Exploring spatial resolution in high-sensitivity nanogap quantum dot photodetectors

We propose a new approach to experimentally determine the spatial resolution of nanogap quantum dot (QD) photodetectors consist of solution-processed QDs. Cross talk between a pair of closely positioned QD photodetectors was measured. Devices with 200 nm spacing exhibit low crosstalk of 8.4%. A sing...

Full description

Saved in:
Bibliographic Details
Published in:Optics letters 2012-08, Vol.37 (15), p.3144-3146
Main Authors: Huang, Ludan, Strathman, Matthew, Lin, Lih Y
Format: Article
Language:English
Subjects:
Arrays
Cross talk
Nanocomposites
Nanomaterials
Nanostructure
Photodetectors
Quantum dots
Spatial resolution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We propose a new approach to experimentally determine the spatial resolution of nanogap quantum dot (QD) photodetectors consist of solution-processed QDs. Cross talk between a pair of closely positioned QD photodetectors was measured. Devices with 200 nm spacing exhibit low crosstalk of 8.4%. A single QD photodetector also shows high sensitivity, with a lowest detectable optical intensity of 95.3 fW/μm2 achieved. The results show the potential of nanogap QD photodetectors for applications in high-density imaging/sensing arrays.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.003144