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- W2327208525 abstract "New applications in the realms of terahertz (THz) technology require versatile adaptive optics and powerful modulation techniques. Semiconductors have proven to provide fast all-optical terahertz wave modulation over a wide frequency band. We show that the attenuation and modulation depth in optically driven silicon modulators can be significantly enhanced by deposition of graphene on silicon (GOS). We observed a wide-band tunability of the THz transmission in a frequency range from 0.2 to 2 THz and a maximum modulation depth of 99%. The maximum difference between the transmission through silicon and GOS is Δt = 0.18 at a low photodoping power of 40 mW. At higher modulation power, the enhancement decreased due to charge carrier saturation. We developed a semianalytical band structure model of the graphene-silicon interface to describe the observed attenuation and modulation depth in GOS." @default.
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- W2327208525 date "2012-09-26" @default.
- W2327208525 modified "2023-10-18" @default.
- W2327208525 title "Spectrally Wide-Band Terahertz Wave Modulator Based on Optically Tuned Graphene" @default.
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- W2327208525 doi "https://doi.org/10.1021/nn303392s" @default.
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