Magnetoplasmons in high electron mobility CdTe/CdMgTe quantum wells

Grigelionis, I.; Nogajewski, Karol; Karczewski, G.; Wójtowicz, T.; Czapkiewicz, M.; Wróbel, J.; Boukari, H.; Mariette, H.; Łusakowski, J.

doi:10.1103/physrevb.91.075424

Cited by 15 publications

(27 citation statements)

References 36 publications

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“…It should be mentioned that at specific magnetic field and plasmon wavevector, the MPP modes will probably couple with Bernstein modes and the frequency splitting behavior will appear particularly at cryogenic temperature [14,16]. Similar theoretical and experimental results for the AlGaN/GaN [24,25] and CdMgTe/CdTe [15,19] heterostructure materials have been reported.…”

Section: Absorption Spectrasupporting

confidence: 59%

“…The semi-classical 2DEG magnetoconductivity tensor describing the electromagnetic and transport properties of the 2DEG layer in the x-y plane under the excitation of magnetic field (B) was expressed by [15] s w s s…”

Section: Nonlocal 2deg Modelmentioning

confidence: 99%

“…Depending on the sign and amplitude of the bias voltage and the material type, the observed resonant frequency could be altered more or less. The other convenient method to change the resonant frequency was realized by introducing the static magnetic field along the direction perpendicular to the 2DEG plane, where the magnetoplasmon-polaritons (MPPs) modes will dominate in the detector response [14,15]. Both the amplitude and frequency were influenced by the strength of magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Absorption Spectrasupporting

confidence: 59%

Section: Nonlocal 2deg Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Cao

2018

J. Phys. Commun.

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“…Second, we showed that we were able to generate and transmit circularly polarized radiation to the sample cooled to a low temperature, which is confirmed by the red curve in Figure 6. Third, based on earlier studies on magnetoplasmons in CdTe-based QWs [25][26][27], we state that the resonances observed in Figure 6 on the etched sample were due to the excitation of a magnetoplasmon, which appeared not to be circularly polarized.…”

Section: Discussionmentioning

confidence: 66%

Polarization of Magnetoplasmons in Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells

et al. 2020

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Grating metamaterials were fabricated with electron beam lithography on CdTe/CdMgTe modulation doped structures with two non-interacting quantum wells. Two types of samples were studied: with etched gratings and with gratings formed by deposition of Au stripes. The polarization properties at THz frequencies of the gratings were determined at room temperature. It was shown that Au gratings formed a linear polarizer, while etched gratings did not polarize THz radiation. Transmission of circularly polarized THz radiation at low temperatures through a sample with no grating showed a strongly circularly polarized cyclotron resonance transition. Transmission of this radiation through a sample with an etched grating showed a magnetoplasmon transition that was almost perfectly linearly polarized. We concluded that magnetoplasmons in metamaterials with etched gratings are linearly polarized excitations, possibly with a small contribution of a circular component. This work opens the possibility of the detailed study of the polarization of magnetoplasmons, which has not been explored in the past.

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“…Magnetoplasmons in CdTe were previously studied in less complicated structuressingle CdTe/CdMgTe quantum well doped with iodine donors in a quantum point contact or grid-gate geometry [3][4][5]. A photoluminescence characterization of samples is one of necessary steps towards measurements in which a coupling of two types of excitations -a visible one and a THz one -are active.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of CdTe/CdMgTe Double Quantum Wells with a Two-Dimensional Electron Gas

et al. 2017

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Magnetophotoluminescence measurements at liquid helium temperatures were carried out on asymmetric double quantum wells based on CdTe/CdMgTe heterostructures. Due to doping with shallow iodine donors, a twodimensional electron gas was present in the quantum wells. The samples studied differed with the quantum well widths and doping level. We show a resemblance of the luminescence to results obtained on single quantum wells which suggests that in samples studied the quantum wells are not strongly coupled.

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Magnetoplasmons in high electron mobility CdTe/CdMgTe quantum wells

Cited by 15 publications

References 36 publications

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

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

Polarization of Magnetoplasmons in Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells

Photoluminescence of CdTe/CdMgTe Double Quantum Wells with a Two-Dimensional Electron Gas

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