Quantum dot single-photon switches of resonant tunneling current for discriminating-photon-number detection

Scientific Reports
Qianchun WengWei Lu

Abstract

Low-noise single-photon detectors that can resolve photon numbers are used to monitor the operation of quantum gates in linear-optical quantum computation. Exactly 0, 1 or 2 photons registered in a detector should be distinguished especially in long-distance quantum communication and quantum computation. Here we demonstrate a photon-number-resolving detector based on quantum dot coupled resonant tunneling diodes (QD-cRTD). Individual quantum-dots (QDs) coupled closely with adjacent quantum well (QW) of resonant tunneling diode operate as photon-gated switches- which turn on (off) the RTD tunneling current when they trap photon-generated holes (recombine with injected electrons). Proposed electron-injecting operation fills electrons into coupled QDs which turn "photon-switches" to "OFF" state and make the detector ready for multiple-photons detection. With proper decision regions defined, 1-photon and 2-photon states are resolved in 4.2 K with excellent propabilities of accuracy of 90% and 98% respectively. Further, by identifying step-like photon responses, the photon-number-resolving capability is sustained to 77 K, making the detector a promising candidate for advanced quantum information applications where photon-number-stat...Continue Reading

References

Mar 24, 2005·Physical Review Letters·J C BlakesleyD A Ritchie
Dec 8, 2007·Science·Jeremy L O'Brien
Mar 6, 2010·Nature·T D LaddJ L O'Brien
Aug 12, 2010·Nano Letters·David BitauldAndrea Fiore

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Citations

Dec 21, 2017·Scientific Reports·Ramón Bernardo-GavitoRobert J Young
Nov 14, 2018·Reports on Progress in Physics·Fulvio FlaminiFabio Sciarrino
Jul 28, 2016·Nanotechnology·Andreas PfenningLukas Worschech
Aug 23, 2018·Nano Letters·Wenjin LuoWei Lu

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