A plasmonic enhanced photodetector based on silicon nanocrystals obtained through laser ablation
Oruç, F. B.
Koşger, A. C.
Okyay, Ali Kemal
Journal of Optics (United Kingdom)
Institute of Physics Publishing
125001-1 - 125001-5
Item Usage Stats
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.
Enhanced local fields
Proof of concept
Thin insulating film