Subbandgap Asymmetric Surface Plasmon Waveguide Schottky Detectors on Silicon

Silicon-based surface-plasmon subbandgap detectors integrated with an asymmetric metal stripe are investigated for different metals, modes, and wavelengths of operation. Low-order bound modes supported by Al and Au stripes cladded below by silicon and covered by air are studied at the infrared wavel...

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Published in:IEEE journal of selected topics in quantum electronics 2013-05, Vol.19 (3), p.4600209-4600209
Main Authors: Akbari, A., Olivieri, A., Berini, P.
Format: Article
Language:English
Subjects:
Asymmetry
Couplings
Detectors
Devices
Gold
Infrared
Nanostructure
photodetector
Photodetectors
Photoelectric effect
photonics
plasmonics
Schottky
Schottky barriers
Silicon
surface plasmon polariton
Wavelengths
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description Silicon-based surface-plasmon subbandgap detectors integrated with an asymmetric metal stripe are investigated for different metals, modes, and wavelengths of operation. Low-order bound modes supported by Al and Au stripes cladded below by silicon and covered by air are studied at the infrared wavelengths of 1310 and 1550 nm. Input optical power is end-fire coupled into the modes supported by the stripe, resulting in the total absorption of coupled power over a short length. The absorbed power creates excited carriers in the metal throughout the modal absorption volume, which can cross the Schottky barrier and become collected as photocurrent (internal photoemission). Measurements obtained for Au on n-type Si support predicted trends. The device has promise for applications in short-reach high-speed optical interconnects and silicon-based nanophotonics.
doi_str_mv 10.1109/JSTQE.2012.2213585
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source IEEE Electronic Library (IEL) Journals
subjects Asymmetry
Couplings
Detectors
Devices
Gold
Infrared
Nanostructure
photodetector
Photodetectors
Photoelectric effect
photonics
plasmonics
Schottky
Schottky barriers
Silicon
surface plasmon polariton
Wavelengths
title Subbandgap Asymmetric Surface Plasmon Waveguide Schottky Detectors on Silicon
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