Far-infrared response of one-dimensional electronic systems in single- and two-layered quantum wires

Demel, T.; Heitmann, D.; Grambow, P.; Ploog, K.

doi:10.1103/physrevb.38.12732

Cited by 223 publications

(57 citation statements)

References 14 publications

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“…This would then shift all the ω c -related resistivity oscillations and would completely destroy any seeming agreement with experiments (the depolarization shift is not negligible under the real experimental conditions, see a detailed comparison in Table I of Ref. 70 ; to the contrary, it is very large and has been many times observed both in the absorption [71][72][73] experiments). Moreover, one should not ignore that (already mentioned) fact that about ten years before the first MIZRS experiment by Mani et al…”

Section: (B)mentioning

confidence: 96%

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Mikhaǐlov

2011

Phys. Rev. B

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The phenomena of the microwave induced zero resistance states (MIZRS) and the microwave induced resistance oscillations (MIRO) were discovered in the ultraclean two-dimensional electron systems in 2001 -2003 and have attracted great interest of researchers. In spite of numerous theoretical efforts the true origin of these effects remains unknown so far. We show that the MIRO/ZRS phenomena are naturally explained by the influence of the ponderomotive forces which arise in the near-contact regions of the two-dimensional electron gas under the action of microwaves. The proposed analytical theory is in agreement with all experimental facts accumulated so far and provides a simple and self-evident explanation of the microwave frequency, polarization, magnetic field, mobility, power and temperature dependencies of the observed effects.

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Section: (B)mentioning

confidence: 96%

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Mikhaǐlov

2011

Phys. Rev. B

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“…The first observation of CR in 2DESs was reported for charged carriers in an inversion layer on Si [4, 5]. Subsequently, CR spectroscopy has been successfully applied to research on many two-dimensional systems, for example, isotropic 2D carriers in GaAs heterostructures [6][7][8], composite fermions [9], heavy fermions in MgZnO/ZnO heterojunctions [10,11], and anisotropic heavy fermions in AlAs quantum wells [12,13].It is widely believed that the cyclotron resonance originates from the dimensional magnetoplasma resonance [15,16,20]. The frequency of the hybrid cyclotron magnetoplasma mode is described by the equation…”

mentioning

confidence: 99%

Fine structure of cyclotron resonance in a two-dimensional electron system

et al. 2016

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It is established that cyclotron resonance (CR) in a high-quality GaAs/AlGaAs two-dimensional electron system (2DES) originates as a pure resonance, that does not hybridize with dimensional magnetoplasma excitations. The magnetoplasma resonances form a fine structure of the CR. The observed fine structure of the CR results from the interplay between coherent radiative and incoherent collisional mechanisms of 2D plasma relaxation. We show that the range of 2DES filling factors from which the phenomenon arises is intimately connected to the fundamental fine-structure constant.Cyclotron resonance (CR) spectroscopy is the most direct and convenient method of characterizing the Fermi surface and determining the effective mass of semiconductors [1][2][3]. In a two-dimensional electron system (2DES), a perpendicular magnetic field quenches the inplane motion of electrons into cyclotron orbits. In turn, if the phase and polarization of the incident electromagnetic radiation are synchronized with the electron orbital motion, CR is triggered. The first observation of CR in 2DESs was reported for charged carriers in an inversion layer on Si [4, 5]. Subsequently, CR spectroscopy has been successfully applied to research on many two-dimensional systems, for example, isotropic 2D carriers in GaAs heterostructures [6][7][8], composite fermions [9], heavy fermions in MgZnO/ZnO heterojunctions [10,11], and anisotropic heavy fermions in AlAs quantum wells [12,13].It is widely believed that the cyclotron resonance originates from the dimensional magnetoplasma resonance [15,16,20]. The frequency of the hybrid cyclotron magnetoplasma mode is described by the equationwhere ω c = eB/m * c is the cyclotron frequency, and ω p is the dimensional plasmon frequency [17] (Gaussian units are used in this Letter unless otherwise stated):Here, n s and m * are the density and the effective mass of the 2D electrons, and ε is the effective permittivity of the surrounding medium. For a narrow 2DES stripe of width W , the plasmon wavevector can be approximately described by q = πN/W (N = 1, 2, . . . is the number of the plasmon harmonic).Contrary to general believe, we discovered that the CR originates as a pure resonance, that does not hybridize with dimensional magnetoplasma excitations. The CR rises as a single peak with superimposed contribution from different dimensional magnetoplasma modes. Therefore, initially the CR line shape exhibits a multipeak structure. We show that the CR fine structure is resolved when the coherent radiative 2D plasma relaxation dominates the incoherent collisional damping. In large samples, this regime appears when the 2D conductivity 2πσ xx is much larger than c. Moreover, the range of 2DES filling factors ν in which the CR fine structure necessarily arises is dictated by the relation 2πσ xy > c. The latter can be rewritten very elegantly as ν > 1/α, where α = e 2 / c ≈ 1/137 is the fundamental fine-structure constant.Experiments were performed on a set of high-quality GaAs/AlGaAs single quantum wells with a well w...

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“…In comparison to the polariton dispersion obtained by geometrical tuning, the limiting value of the upper polariton branch has moved to 3.5 THz. This can be explained by an increased plasma frequency of x p ¼ 2p Â 1.5 THz due to the induced sidewall depletion, 25 which also leads to a reduced overlap factor of f w ¼ 0.26. Altogether, the permittivity tuning yields similar results as the geometrical tuning: X R ¼ 2p Â 0.39 THz and Dx g ¼ 2p Â 0.09 THz.…”

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confidence: 99%

Ultrastrong coupling of intersubband plasmons and terahertz metamaterials

Dietze

Andrews

Klang

et al. 2013

Applied Physics Letters

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We report on the ultrastrong-coupling between localized plasmons of a planar terahertz metamaterial and intersubband plasmons in a modulation doped quantum well sample. Such a system exhibits the formation of a lower and an upper polariton branch when the metamaterial eigenfrequency is tuned close to resonance with the intersubband transition. We achieve a normalized polariton splitting of 22% and a polaritonic gap of 2.4% of the intersubband transition frequency. In addition to the usual geometrical scaling, we demonstrate the effective tuning of the metamaterial resonance by dry etching with a tuning range of more than 1 THz.

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Far-infrared response of one-dimensional electronic systems in single- and two-layered quantum wires

Cited by 223 publications

References 14 publications

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Fine structure of cyclotron resonance in a two-dimensional electron system

Ultrastrong coupling of intersubband plasmons and terahertz metamaterials

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