High-efficiency single-photon detectors

Radhika Rangarajan, Joseph B. Altepeter, Evan R. Jeffrey, Micah J.A. Stoutimore, Nicholas A. Peters, Onur Hosten, Paul G. Kwiat

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs) are high-efficiency single-photon detectors which have multi-photon counting capability. While both the VLPCs and the SSPMs have inferred internal quantum efficiencies above 93%, the actual measured values for both the detectors were in fact limited to less than 88%, attributed to in-coupling losses. We are currently improving this overall detection efficiency via a) custom anti-reflection coating the detectors and the in-coupling fibers, b) implementing a novel cryogenic design to reduce transmission losses and, c) using low-noise electronics to obtain a better signal-to-noise ratio.

Original languageEnglish (US)
Title of host publicationAdvanced Photon Counting Techniques
StatePublished - 2006
EventAdvanced Photon Counting Techniques - Boston, MA, United States
Duration: Oct 1 2006Oct 3 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherAdvanced Photon Counting Techniques
Country/TerritoryUnited States
CityBoston, MA


  • SSPM
  • Single-photon detectors
  • VLPC

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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