English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report on a gated single-photon detector based on InGaAs/InP avalanchephotodiodes (APDs) with a single-photon detection efficiency exceeding 55% at1550 nm. Our detector is gated at 1 GHz and employs the self-differencingtechnique for gate transient suppression. It can operate nearly dead time free,except for the one clock cycle dead time intrinsic to self-differencing, and wedemonstrate a count rate of 500 Mcps. We present a careful analysis of theoptimal driving conditions of the APD measured with a dead time free detectorcharacterization setup. It is found that a shortened gate width of 360 pstogether with an increased driving signal amplitude and operation at highertemperatures leads to improved performance of the detector. We achieve anafterpulse probability of 7% at 50% detection efficiency with dead time freemeasurement and a record efficiency for InGaAs/InP APDs of 55% at an afterpulseprobability of only 10.2% with a moderate dead time of 10 ns.

GHz-gated InGaAs/InP single-photon detector with detection efficiency exceeding 55% at 1550 nm