http://www.cnr.it/ontology/cnr/individuo/prodotto/ID273506

Spectroscopic study of plasma wave resonances of a two-dimensional electron gas in a microcavity at low temperatures (Articolo in rivista)

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Spectroscopic study of plasma wave resonances of a two-dimensional electron gas in a microcavity at low temperatures (Articolo in rivista) (literal)

Anno

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Alternative label

Di Gaspare, A [1]; Giliberti, V [1,2] ; Giovine, E [1]; Evangelisti, F [3]; Ortolani, M [1,2] (2013)
Spectroscopic study of plasma wave resonances of a two-dimensional electron gas in a microcavity at low temperatures
in Journal of optics (Print); IOP PUBLISHING LTD, BRISTOL BS1 6BE (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Di Gaspare, A [1]; Giliberti, V [1,2] ; Giovine, E [1]; Evangelisti, F [3]; Ortolani, M [1,2] (literal)

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[1] CNR Inst Photon & Nanotechnol, I-00156 Rome, Italy [2] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy [3] Roma Tre Univ, Dept Sci, I-00146 Rome, Italy (literal)

Titolo

Spectroscopic study of plasma wave resonances of a two-dimensional electron gas in a microcavity at low temperatures (literal)

Abstract

The channel of a high electron mobility transistor can work as a resonant microcavity for plasma waves, provided that the plasmon decay length is much larger than the cavity length. We have performed a spectroscopic study in the 0.15-0.4 THz range of the power absorbed by the micrometric channel of a two-dimensional electron gas (2DEG) transistor, where the active layer is formed by a remotely doped AlGaAs/InGaAs/AlGaAs quantum well where the electron mobility increases with decreasing temperature. The radiation emitted by a tunable frequency-multiplied THz oscillator was coupled to the cavity by an integrated lens-antenna optical system. The rectified signal is measured as a function of frequency and a strong increase upon cooling to 10 K is found at specific radiation frequencies, indicating the formation of standing plasma waves in the microcavity formed by the channel. (literal)

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