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Title: Photocurrent spectrum study of a quantum dot single-photon detector based on resonant tunneling effect with near-infrared response

We present the photocurrent spectrum study of a quantum dot (QD) single-photon detector using a reset technique which eliminates the QD's “memory effect.” By applying a proper reset frequency and keeping the detector in linear-response region, the detector's responses to different monochromatic light are resolved which reflects different detection efficiencies. We find the reset photocurrent tails up to 1.3 μm wavelength and near-infrared (∼1100 nm) single-photon sensitivity is demonstrated due to interband transition of electrons in QDs, indicating the device a promising candidate both in quantum information applications and highly sensitive imaging applications operating in relative high temperatures (>80 K).
Authors:
 [1] ;  [2] ;  [3] ; ;  [4] ; ; ; ;  [1]
  1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083 (China)
  2. (China)
  3. State Key Laboratory of Surface Physics and Institute of Advanced Materials, Fudan University, Shanghai 200433 (China)
  4. Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241 (China)
Publication Date:
OSTI Identifier:
22311356
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DETECTION; EFFICIENCY; ENERGY-LEVEL TRANSITIONS; EQUIPMENT; MONOCHROMATIC RADIATION; NEAR INFRARED RADIATION; PHOTODETECTORS; PHOTONS; QUANTUM DOTS; QUANTUM INFORMATION; SENSITIVITY; SPECTRA; TUNNEL EFFECT; VISIBLE RADIATION; WAVELENGTHS