Manipulating Light in Nanohole Arrays and Nanocrystals
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Date: 11-30-2005
Start Time:
4:00pm
End Time: 5:00pm
Speaker: Teri Odom
From:
Northwestern University
Location: Interschool Lab, 7th floor, Schapiro/CEPSR
Hosted by:
Center for Integrated Science
Abstract:
This talk focuses on how the shape of nanostructures can control light on the nanometer scale. Two different systems will be discussed: (i)nanofabricated metallic films of nanohole arrays and (ii) chemically synthesized semiconducting nanocrystals. We will describe an innovative fabrication scheme for preparing large-area, free-standing films of nanoscale holes. These metallic films exhibit enhanced transmission with spectra characteristic of interacting holes. When investigated in the near-field, these films support surface plasmon polariton standing wave patterns whose wavelength and polarization can be controlled. Also, we will discuss how nano- and microcrystals of tin sulfide can have optical properties dramatically different from bulk, but whose properties can be attributed to a different crystal structure and not quantum size effects.