The photoresponse of a two-dimensional electron gas at the second harmonic of the cyclotron resonance

Abstract

Terahertz spectroscopy experiments at magnetic fields and low temperatures were carried out on samples of different gate shapes processed on a high electron mobility GaAs/AlGaAs heterostructure. For a given radiation frequency, multiple magnetoplasmon resonances were observed with a dispersion relation described within a local approximation of the magnetoconductivity tensor. The second harmonic of the cyclotron resonance was observed and its appearance was interpreted as resulting from a high frequency, inhomogeneous electromagnetic field on the border of a two-dimensional electron gas with a metallic gate and/or an ohmic contact.

arXiv comment5 pages, 3 figures

References in corpus (7)

• Observation of a cyclotron harmonic spike in microwave-induced resistances in ultraclean GaAs/AlGaAs quantum wells
• Photovoltaic effect in a gated two-dimensional electron gas in magnetic field
• Bernstein modes and giant microwave response of two-dimensional electron system
• Microwave photoresistance in a two-dimensional electron gas with separated Landau levels
• Non-linear response of a high mobility two-dimensional electron system near the second harmonic of the cyclotron resonance
• Phase of phonon-induced resistance oscillations in a high-mobility two-dimensional electron gas
• Plasmonic terahertz detectors based on a high-electron mobility GaAs/AlGaAs heterostructure

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• Ballistic flow of two-dimensional electrons in a magnetic field
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• Low-energy excitations in multiple modulation-doped CdTe/(CdMg)Te quantum wells
• Ballistic-hydrodynamic phase transition in flow of two-dimensional electrons
• Tunable viscous layers in Corbino geometry using density junctions