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- W1964930740 abstract "We have proposed a terahertz (THz) emitter utilizing two-dimensional plasmons (2DPs) in a super-grating dual-gate (SGG) high electron mobility transistor (HEMT). The plasmon under each grating gate has a unique feature that its resonant frequency is determined by the plasma-wave velocity over the gate length. Since the drain bias voltage causes a linear potential slope from the source to drain area, the sheet electron densities in periodically distributed 2DP cavities are dispersed. As a result, all the resonant frequencies are dispersed and undesirable spectral broadening occurs. A SGG structure can compensate for the sheet electron density distribution by modulating the grating dimension. The finite difference time domain simulation confirms its spectral narrowing effect. Within a wide detuning range for the gate and drain bias voltages giving a frequency shifting of ±0.5THz from an optimum condition, the SGG structure can preserve the spectral narrowing effect." @default.
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- W1964930740 date "2009-01-01" @default.
- W1964930740 modified "2023-10-16" @default.
- W1964930740 title "Spectral Narrowing Effect of a Novel Super-Grating Dual-Gate Structure for Plasmon-Resonant Terahertz Emitter" @default.
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- W1964930740 doi "https://doi.org/10.1587/transele.e92.c.696" @default.
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