High-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetectors

Ayman Karar*, Narottam Das, Chee Leong Tan, Kamal Alameh, Yong Tak Lee, Fouad Karouta

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    29 Citations (Scopus)

    Abstract

    We report the experimental characterization of high-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetector (MSM-PD) employing metal nano-gratings. Both the geometry and light absorption near the designed wavelength are theoretically and experimentally investigated. The measured photocurrent enhancement is 4-times in comparison with a conventional single-slit MSM-PD. We observe reduction in the responsivity as the bias voltage increases and the input light polarization varies. Our experimental results demonstrate the feasibility of developing a high-responsivity, low bias-voltage high-speed MSM-PD.

    Original languageEnglish
    Article number133112
    JournalApplied Physics Letters
    Volume99
    Issue number13
    DOIs
    Publication statusPublished - 26 Sept 2011

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