Инд. авторы:	Antsygin V.D., Mamrashev A.A., Nikolaev N.A., Potaturkin O.I., Bekker T.B., Solntsev V.P.
Заглавие:	Optical properties of borate crystals in terahertz region
Библ. ссылка:	Antsygin V.D., Mamrashev A.A., Nikolaev N.A., Potaturkin O.I., Bekker T.B., Solntsev V.P. Optical properties of borate crystals in terahertz region // Optics Communications. - 2013. - Vol.309. - P.333-337. - ISSN 0030-4018.
Внешние системы:	DOI: 10.1016/j.optcom.2013.08.014; SCOPUS: 2-s2.0-84883335369;
Реферат:	eng: In this paper we study the optical properties of a family of borate crystals comprising alpha and beta barium borates, barium fluoroborate, lithium triborate, and lithium tetraborate in the frequency range from 0.3 to 2.0 THz. We extract the refractive indices and absorption coefficients for both ordinary and extraordinary beams from terahertz time-domain spectroscopy data. All of the investigated crystals exhibit substantial birefringence and dichroism, which qualifies them as potential materials for terahertz polarization-optical devices. We also find an additional absorption band in barium borate crystals, which is not defined by the group of phonon modes lying above 2 THz. We argue that this phenomenon may be caused by excessive sodium atoms and ions in the crystal lattice. © 2013 Elsevier B.V.
Ключевые слова:	Borate crystals; Dichroism; Polarization optics; Terahertz spectroscopy; Absorption co-efficient; Terahertz spectroscopy; Refractive index; Polarization; Lithium; Birefringence; Birefringence; Barium compounds; Terahertz time domain spectroscopy; Potential materials; Polarization optics; Lithium tetraborate; Borate crystals; Beta barium borate; Barium borate crystal; Dichroism;
Издано:	2013
Физ. характеристика:	с.333-337