Optical-to-terahertz switches: state of the art and new opportunities for multispectral imaging

D.S. Ponomarev^†^a, b, c, A.E. Yachmenev^b, D.V. Lavrukhin^a, b, R.A. Khabibullin^b, c, N.V. Chernomyrdin^a, I.E. Spektor^a, V.N. Kurlov^d, V.V. Kveder^d, K.I. Zaytsev^a
^aProkhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russian Federation
^bV. G. Mokerov Institute of Ultra High Frequency Semiconductor Electronics of the Russian Academy of Sciences, Nagornyi proezd, 7, p. 5 , Moscow, 117105, Russian Federation
^cMoscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
^dOsipyan Institute of Solid State Physics, Russian Academy of Sciences, Akademika Osip'yana str. 2, Chernogolovka, Moscow Region, 142432, Russian Federation

Compact and cost-effective spectrometers and imaging systems in the terahertz (THz) frequency range based on optical-THz photoconductive converters of ultrashort laser pulses (photoconductive antennas — PCAs) are actively being developed and widely used to solve fundamental and applied problems in a variety of fields of science and technology. This high activity of research and development is associated with the PCAs' reliability and compact size, the easy scalability of a single element to 1D and 2D arrays, and PCAs' ability to provide a wide spectral range and high dynamic range of recorded THz signals without cooling. Recently, systems for multi-pixel detection of THz radiation based on matrix PCA detectors, designed to greatly increase the speed of THz imaging, have been of particular interest. This review presents the latest trends in the development of PCA-based THz devices, PCA-based methods of THz pulsed spectroscopy and imaging, as well as alternative approaches to THz pulse recording and THz imaging.

Keywords: THz radiation, sources and detectors of THz pulses, semiconductors, THz imaging, time-domain THz spectroscopy, photoconductive antennas, low-temperature grown GaAs, InAlAs/InGaAs superlattice heterostructures, ultrashort pulse generation, near-field THz microscopy, sol„id-immersion microscopy, THz tomography, multispectral THz imaging
PACS: 07.57.−c, 42.30.Wb, 84.40.−x (all)
DOI: 10.3367/UFNe.2023.07.039503
URL: https://ufn.ru/en/articles/2024/1/b/
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2024PhyU...67....3P
Citation: Ponomarev D S, Yachmenev A E, Lavrukhin D V, Khabibullin R A, Chernomyrdin N V, Spektor I E, Kurlov V N, Kveder V V, Zaytsev K I "Optical-to-terahertz switches: state of the art and new opportunities for multispectral imaging" Phys. Usp. 67 3–21 (2024)

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Received: 24th, November 2022, revised: 4th, July 2023, accepted: 5th, July 2023

Оригинал: Пономарёв Д С, Ячменев А Э, Лаврухин Д В, Хабибуллин Р А, Черномырдин Н В, Спектор И Е, Курлов В Н, Кведер В В, Зайцев К И «Оптико-терагерцевые преобразователи: современное состояние и новые возможности для мультиспектральной визуализации» УФН 194 2–22 (2024); DOI: 10.3367/UFNr.2023.07.039503

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