Non-linear Doppler shift of the plasmon resonance in a grating-coupled drifting 2DEG

Tyson, R.; Stuart, R. J.; Hughes, H. P.; Frost, J. E. F.; Ritchie, D. A.; Jones, G. A. C.; Shearwood, C.

doi:10.1007/bf02146254

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…Channels in the presence of drift have also been studied experimentally, and changes of the dispersion relation due to the Doppler term k z v 0 were identified. 24,25 Deriving Eq. (6), we ignored electron collisions and diffusion which implies lowtemperature operation.…”

Section: Two-dimensional Channelsmentioning

confidence: 99%

“…xa j z¼0 ¼ 0: (25) This is the only electrodynamic boundary condition given for a conducting plane, and the relationships between the other ac quantities, constituting the orthogonality condition Eq. xb j z¼0 and integrating the result over the transverse coordinate x, we obtained an infinite system of equations in the form:…”

Section: B Interface Between An Electron Channel and A Conducting Planementioning

confidence: 99%

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Amplifying mirrors for terahertz plasmons

Sydoruk

Syms

Solymár

2012

Journal of Applied Physics

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Semiconductor plasmons have long held out a promise for terahertz generation, but competitive plasmonic mechanisms have yet to be found. Here, we introduce amplifying terahertz mirrors: planar interfaces for two-dimensional electron channels that amplify plasmons in the presence of electron drift. In contrast to existing formulations, we develop a rigorous mode matching technique that takes the complete mode spectrum into account. Mirrors are characterized by plasmon reflection and transmission coefficients whose values can increase with drift. Amplitude and power coefficients are determined, and conditions are found for their values to exceed unity. Resonators based on different combinations of amplifying mirrors are investigated, and an asymmetric configuration (consisting of two different electron channels confined between conducting planes) whose roundtrip gain can exceed unity is identified. The unusual conditions needed for oscillation are examined in detail and the general advantages of asymmetric arrangements are highlighted. Finally, the potential of mode matching as a universal tool for plasmonics is discussed.

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Section: Two-dimensional Channelsmentioning

confidence: 99%

Section: B Interface Between An Electron Channel and A Conducting Planementioning

confidence: 99%

Amplifying mirrors for terahertz plasmons

Sydoruk

Syms

Solymár

2012

Journal of Applied Physics

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“…υ the plasmon frequencies demonstrate a linear Doppler shift [15,16]. In this regime, near the plasmon resonance the resonant Fourier harmonics q E ± are concentrated in one of the two split plasmon modes: Physical model developed above explains qualitatively many characteristic features of the dc photoresponse in the grating-gated GaAs/AlGaAs FET measured in Refs.…”

Section: Theory Of the DC Photoresponse In The Grating-gated Fetmentioning

confidence: 84%

Plasmon Enhanced Electron Drag and Terahertz Photoconductance in a Grating-Gated Field-Effect Transistor with Two-Dimensional Electron Channel

Aǐzin¹

2006

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Public Reporting Burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. PLASMON ENHANCED ELECTRON DRAG AND TERAHERTZ PHOTOCONDUCTANCE IN A GRATING-GATED FIELD-EFFECT TRANSISTOR WITH TWO-DIMENSIONAL ELECTRON CHANNELReport Title ABSTRACTThe specific goal for the 1st year was to develop a physical model of the interaction between THz EM radiation and 2D electron channel of the grating-gated field-effect transistor. This physical model has been developed. The model predicts and allows to calculate photo induced dc correction to the sourse-drain voltage measured in experiment. Calculations demonstrate that dc photovoltage has resonant peaks at plasmon frequencies. Dependence of the peak positions, shape, and amplitude on the frequency, gate voltage, temperature, and FET geometry has been found. Distributions of the non-equilibrium electron density, electric fields, and currents in the 2D channel at resonance have been calculated. The results are in very good qualitative agreement with experiment. Plans for the coming year include numerical simulation of the dc photoresponce for various system designs in order to optimize device parameters and assess its potential as a THz detector.

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“…where ( ) sc | 0=0 is the plasmon frequency in the absence of the electron drift. In this model, the splitting is determined by the Doppler shift, 0 (see, e.g., [4,46,47]). For the estimations, we used the expression of sc ( )| 0=0 in the case of 2D plasmons gated by the ideal metallic mirror:…”

Section: Effect Of the Electron Drift On The Spectral Characteristicsmentioning

confidence: 99%

Theory of Detection of Terahertz Radiation in Hybrid Plasmonic Structures with Drifting Electron Gas

Lyaschuk¹,

Korotyeyev²

2017

Ukr. J. Phys.

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The theory of non-linear interaction of electromagnetic radiation with hybrid plasmonic structure, which consists of the two-dimensional quantum heterostructure integrated with a plasmonic element in the form of a metal grating, is developed. In particular, the non-linear effect of a detection of high-frequency radiation by a drifting two-dimensional electron gas is examined. Based on the self-consistent solutions of the Maxwell and non-linear hydrodynamic equations in the frames of consistent perturbation theory of the second order, the expression of a photoresponse in the THz region is found. It is shown that the obtained expression contains an additional factor corresponding to the radiative decay rate. The latter was omitted in the previous theories. The presented theory is applied to the analysis of high-frequency properties of hybrid plasmonic structures on the basis of AlGaAs/GaAs quantum heterostructure. The influences of an optically thick substrate and the effect of the electron heating under high electron drifts on the spectral characteristics of the transmission/absorption coefficients and on the photoresponse spectra are analyzed. Some recommendations as for the design of efficient terahertz radiation detectors with the use of the hybrid plasmonic structures as a core element are given. K e y w o r d s: THz plasmonics, THz detection, hybrid plasmonic structures.

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Non-linear Doppler shift of the plasmon resonance in a grating-coupled drifting 2DEG

Cited by 15 publications

References 19 publications

Amplifying mirrors for terahertz plasmons

Amplifying mirrors for terahertz plasmons

Plasmon Enhanced Electron Drag and Terahertz Photoconductance in a Grating-Gated Field-Effect Transistor with Two-Dimensional Electron Channel

Theory of Detection of Terahertz Radiation in Hybrid Plasmonic Structures with Drifting Electron Gas

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