A plasmonic enhanced photodetector based on silicon nanocrystals obtained through laser ablation

Date
2012-10-18
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Journal of Optics (United Kingdom)
Print ISSN
2040-8978
Electronic ISSN
Publisher
Institute of Physics Publishing
Volume
14
Issue
12
Pages
125001-1 - 125001-5
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
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.

Course
Other identifiers
Book Title
Keywords
Laser ablation, Photodetector, 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
Citation
Published Version (Please cite this version)