Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells as Terahertz Detectors for High Magnetic Field Applications

Yavorskiy, D.; Szola, M.; Karpierz, K.; Bożek, R.; Rudniewski, R.; Karczewski, G.; Wójtowicz, T.; Wróbel, J.; Łusakowski, J.

doi:10.3390/app10082807

Cited by 3 publications

(2 citation statements)

References 40 publications

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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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Section: Discussionmentioning

confidence: 66%

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

et al. 2020

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“…The estimated detector response to free-space illumination scaled quadratically with plasmon quality factor, and promised sensitive detection for practically important terahertz range [11]. The idea ignited a booming research in the field of 2d plasmon-enhanced detectors, with further proposals based on different materials [12][13][14][15][16][17], rectification mechanisms [18][19][20][21], and coupling schemes [22,23].…”

Section: Introductionmentioning

confidence: 99%

A place for two-dimensional plasmonics in electromagnetic wave detection

Mylnikov,

Svintsov

2021

Preprint

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Plasmons in two-dimensional electron systems (2DES) feature ultra-strong confinement and are expected to efficiently mediate the interactions between light and charge carriers. Despite these expectations, the electromagnetic detectors exploiting 2d plasmon resonance have been so far inferior to their non-resonant counterparts. Here, we theoretically analyse the origin of these failures, and suggest a proper niche for 2d plasmonics in electromagnetic wave detection. We find that a confined 2DES supporting plasmon resonance has an upper limit of absorption cross-section, which is identical to that of simple metallic dipole antenna. Small size of plasmonic resonators implies their weak dipole moments and impeded coupling to free-space radiation. Achieving the 'dipole limit' of absorption cross-section in isolated 2DES is possible either at unrealistically long carrier momentum relaxation times, or at resonant frequencies below units of terahertz. We further show that amendment of even small metal contacts to 2DES promotes the coupling and reduces the fundamental mode frequency. The contacted resonators can still have deep-subwavelength size. They can be merged into compact arrays of detectors, where signals from elements tuned to different frequencies are summed up. Such arrays may find applications in multi-channel wireless communications, hyper-spectral imaging, and energy harvesting.

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Limiting capabilities of two-dimensional plasmonics in electromagnetic wave detection

Mylnikov

Svintsov

2022

Phys. Rev. Applied

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Grating Metamaterials Based on CdTe/CdMgTe Quantum Wells as Terahertz Detectors for High Magnetic Field Applications

Cited by 3 publications

References 40 publications

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

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

A place for two-dimensional plasmonics in electromagnetic wave detection

Limiting capabilities of two-dimensional plasmonics in electromagnetic wave detection

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