title: Exploring spatial resolution in high-sensitivity nanogap quantum dot photodetectors.
abstract: 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.
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195-2500, USA.
authors.forename: Ludan
authors.initials: L
authors.lastname: Huang
authors.forename: Matthew
authors.initials: M
authors.lastname: Strathman
authors.forename: Lih Y
authors.initials: LY
authors.lastname: Lin