding.</p><p class="MsoNormal" style="text-align: justify; "> Overall, these results represent the first systematic studies on the optical resonances of semiconductor nanowires. The demonstrated general existence of the LMRs and the coupled LMRs cast new light on semiconductor nanostructures, and open up enormous opportunities to explore novel optical and optoelectronic functionalities in semiconductor nanostructures for photonics applications. <span style="font-size: 16pt; "><o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal" align="center" style="text-align: center; "><b><span style="font-size: 16pt; color: red; ">Pizza lunch will be served from 11:45 am - 12:15 pm</span></b></p></div></div></div></div><div><br></div></body></html>