Light coupling mechanism of quantum grid infrared photodetectors

J. Mao, Amlan Majumdar, K. K. Choi, D. C. Tsui, Kok-Ming Leung, C. H. Lin, T. Tamir, G. A. Vawter

    Research output: Contribution to journalArticle

    Abstract

    Rigorous electromagnetic modeling based on a modal solution of the pertinent boundary-value problem was performed to study the light coupling mechanism in quantum grid infrared photodetectors with lamellar patterns. Our theory shows that vertical field component and absorption quantum efficiency η can be strongly enhanced by judiciously adjusting the width w of individual grid lines. This enhancement is further increased if the top of the grid lines is covered by metal, which behave as a collection of dipole scatterers. We have experimentally verified the dipole scattering characteristics with different w, and found that the variation of η agrees very well with the theory. We also found that, as expected, the conductivity of the metal strips affects η significantly due to internal dissipation.

    Original languageEnglish (US)
    Pages (from-to)868-870
    Number of pages3
    JournalApplied Physics Letters
    Volume80
    Issue number5
    DOIs
    StatePublished - Feb 4 2002

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    photometers
    grids
    dipoles
    metal strips
    scattering
    boundary value problems
    quantum efficiency
    dissipation
    adjusting
    electromagnetism
    conductivity
    augmentation
    metals

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Mao, J., Majumdar, A., Choi, K. K., Tsui, D. C., Leung, K-M., Lin, C. H., ... Vawter, G. A. (2002). Light coupling mechanism of quantum grid infrared photodetectors. Applied Physics Letters, 80(5), 868-870. https://doi.org/10.1063/1.1445484

    Light coupling mechanism of quantum grid infrared photodetectors. / Mao, J.; Majumdar, Amlan; Choi, K. K.; Tsui, D. C.; Leung, Kok-Ming; Lin, C. H.; Tamir, T.; Vawter, G. A.

    In: Applied Physics Letters, Vol. 80, No. 5, 04.02.2002, p. 868-870.

    Research output: Contribution to journalArticle

    Mao, J, Majumdar, A, Choi, KK, Tsui, DC, Leung, K-M, Lin, CH, Tamir, T & Vawter, GA 2002, 'Light coupling mechanism of quantum grid infrared photodetectors', Applied Physics Letters, vol. 80, no. 5, pp. 868-870. https://doi.org/10.1063/1.1445484
    Mao J, Majumdar A, Choi KK, Tsui DC, Leung K-M, Lin CH et al. Light coupling mechanism of quantum grid infrared photodetectors. Applied Physics Letters. 2002 Feb 4;80(5):868-870. https://doi.org/10.1063/1.1445484
    Mao, J. ; Majumdar, Amlan ; Choi, K. K. ; Tsui, D. C. ; Leung, Kok-Ming ; Lin, C. H. ; Tamir, T. ; Vawter, G. A. / Light coupling mechanism of quantum grid infrared photodetectors. In: Applied Physics Letters. 2002 ; Vol. 80, No. 5. pp. 868-870.
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    AU - Leung, Kok-Ming

    AU - Lin, C. H.

    AU - Tamir, T.

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