Quantum dots-based all-optical-readout middle-far-infrared imaging

Gang Chen, Rainer Martini

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A quantum dot (QD) middle-far-infrared (MFIR) detection and imaging approach based on all-optical-readout (AORO) is proposed. Using the intersubband (ISB) optical transition to change the interband (IB) absorption, it converts the ISB MFIR signal into the IB near-infrared signal. It might overcome the problems in the electrical readout infrared detection and imaging, such as dark current, low-temperature operation, low resolution, and vulnerability to the high radiation intensity. Based on the In0.5Ga0.5As GaAs lens-shaped QD structure, our calculation shows the potential of this AORO approach for the MFIR detection and high-resolution imaging, the potential for room-temperature operation, and the ability for frequency selectivity and spectrum scanning.

Original languageEnglish
Article number5716914
Pages (from-to)285-292
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume47
Issue number3
DOIs
StatePublished - 2011

Keywords

  • Infrared detectors
  • infrared imaging
  • optical modulation
  • quantum dots

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