Title
Al nanogrid electrode for ultraviolet detectors
Abbreviated Journal Title
Opt. Lett.
Keywords
EXTRAORDINARY OPTICAL-TRANSMISSION; SURFACE-PLASMONS; Optics
Abstract
Optical properties of Al nanogrids of different pitches and gaps were investigated both theoretically and experimentally. Three-dimensional finite-difference time-domain simulation predicted that surface plasmons at the air/Al interface would enhance ultraviolet transmission through the subwavelength gaps of the nanogrid, making it an effective electrode on GaN-based photodetectors to compensate for the lack of transparent electrode and high p-type doping. The predicted transmission enhancement was verified by confocal scanning optical microscopy performed at 365 nm. The quality of the nanogrids fabricated by electron-beam lithography was verified by near-field scanning optical microscopy and scanning electron microscopy. Based on the results, the pitch and gap of the nanogrids can be optimized for the best trade-off between electrical conductivity and optical transmission at different wavelengths. Based on different cutoff wavelengths, the nanogrids can also double as a filter to render photodetectors solar-blind. (C) 2011 Optical Society of America
Journal Title
Optics Letters
Volume
36
Issue/Number
18
Publication Date
1-1-2011
Document Type
Article
Language
English
First Page
3663
Last Page
3665
WOS Identifier
ISSN
0146-9592
Recommended Citation
"Al nanogrid electrode for ultraviolet detectors" (2011). Faculty Bibliography 2010s. 1251.
https://stars.library.ucf.edu/facultybib2010/1251
Comments
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