Investigation of the Dyakonov–Shur instability for THz wave generation based on the Boltzmann transport equation

Kargar, Zeinab; Linn, Tobias; Jungemann, C.

doi:10.1088/1361-6641/aad956

Cited by 8 publications

(6 citation statements)

References 22 publications

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“…In this work, we exploit a scheme for the generation of coherent THz frequency combs in graphene field-effect transistors, arising from the Dyakonov-Shur (DS) plasmonic instability [8,9]. The latter can be excited via the injection of an electric current, thus forgoing the necessity of optical pumping.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Frequency Comb in Graphene Field-Effect Transistors

Cosme

2020

EPJ Web Conf.

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Graphene Field-effect transistors (GFETs) are excellent candidates for all-electric, low-power radiation sources and detectors based on integrated circuit technology. In this work, we show that a hydrodynamic instability can be ex¬plored (the Dyakonov–Shur instability) to excite the graphene plasmons. The instability can be sustained with the help of a source-to-drain current and con¬trolled with the gate voltage. It is shown that the plasmons radiate a frequency comb in the Terahertz (THz) range. It is argued how this can pave the stage for a new generation of low power THz sources in integrated-circuit technology.

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Section: Introductionmentioning

confidence: 99%

Terahertz Frequency Comb in Graphene Field-Effect Transistors

Cosme

2020

EPJ Web Conf.

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“…In this Letter, we exploit a scheme for the generation of coherent THz frequency combs in graphene field-effect transistors, arising from the Dyakonov-Shur (DS) plasmonic instability [21,22]. The latter can be excited via the injection of an electric current, thus forgoing the necessity of optical pumping.…”

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confidence: 99%

“…In this work, we exploit a scheme for the generation of coherent THz frequency combs in graphene field-effect transistors, arising from the Dyakonov−Shur (DS) plasmonic instability. 23,24 The latter can be excited via the injection of an electric current; thus, forgoing the necessity of optical pumping to obtain THz emission. 25−27 This opens the possibility to the development of an all-electric, low-consumption stimulated THL, capable of operating at room temperature.…”

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confidence: 99%

“…In this work, we exploit a scheme for the generation of coherent THz frequency combs in graphene field-effect transistors, arising from the Dyakonov–Shur (DS) plasmonic instability. , The latter can be excited via the injection of an electric current; thus, forgoing the necessity of optical pumping to obtain THz emission. − This opens the possibility to the development of an all-electric, low-consumption stimulated THL, capable of operating at room temperature. Our calculations are based on the hydrodynamic formulation of the plasma in monolayer graphene, from which we analytically obtain the instability criteria and numerically extract the radiation spectrum, intensity, and correlation.…”

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confidence: 99%

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Terahertz Laser Combs in Graphene Field-Effect Transistors

Cosme

Terças

2020

ACS Photonics

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Electrically injected terahertz (THz) radiation sources are extremely appealing given their versatility and miniaturization potential, opening the venue for integrated-circuit THz technology. In this work, we show that coherent THz frequency combs in the range 0.5 THz < ω/2π < 10 THz can be generated making use of graphene plasmonics. Our setup consists of a graphene field-effect transistor with asymmetric boundary conditions, with the radiation originating from a plasmonic instability that can be controlled by direct current injection. We put forward a combined analytical and numerical analysis of the graphene plasma hydrodynamics, showing that the instability can be experimentally controlled by the applied gate voltage and the injected current. Our calculations indicate that the emitted THz comb exhibits appreciable temporal coherence (g (1) (τ ) > 0.6) and radiant emittance (10 7 Wm −2 ). This makes our scheme an appealing candidate for a graphenebase THz laser source. Moreover, a mechanism for the instability amplification is advanced for the case of substrates with varying electric permitivitty, which allows to overcome eventual limitations associated with the experimental implementation.

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“…Electronic THz generation is addressed in a second group of papers. Two of them theoretically discuss the possibility to exploit Dyakonov-Shur plasma instability to generate THz waves [24], [25]: Kargar et al make use of a deterministic solver for the Boltzmann transport equation (BTE) which includes electron-phonon scattering and the Pauli principle to analyse the impact of degeneracy and temperature on the generation of plasma waves [26], while Linn et al evaluate multiple moments-based transport models based on two or four moments of the distribution function for their ability to describe plasma oscillations by comparing them to the BTE [27]. The design and performance of a traveling-wave tube based on a double corrugated waveguide to operate in the 210-250 GHz range with output power about 1 W, to be used in high data rate wireless links, is then discussed by Basu et al [28].…”

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confidence: 99%