Optimization of Blazed Quantum Grid Infrared Photodetectors

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In a quantum grid infrared photodetector (QGIP), the active multiple quantum well material is patterned into a grid structure. The purposes of the grid are on the one hand to create additional lateral electron confinement and on the other to convert part of the incident light into parallel propagation. With these two unique functions, a QGIP allows intersubband transition to occur in all directions. In this work, we focused on improving the effectiveness of a QGIP in redirecting the propagation of light using a blazed structure. The optimization of the grid parameters in terms of the blaze angle and the ... continued below

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12 p.

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Chen, C.J.; Choi, K.K.; Jiang, M.; Rokhinson, L.P.; Tamir, T.; Tsui, D.C. et al. July 7, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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In a quantum grid infrared photodetector (QGIP), the active multiple quantum well material is patterned into a grid structure. The purposes of the grid are on the one hand to create additional lateral electron confinement and on the other to convert part of the incident light into parallel propagation. With these two unique functions, a QGIP allows intersubband transition to occur in all directions. In this work, we focused on improving the effectiveness of a QGIP in redirecting the propagation of light using a blazed structure. The optimization of the grid parameters in terms of the blaze angle and the periodicity was performed by numerical simulation using the modal transmission-line theory and verified by experiment. With a blazed structure, the sensitivity of a QGIP can be improved by a factor of 1.8 compared with a regular QGIP with rectangular profiles.

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12 p.

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OSTI as DE00008782

Medium: P; Size: 12 pages

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  • Journal Name: Applied Physics Letters; Other Information: Submitted to Applied Physics Letters

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  • Report No.: SAND99-1726J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 8782
  • Archival Resource Key: ark:/67531/metadc791631

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 7, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 6, 2017, 8:06 p.m.

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Chen, C.J.; Choi, K.K.; Jiang, M.; Rokhinson, L.P.; Tamir, T.; Tsui, D.C. et al. Optimization of Blazed Quantum Grid Infrared Photodetectors, article, July 7, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc791631/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.