Quantum-dot IR photodetectors get 'hotter'

Manijeh Razeghi*

*Corresponding author for this work

Research output: Contribution to specialist publicationArticle


The improvements in the operating temperature and quantum efficiency of quantum-dot infrared photodetectors (QDIPs) have encouraged new imaging techniques that can be used in medical and biological imaging, environmental and chemical monitoring from space. Researchers are developing high-performance imagers using nanotechnology to form quantum dots, which can operate at room temperatures effectively. The QDIP device comprises 25 stacks of a hybrid structure of indium arsenide (InAs) quantum dots and an indium gallium arsenide (InGaAs) quantum well, with aluminum indium arsenide (AlInAs) as a barrier. An atomic-force microscope and a scanning-electron microscope are used to measure the structural properties of the quantum dots, such as size and density, which enhance the capability of QDIPs significantly.

Original languageEnglish (US)
Number of pages2
Specialist publicationLaser Focus World
StatePublished - Dec 2007

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Marketing


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