Subject 8 Optical properties

Subject 8 Optical properties - Subject 8 Subject 8 Optical...

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Unformatted text preview: Subject 8 Subject 8 Optical Properties & Devices Optical Properties & Devices Week (2 meetings/wk) Contents (wk starting 1/25) Introduction ; Characterizing nanoscale structures (2/1) Processing I : Microfabrication, IC and IC compatible; Thermodynamics : effects of small systems (2/8) Blizzard of 2010 (2/15) Nanoporous materials : Au fuel cell and catalysis (Erlebacher); Processing II : Nanoparticles (Searson) (2/22) Kinetics , surface diffusion, surface smoothing. Mechanical properties of nanostructured materials (3/1) Electronic properties and devices : scattering, transport, mobility, mean free path, quantum confinement (dots and wells) (3/8) Nano in fluids (Cammarata); Bio nanosystems & properties (Mao) (3/15) Spring vacation (3/22) Nanostructures and devices for optical properties (3/29) Magnetic nanostructures/properties (4/5) Nanoscale reactive multilayers Student project presentations start (title due March 24 ) (4/12) Student project presentations (4/19) Student project presentations (4/26) Student project presentations (5/3) Student project presentations Revised syllabus When not semiconducting, nanoscale objects (e.g., nanofilms and nanoparticles) can have useful/unique optical responses as well We talked about semiconductor quantum dots, tuning bandgap for coloration, but we have not yet explained the colors of the stained glass, is it due to QDs, or other optical behavior associated with the nanoparticles in it? See the color of Au nanoparticles Metallic nanoparticles absorb visible light at a well-defined plasmon resonance frequency , at which the electromagnetic energy is efficiently converted into the motion of free electrons. The resonance frequency depends on the size, shape, and dielectric environment (examples later, by Halas). The absorption behavior determines the color. Light absorption in metal The dielectric function...
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This note was uploaded on 03/30/2010 for the course EN 510.422 taught by Professor Dr.evanma during the Spring '10 term at Johns Hopkins.

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Subject 8 Optical properties - Subject 8 Subject 8 Optical...

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