AlGaN/InGaN Photocathode Development

Buckley, J H; Leopold, D J

doi:10.1063/1.3076824

Title: AlGaN/InGaN Photocathode Development

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Abstract

An increase in quantum efficiency in photodetectors could result in a proportional reduction in the area of atmospheric Cherenkov telescopes and an even larger reduction in cost. We report on the development of high quantum efficiency, high gain, UV/blue photon-counting detectors based on AlGaN/InGaN photocathode heterostructures grown by molecular beam epitaxy. This research could eventually result in nearly ideal light detectors with a number of distinct advantages over existing technologies for numerous applications in high-energy physics and particle astrophysics. Potential advantages include much lower noise detection, better stability and radiation resistance than other cathode structures, high VUV sensitivity and very low radioactive background levels for deep underground experiments, and high detection efficiency for the detection of individual VUV-visible photons. We are also developing photocathodes with intrinsic gain, initially improving the detection efficiency of hybrid semiconductor-vacuum tube devices and eventually leading to a new type of all-solid-state photomultiplier device.

Authors:

Buckley, J H; Leopold, D J ^[1]

Department of Physics and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130 (United States)

Publication Date:: Wed Dec 24 00:00:00 EST 2008

OSTI Identifier:: 21255202

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1085; Journal Issue: 1; Conference: 4. international meeting on high energy gamma-ray astronomy, Heidelberg (Germany), 7-11 Jul 2008; Other Information: DOI: 10.1063/1.3076824; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ASTROPHYSICS; CHERENKOV COUNTERS; COST; EQUIPMENT; FAR ULTRAVIOLET RADIATION; HIGH ENERGY PHYSICS; MOLECULAR BEAM EPITAXY; PHOTOCATHODES; PHOTODETECTORS; PHOTOMULTIPLIERS; PHOTONS; QUANTUM EFFICIENCY; SEMICONDUCTOR MATERIALS; SENSITIVITY; TELESCOPES; UNDERGROUND FACILITIES

Citation Formats


                    Buckley, J H, and Leopold, D J. AlGaN/InGaN Photocathode Development.  United States: N. p., 2008. 
        Web.  doi:10.1063/1.3076824.

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                    Buckley, J H, & Leopold, D J. AlGaN/InGaN Photocathode Development.  United States.  https://doi.org/10.1063/1.3076824

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                    Buckley, J H, and Leopold, D J. 2008.  
        "AlGaN/InGaN Photocathode Development".  United States.  https://doi.org/10.1063/1.3076824.

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@article{osti_21255202,

  title        = {AlGaN/InGaN Photocathode Development},

  author       = {Buckley, J H and Leopold, D J},

  abstractNote = {An increase in quantum efficiency in photodetectors could result in a proportional reduction in the area of atmospheric Cherenkov telescopes and an even larger reduction in cost. We report on the development of high quantum efficiency, high gain, UV/blue photon-counting detectors based on AlGaN/InGaN photocathode heterostructures grown by molecular beam epitaxy. This research could eventually result in nearly ideal light detectors with a number of distinct advantages over existing technologies for numerous applications in high-energy physics and particle astrophysics. Potential advantages include much lower noise detection, better stability and radiation resistance than other cathode structures, high VUV sensitivity and very low radioactive background levels for deep underground experiments, and high detection efficiency for the detection of individual VUV-visible photons. We are also developing photocathodes with intrinsic gain, initially improving the detection efficiency of hybrid semiconductor-vacuum tube devices and eventually leading to a new type of all-solid-state photomultiplier device.},

  doi          = {10.1063/1.3076824},

  url          = {https://www.osti.gov/biblio/21255202},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1085,

  place        = {United States},

  year         = {Wed Dec 24 00:00:00 EST 2008},

  month        = {Wed Dec 24 00:00:00 EST 2008}

}

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