Sensitive mid-infrared detection in wide-bandgap semiconductors using extreme non-degenerate two-photon absorption

    Authors

    D. A. Fishman; C. Cirloganu; S. Webster; L. A. Padilha; M. Monroe; D. J. Hagan;E. W. Van Stryland

    Comments

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    Abbreviated Journal Title

    Nat. Photonics

    Keywords

    OPTICAL NONLINEARITIES; ENHANCEMENT; MICROCAVITIES; CHROMOPHORES; NANOCAVITY; LASERS; GAAS; Optics; Physics, Applied

    Abstract

    Identifying strong and fast nonlinearities for today's photonic applications is an ongoing effort(1). Materials(2-5) and devices(6-9) are typically sought to achieve increasing nonlinear interactions. We report large enhancement of two-photon absorption through intrinsic resonances using extremely non-degenerate photon pairs. We experimentally demonstrate two-photon absorption enhancements by factors of 100-1,000 over degenerate two-photon absorption in direct-bandgap semiconductors. This enables gated detection of sub-bandgap and sub-100 pJ mid-infrared radiation using large-bandgap detectors at room temperature. Detection characteristics are comparable in performance to liquid-nitrogen-cooled HgCdTe (MCT) detectors. The temporal resolution of this gated detection by two-photon absorption is determined by the gating pulse duration.

    Journal Title

    Nature Photonics

    Volume

    5

    Issue/Number

    9

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    561

    Last Page

    565

    WOS Identifier

    WOS:000294412700016

    ISSN

    1749-4885

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