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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Druckformat: 0040-2508
ISSN Online: 1943-6009

Volumes:
Volumen 78, 2019 Volumen 77, 2018 Volumen 76, 2017 Volumen 75, 2016 Volumen 74, 2015 Volumen 73, 2014 Volumen 72, 2013 Volumen 71, 2012 Volumen 70, 2011 Volumen 69, 2010 Volumen 68, 2009 Volumen 67, 2008 Volumen 66, 2007 Volumen 65, 2006 Volumen 64, 2005 Volumen 63, 2005 Volumen 62, 2004 Volumen 61, 2004 Volumen 60, 2003 Volumen 59, 2003 Volumen 58, 2002 Volumen 57, 2002 Volumen 56, 2001 Volumen 55, 2001 Volumen 54, 2000 Volumen 53, 1999 Volumen 52, 1998 Volumen 51, 1997

Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v74.i7.60
pages 629-640

PROPAGATION AND FOCUSING OF MODES OF DIELECTRIC RESONATORS OF TERAHERTZ RANGE LASERS

O. V. Gurin
V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61077
А. V. Degtyarev
V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61022, Ukraine
V. A. Maslov
V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61022, Ukraine
V. A. Svich
V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61077
V. S. Senyuta
V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61022, Ukraine
A. N. Topkov
V. Karazin Kharkiv National University 4, Svoboda Sq., 61077 Kharkiv, Ukraine

ABSTRAKT

Cylindrical vectorial beams have a great number of applications, including electron acceleration, material processing, high-resolution metrology, microellipsometry and spectroscopy. Nevertheless, there are practically no results of investigating specific features of their propagation and focusing in the terahertz frequency range. In the paper the physical features of free-space propagation and effects of moderate and sharp focusing of laser radiation beams are investigated both theoretically (based on the Rayleigh-Sommerfeld vector theory) and experimentally (using emission of a waveguide terahertz range (λ = 0.4326 mm) laser). The beams are excited by the modes of a dielectric resonator with a circular waveguide with different spatial polarization of the field. The obtained results improve the knowledge of specific features of propagation in different zones of diffraction and focusing of terahertz range laser beams.


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