LSPR enhanced MSM UV photodetectors
Date
2012-10-18
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Source Title
Nanotechnology
Print ISSN
0957-4484
Electronic ISSN
Publisher
IOP Publishing
Volume
23
Issue
44
Pages
444010-1 - 444010-5
Language
English
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Abstract
We fabricated localized surface plasmon resonance enhanced UV photodetectors on MOCVD grown semi-insulating GaN. Plasmonic resonance in the UV region was attained using 36nm diameter Al nanoparticles. Extinction spectra of the nanoparticles were measured through spectral transmission measurements. A resonant extinction peak around 300nm was obtained with Al nanoparticles. These particles gave rise to enhanced absorption in GaN at 340nm. Spectral responsivity measurements revealed an enhancement factor of 1.5. These results provided experimental verification for obtaining field enhancement by using Al nanoparticles on GaN.
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Keywords
Al-nanoparticles , Enhanced absorption , Enhancement factor , Experimental verification , Extinction spectra , Field enhancement , Localized surface plasmon resonance , Plasmonic , Semi-insulating GaN , Spectral responsivity , Spectral transmission , UV photodetectors , UV region , Aluminum , Gallium nitride , Photodetectors , Photons , Surface plasmon resonance , Nanoparticles