A. A. Ushakov, M. Matoba, N. Nemoto, N. Kanda, K. Konishi, N. A. Panov, D. E. Shipilo, P. A. Chizhov, V. V. Bukin, M. Kuwata-Gonokami, J. Yumoto, O. G. Kosareva, S. V. Garnov, A. B. Savel'ev, “Spectrally selective modulation of terahertz radiation beams”, Kvantovaya Elektronika, 2020, Volume 50, Number 11,Pages <nobr>1029

This article is cited in 1 paper

Terahertz radiation

Spectrally selective modulation of terahertz radiation beams

A. A. Ushakov^a, M. Matoba^b, N. Nemoto^b, N. Kanda^cd, K. Konishi^e, N. A. Panov^fgh, D. E. Shipilo^fgh, P. A. Chizhov^ai, V. V. Bukin^a, M. Kuwata-Gonokami^b, J. Yumoto^be, O. G. Kosareva^fgh, S. V. Garnov^a, A. B. Savel'ev^fgh

^a Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^b Department of Physics, University of Tokyo, Japan
^c RIKEN Center for Advanced Photonics, Japan
^d Photon Science Centre, The University of Tokyo, Japan
^e Institute for Photon Science and Technology, The University of Tokyo, Japan
^f Lomonosov Moscow State University, Faculty of Physics
^g International Laser Center of Moscow State University
^h P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
ⁱ All-Russian Institute for Scientific and Technical Information of Russian Academy of Sciences, Moscow

Abstract: We report the results of an experimental study on the focusing of broadband terahertz (THz) radiation using lenses and Fresnel zone plates. The obtained data are compared with the results of numerical simulations. It is shown that the use of lenses for focusing THz radiation can lead to the appearance of a ring structure in the spatial distributions of its intensity. The use of Fresnel zone plates allows the spatial distribution of the THz radiation intensity to be varied at selected frequencies of the spectrum.

Keywords: terahertz radiation, diffraction, electro-optical detection, Fresnel zone plate.

Received: 16.09.2020