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...

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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
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description 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.
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subjects Arrays
Cross talk
Nanocomposites
Nanomaterials
Nanostructure
Photodetectors
Quantum dots
Spatial resolution
title Exploring spatial resolution in high-sensitivity nanogap quantum dot photodetectors
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