title: Self-quenching InGaAs/InP single photon avalanche detector utilizing zinc diffusion rings.
abstract: InGaAs single photon avalanche detectors have previously been fabricated with a negative-feedback mechanism, which allows for free-running Geiger-mode operation and improves the signal noise. To reduce the dark count and improve the detection efficiency, zinc diffusion is necessary to define the p-i-n junction and separate the high-field region from any mesa surface. Here, we demonstrate the benefits of a simple Zn-diffused geometry, yielding 1550 nm single-photon detection efficiencies of 20% with a dark count rate of 8 kHz at 140 K for a 22 μm diameter device.
authors.affiliation: Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive M/C 0409, La Jolla, CA 92093, USA. jcheng@logroup.ucsd.edu
authors.forename: James
authors.initials: J
authors.lastname: Cheng
authors.forename: Sifang
authors.initials: S
authors.lastname: You
authors.forename: Samia
authors.initials: S
authors.lastname: Rahman
authors.forename: Yu-Hwa
authors.initials: YH
authors.lastname: Lo