Polarization and Spatial Mode Structure of Mid-Infrared-Driven Terahertz-to-Microwave Radiation

Mitrofanov, A.V.; Voronin, A.A.; Rozhko, M.V.; Sidorov-Biryukov, D.A.; Nazarov, M.M.; Fedotov, A.B.; Zheltikov, A.M.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 сентября 2021 г.

Авторы: Mitrofanov A.V., Voronin A.A., Rozhko M.V., Sidorov-Biryukov D.A., Nazarov M.M., Fedotov A.B., Zheltikov A.M.
Журнал: ACS Photonics
Том: 8
Номер: 7
Год издания: 2021
Издательство: American Chemical Society
Местоположение издательства: United States
Первая страница: 1988
Последняя страница: 1996
Номер статьи: acsphotonics.0c01966
DOI: 10.1021/acsphotonics.0c01966
Аннотация: Polarization- and angle-resolved analysis of microwave-to-terahertz (μWv/THz) radiation from gas-phase plasmas induced by ultrashort mid-infrared laser pulses reveals a complex vectorial electrodynamic picture of μWv/THz generation by a diverse manifold of laser-driven plasma currents and provides a powerful tool to distinguish between currents of different spatial symmetries as sources of μWv/THz radiation. In experiments with a single-color mid-IR driver, the spatial mode of μWv/THz radiation is found to retain a remarkably uniform, conical-emission structure across its entire spectral span, with angular dispersion and a spatial mode profile as dictated by Cherenkov-type phase matching. This spatial mode structure is consistent with its polarization properties of μWv/THz radiation, indicating the dominant role of radiation by ponderomotively driven longitudinal currents. In experiments with a two-color laser driver, the spatial-polarization mode structure of μWv/THz radiation is found to change across its spectrum and as a function of the gas pressure, revealing mixed symmetries of underlying electric currents and indicating the shifting roles of transverse and longitudinal currents as mechanisms behind μWv/THz generation.
Добавил в систему: Воронин Александр Александрович

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Polarization and Spatial Mode Structure of Mid-Infrared-Driven Terahertz-to-Microwave Radiationстатья Исследовательская статья

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