Room-Temperature AlGaN/GaN Terahertz Plasmonic Detectors with a Zero-Bias Grating

Spisser, Helene; Grimault-Jacquin, A.-S.; Zerounian, N.; Aassime, A.; Cao, Lei; Boone, F.R.; Maher, Hassan; Cordier, Y.; Aniel, F.

doi:10.1007/s10762-015-0224-y

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…In related work, the two-dimensional electron gas in a AlGaN/GaN heterojunction was studied [85]. A metal grating was placed between two ohmic contacts.…”

Section: Terafets (Class B1mentioning

confidence: 99%

A review of terahertz detectors

Lewis

2019

J. Phys. D: Appl. Phys.

187

101

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Physics is the interplay of energy and matter. Energy, in the form of light, interacting with matter, principally in the solid state, underpins this topical review. The subject is developed carefully and methodically, beginning with basic definitions pertaining to terahertz detectors and terahertz radiation, then proceeding systematically to delineate characteristics of terahertz photons and terahertz detectors in more detail. In-between, the intimate connection linking terahertz sensors and terahertz sources is highlighted-an important aspect unfortunately often overlooked or ignored when terahertz detectors are discussed in isolation. At the centre of this topical review are the various physical mechanisms by which electromagnetic radiation of terahertz frequencies interacts with matter. The logic is to present first the underlying physical principles of detection before presenting the practical implementation in a specific device, rather than the other way around. A taxonomy of terahertz detectors is then proposed based on the underlying physical principles of detection. Following on from this classification, stateof-the-art terahertz detectors are surveyed and appraised; this overview constitutes the longest section of the review. Key detector parameters which inform applications are then presented and tabulated. Finally, the present state-of-the-art is anchored within the wider scientific context of historical developments and future prospects.

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“…In related work, the two-dimensional electron gas in a AlGaN/GaN heterojunction was studied [85]. A metal grating was placed between two ohmic contacts.…”

Section: Terafets (Class B1mentioning

confidence: 99%

A review of terahertz detectors

Lewis

2019

J. Phys. D: Appl. Phys.

187

101

View full text Add to dashboard Cite

show abstract

“…For room temperature detection with heterostructure materials in the resonant region, the electron concentration and electron mobility should be as high as possible. With dense electrons under metallic gratings [12,13], the interaction of collective oscillation of electrons with the incident THz electromagnetic field will be strengthened. High mobility electrons own longer phenomenological relaxation time, although various scattering mechanisms become significant and therefore obstacle this effect at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on calculated terahertz absorption spectra of different heterostructure materials with external magnetic field

Cao

2018

J. Phys. Commun.

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Room temperature operation and frequency tunability are attractive advantages of terahertz (THz) detectors based on the two-dimensional electron gas (2DEG) in the heterostructure material with external magnetic field. This work compared absorption spectra of four typical heterostructure materials (AlGaN/GaN, InAlN/GaN, AlGaAs/GaAs and SiGe/Si) with the nonlocal magnetoconductivity model at ambient and cryogenic temperatures in the frequency range 0-5 THz. The GaN based materials have the highest absorption amplitude, while the AlGaAs/GaAs material owns the largest frequency shift as the magnetic field increases up to 10 tesla, although superconducting magnets at cryogenic temperature are usually employed to provide that high magnetic field. The numerical results showed that the absorption properties (amplitude and frequency) could be further optimized by other parameters, such as the period and filling factor of the grating coupler, and the barrier thickness.

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Selective terahertz emission due to electrically excited 2D plasmons in AlGaN/GaN heterostructure

Shalygin

Moldavskaya

Vinnichenko

et al. 2019

Journal of Applied Physics

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Terahertz radiation emission from an electrically excited AlGaN/GaN heterostructure with a surface metal grating was studied under conditions of two-dimensional (2D) electron heating by the lateral electric field. Intensive peaks related to nonequilibrium 2D plasmons were revealed in the terahertz emission spectra with up to 4 times selective amplification of the radiation emission in the vicinity of 2D plasmon resonance. This selective emission was shown to be frequency-controllable by the grating period. Exact spectral positions of the 2D plasmon resonances were preliminarily experimentally detected with the help of equilibrium transmission spectra measured at various temperatures. The resonance positions are in a satisfactory agreement with the results of theoretical simulation of the transmission spectra performed using a rigorous solution of Maxwell's equations. The effective temperature of hot 2D electrons was determined by means of I-V characteristics and their analysis using the power balance equation. It was shown that for a given electric field, the effective temperature of nonequilibrium 2D plasmons is close to the hot 2D electron temperature. The work may have applications in GaN-based electrically pumped emitters of terahertz radiation.

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Room-Temperature AlGaN/GaN Terahertz Plasmonic Detectors with a Zero-Bias Grating

Cited by 13 publications

References 22 publications

A review of terahertz detectors

A review of terahertz detectors

Comparative study on calculated terahertz absorption spectra of different heterostructure materials with external magnetic field

Selective terahertz emission due to electrically excited 2D plasmons in AlGaN/GaN heterostructure

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