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- W2034671629 abstract "The use of metallic nanostructures for enhanced transmission and near field phenomena have been a topic of extensiveresearch. Here we present integration of active media, consisting of InAs quantum dots (QD) embedded in quantum wells,with 2 dimensional metallic hole arrays (2DHA) leading to a strong interaction between resonant surface plasmons, excitedat the metal-semiconductor interface, and intersubband transitions of quantum dots. The presence of a low-loss absorberwithin the enhanced near field region of 2DHA leads to an enhancement of photoresponse. The parameters of 2DHAwere designed to overlap with absorption peaks of QDs. We present techniques of fabrication, accurate characterization ofenhancement and efforts to optimize the 2DHA-QD coupling. Over an order of magnitude enhancement in photoresponseis observed due to spectral matching of intersubband absorption of quantum dots to that of 2DHA resonance, optimalplacement of QD within the structure, and improved interaction lengths due to lateral propagation. This enhancement is alsoaccompanied by significant narrowing of linewidth and the ability to tune the resonance by varying the 2DHA parameters.A hexagonal lattice with periodic circular holes on a thin gold film is used as the 2DHA. With further optimizations, thesestructures have significant applications in the mid-wave infrared (3-5 μm) and long-wave infrared (8-12 μm) regions formultispectral and polarization sensitive sensing" @default.
- W2034671629 created "2016-06-24" @default.
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- W2034671629 date "2013-02-21" @default.
- W2034671629 modified "2023-09-23" @default.
- W2034671629 title "Extraordinary plasmon-QD interaction for enhanced infrared absorption" @default.
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- W2034671629 doi "https://doi.org/10.1117/12.2005268" @default.
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