A plasmonic enhanced photodetector based on silicon nanocrystals obtained through laser ablation
Author
Alkis, S.
Oruç, F. B.
Ortaç, B.
Koşger, A. C.
Okyay, Ali Kemal
Date
2012-10-18Source Title
Journal of Optics (United Kingdom)
Print ISSN
2040-8978
Publisher
Institute of Physics Publishing
Volume
14
Issue
12
Pages
125001-1 - 125001-5
Language
English
Type
ArticleItem Usage Stats
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Abstract
We present a proof-of-concept photodetector which is sensitive in the visible spectrum. Silicon nanocrystals (Si-NCs) obtained by laser ablation are used as the active absorption region. Si-NC films are formed from a polymeric dispersion. The films are sandwiched between thin insulating films to reduce the electrical leakage current. Furthermore, Ag nanoparticles are integrated with the photodetector to enhance the visible response using plasmonic effects. The measured photocurrent is resonantly enhanced, which is explained in terms of enhanced local fields caused by localized plasmons. The UV-vis spectrum of Ag nanoparticles is also measured to verify the resonance.
Keywords
Laser ablationPhotodetector
Semiconductor nanocrystals
Thin film
Active-absorption
Ag nanoparticle
Electrical leakage
Enhanced local fields
Plasmonic
Polymeric dispersions
Proof of concept
Semiconductor nanocrystals
Silicon nanocrystals
Thin insulating film
UV-Vis spectrum
Visible spectra
Laser ablation
Lasers
Nanoparticles
Photodetectors
Photons
Plasmons
Polymeric films
Silicon
Thin films
Silver