Fabrication of CdMgTe/Cd(Mn)Te nanostructures with the application of high-resolution electron-beam lithography

Bobko, E.; Płoch, D.; Wiater, M.; Wójtowicz, T.; Wróbel, J.

doi:10.1016/j.opelre.2017.04.005

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…The gratings were patterned with an electron beam lithography (EBL). In the case of II-VI materials, low-temperature EBL procedures are preferable [32]; therefore we used CSAR 62 positive-tone resist, which requires lower backing temperatures as compared to PMMA. In our case, samples were briefly baked (during 5 min) at 155 • C on a hotplate.…”

Section: Etchingmentioning

confidence: 99%

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

et al. 2020

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The cyclotron and magnetoplasmon resonances were studied at 2 K in grating metamaterials fabricated on wafers with one or two modulation doped CdTe/CdMgTe quantum wells. The gratings (with the period varied between 2 μ m and 8 μ m) were prepared with an electron beam lithography either by etching or by evaporation of Au. The gratings were studied with an atomic force microscope which revealed a correlation between the depth and width of etched grooves at a constant time of etching. The sharpest resonances observed are due to excitation of magnetoplasmon in the case of Au gratings on a wafer with one quantum well. Etched samples with two quantum wells showed the strongest tuneability of magnetoplasmon resonances with the period of the grating and illumination with white light. We showed that the samples studied can be used as resonant or quasi-resonant terahertz detectors tuneable with magnetic field and white light.

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Section: Etchingmentioning

confidence: 99%

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

et al. 2020

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“…The gratings were patterned with electron beam lithography. We applied a low-temperature procedure, which has been shown to be preferable in the case of II-VI materials [22]. For this reason, instead of using a standard PMMA resist, we applied a positive-tone resist CSAR 62, for which the baking temperature is lower than that for PMMA.…”

Section: Samples and Experimentsmentioning

confidence: 99%

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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Functionalized Magnetic Nanoparticle (MNPs)-based Biosensors

Vasić

Knez

Leitgeb

2021

Analytical Applications of Functionalized Magnetic Nanoparticles

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Magnetic nanoparticles (MNPs) have gained great attention for their remarkable physical and chemical properties in developing biosensors for different applications, such as environmental, clinical and biological. MNPs can be incorporated in the transducers or be dispersed into specimens, which are attracted by an external magnetic field to the active detection surface of biosensors. In this chapter, the synthesis, properties and characterization of MNPs for biosensor applications are discussed, together with recent applications of functionalized MNPs in such biosensor applications. Electrochemical, optical, piezoelectric and magnetic field based biosensors are discussed, considering their analytical properties, as well as enzyme-based biosensors, such as glucose oxidase and cholesterol oxidase-based biosensors.

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Fabrication of CdMgTe/Cd(Mn)Te nanostructures with the application of high-resolution electron-beam lithography

Cited by 5 publications

References 10 publications

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

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

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

Functionalized Magnetic Nanoparticle (MNPs)-based Biosensors

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