Temperature dependence of plasmonic terahertz absorption in grating-gate gallium-nitride transistor structures

Muravjov, A. V.; Veksler, D.; Popov, V. V.; Polischuk, O. V.; Pala, Nezih; Hu, X.; Gaška, R.; Saxena, H.; Peale, Robert E.; Shur, M. S.

doi:10.1063/1.3292019

Cited by 139 publications

(75 citation statements)

References 19 publications

(20 reference statements)

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“…Examples of these structures include Si-, GaAs-, and GaN-based FETs with periodic multifinger grating gates [1,5,6,14], Si MOSFETs with a periodically modulated oxide thickness [28], and very recently GaAs/AlGaAs heterostructures with a periodically modulated width of the 2D electron channel [26]. All of these systems feature step-like periodic changes of various parameters of the 2D electron channel such as electron density, screening, and geometric size.…”

Section: Tl Theory Of Plasmonic Crystals In Periodic 2d Electronmentioning

confidence: 99%

“…However, and should be defined to satisfy 1/2 consistent with Eq. (14). Once one of these quantities is defined in terms of and the second one is determined by the power relationship formulated above.…”

Section: Transmission Line Formulation Of the 2d Plasmon Theorymentioning

confidence: 99%

“…(14) and the voltage in the plane of the 2DEG. These boundary conditions imply continuity of the effective plasma current but discontinuity of the actual plasma current .…”

Section: Tl Theory Of Plasmonic Crystals In Periodic 2d Electronmentioning

confidence: 99%

“…The expression for power in Eq. (14) can be reduced to the standard TL form above by defining the effective voltage and current so as to include the form-factor , . and are not unique as in the case of standard TL definitions of and .…”

Section: Transmission Line Formulation Of the 2d Plasmon Theorymentioning

confidence: 99%

“…The frequencies of 2D plasmons in semiconductor heterostructures conveniently fall in the THz region and can be easily tuned by changing the 2D electron density through an applied field effect. These features make 2D plasmons an excellent candidate to be used for frequency tunable THz detection [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The predicted instabilities of 2D plasma waves interacting with incident THz EM radiation also provide opportunities for designing THz sources [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Transmission line theory of collective plasma excitations in periodic two-dimensional electron systems: Finite plasmonic crystals and Tamm states

Aǐzin

Dyer

2012

Phys. Rev. B

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We present a comprehensive theory of the one-dimensional plasmonic crystal formed in the grating gated two-dimensional electron gas (2DEG) in semiconductor heterostructures. To describe collective plasma excitations in the 2DEG, we develop a generalized transmission line theoretical formalism consistent with the plasma hydrodynamic model. We then apply this formalism to analyze the plasmonic spectra of 2DEG systems with step-like periodic changes of electron density and/or gate screening. We show that in a periodically modulated 2DEG, a plasmonic crystal is formed and derive closed-form analytical expressions describing its energy band spectrum for both infinite and finite size crystals. Our results demonstrate a non-monotonic dependence of the plasmonic band gap width on the electron density modulation. At so-called transparency points where the plasmon propagates through the periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In semi-infinite plasmonic crystals, we demonstrate the formation of plasmonic Tamm states and analytically derive their energy dispersion and spatial localization. Finally, we present detailed numerical analysis of the plasmonic band structure of a finite four-period plasmonic crystal terminated either by an Ohmic contact or by an infinite barrier on each side. We trace the evolution of the plasmonic band spectrum, including the Tamm states, with changing electron density modulation and analyze the boundary conditions necessary for formation of the Tamm states. We also analyze interaction between the Tamm states formed at the opposite edges of the short length plasmonic crystal. The validity of our theoretical approach was confirmed in experimental studies of plasmonic crystals in short modulated plasmonic cavities (G. C. Dyer et. al., Phys. Rev. Lett. 109, 126803 (2012)) which demonstrated excellent quantitative agreement between theory and experiment. * gregory.aizin@kbcc.cuny.edu † gcdyer@sandia.gov 2

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Section: Tl Theory Of Plasmonic Crystals In Periodic 2d Electronmentioning

confidence: 99%

Section: Transmission Line Formulation Of the 2d Plasmon Theorymentioning

confidence: 99%

“…(14) and the voltage in the plane of the 2DEG. These boundary conditions imply continuity of the effective plasma current but discontinuity of the actual plasma current .…”

Section: Tl Theory Of Plasmonic Crystals In Periodic 2d Electronmentioning

confidence: 99%

Section: Transmission Line Formulation Of the 2d Plasmon Theorymentioning

confidence: 99%