Terahertz detection by GaN/AlGaN transistors

Fatimy, A. El; Tombet, Stephane Boubanga; Теппе, Ф.; Knap, W.; Veksler, D.; Rumyantsev, Sergey; Shur, M. S.; Pala, Nezih; Gaška, R.; Fareed, Q.; Hu, X.; Seliuta, D.; Valušis, Gintaras; Gaquière, C.; Théron, D.; Cappy, A.

doi:10.1049/el:20062452

Cited by 101 publications

(42 citation statements)

References 13 publications

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“…Thus plasma waves in the FET channel are analogous to shallow water waves, whose velocity is (gh) 1/2 , compare to Eq. (11).…”

Section: Bulk Plasma Wavesmentioning

confidence: 99%

“…Both THz emission [3][4][5][6] and detection, resonant [7][8][9] and non-resonant [10][11], were observed experimentally at cryogenic, as well as at room temperatures, clearly demonstrating effects related to the excitation of plasma waves. At the moment, the most promising application appears to be the broadband THz detection and imaging in the overdamped regime, where plasma waves are nonexistent.…”

Section: Introductionmentioning

confidence: 99%

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Generation and detection of Terahertz radiation by field effect transistors

Dyakonov

2010

Comptes Rendus. Physique

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This is an overview of the main physical ideas for application of field effect transistors for generation and detection of TeraHertz radiation. Resonant frequencies of the two-dimensional plasma oscillations in FETs increase with the reduction of the channel dimensions and reach the THz range for sub-micron gate lengths. When the mobility is high enough, the dynamics of a short channel FET at THz frequencies is dominated by plasma waves. This may result, on the one hand, in a spontaneous generation of plasma waves by a dc current and on the other hand, in a resonant response to the incoming radiation. In the opposite case, when plasma oscillations are overdamped, the FET can operate as an efficient broadband THz detector.

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“…Thus plasma waves in the FET channel are analogous to shallow water waves, whose velocity is (gh) 1/2 , compare to Eq. (11).…”

Section: Bulk Plasma Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Generation and detection of Terahertz radiation by field effect transistors

Dyakonov

2010

Comptes Rendus. Physique

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“…The boundary conditions are U(0,t) = U 0 + U a cos(ωt) at the source side of the channel and zero current at the drain side, j(L,t) = 0. In the detector mode, the time-harmonic part is induced by the external radiation (1)(2)(3)(4)(5)(6)(7). Here the analysis is restricted to a one-dimensional flow that is uniform in the transverse channel direction:…”

Section: Nonlinear Response Of the Channel Confined Electron Plasma Tmentioning

confidence: 99%

Viscous hydrodynamic model of non-linear plasma oscillations in two-dimensional gated conduction channels and application to the detection of terahertz signals

Rudin

2010

Numerical Simulation of Optoelectronic Devices

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“…Generally, THz detectors can be classified into two categories: photonic detectors and thermal detectors. Despite the high sensitivity and extremely fast response time, the sensible band of most photonic detectors is narrow, and their typical requirement of cryogenic cooling systems causes them to be expensive and bulky [9][10][11] . The thermal detector absorbs the THz radiation as heat, which generates measurable output signals induced by the temperature-related changes in material properties.…”

Section: Introductionmentioning

confidence: 99%

Photomechanical meta-molecule array for real-time terahertz imaging

Wen

Jia

et al. 2017

Microsyst Nanoeng

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Real-time terahertz (THz) imaging offers remarkable application possibilities, especially in the security and medical fields. However, most THz detectors work with scanners, and a long image acquisition time is required. Some thermal detectors can achieve realtime imaging by using a focal plane array but have the drawbacks of low sensitivity due to a lack of suitable absorbing materials. In this study, we propose a novel photomechanical meta-molecule array by conveniently assembling THz meta-atom absorbers and bi-material cantilevers together, which can couple THz radiation to a mechanical deflection of the meta-molecules with high efficiency. By optically reading out the mechanical deflections of all of the meta-molecules simultaneously, real-time THz imaging can be achieved. A polyimide sacrificial layer technique was developed to fabricate the device on a glass wafer, which facilitates the transmission of a readout light while the THz wave radiates onto the meta-molecule array directly from the front side. THz images and video of various objects as well as infrared images of the human body were captured successfully with the fabricated metamolecule array. The proposed photomechanical device holds promise in applications in single and broadband THz as well as infrared imaging.

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Terahertz detection by GaN/AlGaN transistors

Cited by 101 publications

References 13 publications

Generation and detection of Terahertz radiation by field effect transistors

Generation and detection of Terahertz radiation by field effect transistors

Viscous hydrodynamic model of non-linear plasma oscillations in two-dimensional gated conduction channels and application to the detection of terahertz signals

Photomechanical meta-molecule array for real-time terahertz imaging

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