Plasmon absorption in grating-coupled InP HEMT and graphene sheet for tunable THz detection

Nima Nader Esfahani; R. E. Peale; Christopher J. Fredricksen; Justin W. Cleary; Joshua Hendrickson; Walter R. Buchwald; Ben D. Dawson; M. Ishigami

doi:10.1117/12.907938

27 February 2012 Plasmon absorption in grating-coupled InP HEMT and graphene sheet for tunable THz detection

Nima Nader Esfahani, R. E. Peale, Christopher J. Fredricksen, Justin W. Cleary, Joshua Hendrickson, Walter R. Buchwald, Ben D. Dawson, M. Ishigami

Author Affiliations +

Proceedings Volume 8261, Terahertz Technology and Applications V; 82610E (2012) https://doi.org/10.1117/12.907938
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

Tunable resonant absorption by plasmons in the two-dimensional electron gas (2DEG) of grating-gated InP- and Graphene-based HEMTs are investigated. Fourier-spectrometer-obtained transmission resonances are observed over a wide spectral band from mm wavelengths to THz frequencies. These results are found to be consistent with grating period and 2DEG sheet charge density dependent theoretical calculations. The temperature dependence of these transmission resonances as a function of temperature is also reported for both devices. Such devices have potential as a chip-scale frequency-agile THz imaging spectrometers for man-portable or space-based spectral-sensing applications.

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Nima Nader Esfahani, R. E. Peale, Christopher J. Fredricksen, Justin W. Cleary, Joshua Hendrickson, Walter R. Buchwald, Ben D. Dawson, and M. Ishigami "Plasmon absorption in grating-coupled InP HEMT and graphene sheet for tunable THz detection", Proc. SPIE 8261, Terahertz Technology and Applications V, 82610E (27 February 2012); https://doi.org/10.1117/12.907938

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