Arsenides-and related III-V materials-based multilayered structures for terahertz applications: Various designs and growth technology

Yachmenev, A. E.; Пушкарев, С. С.; Reznik, R. R.; Хабибуллин, Р. А.; Пономарев, Д. С.

doi:10.1016/j.pcrysgrow.2020.100485

Cited by 52 publications

(22 citation statements)

References 221 publications

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“…The most common CW-radiation sources are quantum cascade lasers, 10,11 high-speed transistors, and diodes. 12,13 Tunable CW THz waves may be obtained by backward-wave oscillators, 14 parametric conversion, 15 and photomixing and frequency multiplication. 16 Broadband CW-radiation can be obtained as a part of the thermal source spectrum, such as that of mercury lamps and globars.…”

Section: Thz Instrumentationmentioning

confidence: 99%

Terahertz radiation and the skin: a review

et al. 2021

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Significance: Terahertz (THz) radiation has demonstrated a great potential in biomedical applications over the past three decades, mainly due to its non-invasive and label-free nature. Among all biological specimens, skin tissue is an optimal sample for the application of THz-based methods because it allows for overcoming some intrinsic limitations of the technique, such as a small penetration depth (0.1 to 0.3 mm for the skin, on average). Aim: We summarize the modern research results achieved when THz technology was applied to the skin, considering applications in both imaging/detection and treatment/modulation of the skin constituents. Approach: We perform a review of literature and analyze the recent research achievements in THz applications for skin diagnosis and investigation. Results: The reviewed results demonstrate the possibilities of THz spectroscopy and imaging, both pulsed and continuous, for diagnosis of skin melanoma and non-melanoma cancer, dysplasia, scars, and diabetic condition, mainly based on the analysis of THz optical properties. The possibility of modulating cell activity and treatment of various diseases by THz-wave exposure is shown as well. Conclusions: The rapid development of THz technologies and the obtained research results for skin tissue highlight the potential of THz waves as a research and therapeutic instrument. The perspectives on the use of THz radiation are related to both non-invasive diagnostics and stimulation and control of different processes in a living skin tissue for regeneration and cancer treatment.

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Section: Thz Instrumentationmentioning

confidence: 99%

Terahertz radiation and the skin: a review

et al. 2021

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“…Therefore, photoconductors with shorter carrier lifetime are preferred to generate THz pulses with a broader frequency-domain bandwidth. 126 , 129 …”

Section: Modern Thz-wave Emittersmentioning

confidence: 99%

“…Therefore, photoconductors with shorter carrier lifetime are preferred to generate THz pulses with a broader frequency-domain bandwidth. 126,129 To date, tremendous studies have been done to improve the performance of PCAs. Berry et al 130 demonstrated a plasmonic photoconductive THz source with enhanced output power by employing two-dimensional plasmonic contact electrodes.…”

Section: Photoconductive Antennasmentioning

confidence: 99%

Cellular effects of terahertz waves

et al. 2021

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. Significance: An increasing interest in the area of biological effects at exposure of tissues and cells to the terahertz (THz) radiation is driven by a rapid progress in THz biophotonics, observed during the past decades. Despite the attractiveness of THz technology for medical diagnosis and therapy, there is still quite limited knowledge about safe limits of THz exposure. Different modes of THz exposure of tissues and cells, including continuous-wave versus pulsed radiation, various powers, and number and duration of exposure cycles, ought to be systematically studied. Aim: We provide an overview of recent research results in the area of biological effects at exposure of tissues and cells to THz waves. Approach: We start with a brief overview of general features of the THz-wave–tissue interactions, as well as modern THz emitters, with an emphasis on those that are reliable for studying the biological effects of THz waves. Then, we consider three levels of biological system organization, at which the exposure effects are considered: (i) solutions of biological molecules; (ii) cultures of cells, individual cells, and cell structures; and (iii) entire organs or organisms; special attention is devoted to the cellular level. We distinguish thermal and nonthermal mechanisms of THz-wave–cell interactions and discuss a problem of adequate estimation of the THz biological effects’ specificity. The problem of experimental data reproducibility, caused by rareness of the THz experimental setups and an absence of unitary protocols, is also considered. Results: The summarized data demonstrate the current stage of the research activity and knowledge about the THz exposure on living objects. Conclusions: This review helps the biomedical optics community to summarize up-to-date knowledge in the area of cell exposure to THz radiation, and paves the ways for the development of THz safety standards and THz therapeutic applications.

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“…Recently, there has been a strong effort to achieve THz sensors using standard complementary metal-oxide-semiconductor (CMOS) technology, taking advantage of robust and reproducible devices at low cost. Recent reviews help to highlight the exceptionally rapid progress of THz science and technology [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

New Insight on Terahertz Rectification in a Metal–Oxide–Semiconductor Field-Effect Transistor Structure

Palma

2020

Electronics

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The use of a metal–oxide–semiconductor field-effect transistor (MOS-FET) permits the rectification of electromagnetic radiation by employing integrated circuit technology. However, obtaining a high-efficiency rectification device requires the assessment of a physical model capable of providing a qualitative and quantitative explanation of the processes involved. For a long time, high-frequency detection based on MOS technology was explained using plasma wave detection theory. In this paper, we review the rectification mechanism in light of high-frequency numerical simulations, showing features never examined until now. The results achieved substantially change our understanding of terahertz (THz) rectification in semiconductors, and can be interpreted by the model based on the self-mixing process in the device substrate, providing a new and essential tool for designing this type of detector.

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Arsenides-and related III-V materials-based multilayered structures for terahertz applications: Various designs and growth technology

Cited by 52 publications

References 221 publications

Terahertz radiation and the skin: a review

Terahertz radiation and the skin: a review

Cellular effects of terahertz waves

New Insight on Terahertz Rectification in a Metal–Oxide–Semiconductor Field-Effect Transistor Structure

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