[E&E seminars] Special Energy Seminar [Tuesday, Mar. 2nd] with Dr. Linyou Cao - 11:45-1:15 pm - Rm 3-442

[Richard Brickman]

Tuesday

March 02, 2010

12:15 – 01:15 PM – ROOM 3-442

SEMINAR PRESENTATION

Dr. Linyou Cao

Department of Materials Science and Engineering,

Stanford University

Ph.D, Materials Science and Engineering, Stanford University

ABSTRACT

Optical Resonances in Semiconductor Nanowires

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.

      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.



Pizza lunch will be served from 11:45 am - 12:15 pm


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