Tunnel field-effect transistors for sensitive terahertz detection

Gayduchenko, Igor; Xu, Shuigang; Alymov, Georgy; Moskotin, Maxim; Tretyakov, Ivan; Taniguchi, Takashi; Watanabe, Kenji; Goltsman, Gregory; Geim, Andre K.; Fedorov, Georgy; Svintsov, Dmitry; Bandurin, Denis A.

doi:10.48550/arxiv.2010.03040

Cited by 1 publication

(2 citation statements)

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“…The spatial quantum number is conserved in the timeevolution but the mode amplitude decays in time. Our choice, instead, is more appropriate for BCs such as (48) and (49), which are local in space and break the translational invariance of the continuity and Euler equations, but oscillate in time with a given frequency. The mode amplitude is then forced to oscillate periodically, but it decays in space away from the point where the driving is applied.…”

Section: Plasma Waves a Freely-propagating Plasma Wavesmentioning

confidence: 99%

“…Double-layer setups support intra-and inter-layer plasmon modes [38][39][40] and feature interesting interplay between plasma-wave propagation [41] and inter-layer electron tunneling or scattering. [42][43][44][45][46] Electron tunneling in multi-layer graphene [47,48] or in gate-defined lateral tunnel junctions in BLG [49] can also be exploited to achieve photodetection mechanisms different from the DS scheme.…”

Section: Introductionmentioning

confidence: 99%

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Microscopic theory of plasmon-enabled resonant terahertz detection in bilayer graphene

Tomadin,

Carrega,

Polini

2020

Preprint

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The electron gas hosted in a two-dimensional solid-state matrix, such as a quantum well or a twodimensional van der Waals heterostructure, supports the propagation of plasma waves. Nonlinear interactions between plasma waves, due to charge conservation and current convection, generate a constant density gradient which can be detected as a dc potential signal at the boundaries of the system. This phenomenon is at the heart of a plasma-wave photodetection scheme which was first introduced by Dyakonov and Shur for electronic systems with a parabolic dispersion and then extended to the massless Dirac fermions in graphene. In this work, we develop the theory of plasmawave photodetection in bilayer graphene, which has the peculiarity that the dispersion relation depends locally and dynamically on the intensity of the plasma wave. In our analysis, we show how quantum capacitance effects, arising from the local fluctuations of the electronic dispersion, modify the intensity of the photodetection signal. An external electrical bias, e.g. induced by top and bottom gates, can be used to control the strength of the quantum capacitance corrections, and thus the photoresponse.

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Section: Plasma Waves a Freely-propagating Plasma Wavesmentioning

confidence: 99%