Инд. авторы:	Guo J., Xie J.-J., Li D.-J., Yang G.-L., Chen F., Wang C.-R., Zhang L.-M., Andreev Y.M., Kokh K.A., Lanskii G.V., Svetlichnyi V.A.
Заглавие:	Doped GaSe crystals for laser frequency conversion
Библ. ссылка:	Guo J., Xie J.-J., Li D.-J., Yang G.-L., Chen F., Wang C.-R., Zhang L.-M., Andreev Y.M., Kokh K.A., Lanskii G.V., Svetlichnyi V.A. Doped GaSe crystals for laser frequency conversion // Light: Science and Applications. - 2015. - Vol.4. - Iss. 12. - Art.e362. - ISSN 2095-5545. - EISSN 2047-7538.
Внешние системы:	DOI: 10.1038/lsa.2015.135; SCOPUS: 2-s2.0-84968543971; WoS: 000366726200002;
Реферат:	eng: In this review, we introduce the current stateof the artof the growth technology ofpure, lightly doped, and heavily doped (solid solution) nonlinear gallium selenide (GaSe) crystals that are able to generate broadband emission from the near infrared (IR) (0.8 mm) through the mid- and far-IR (terahertz (THz)) ranges and further into the millimeter wave (5.64 mm) range. For the first time, we show that appropriate doping is an efficient method controlling a range of the physical properties of GaSe crystals that are responsible for frequency conversion efficiency and exploitation parameters. After appropriate doping, uniform crystals grown by a modified technology with heat field rotation possess up to 3 times lower absorption coefficient in the main transparency window and THz range. Moreover, doping provides the following benefits: raises by up to 5 times the optical damage threshold; almost eliminates two-photon absorption; allows for dispersion control in the THz range independent of the mid-IR dispersion; and enables crystal processing in arbitrary directions due to the strengthened lattice. Finally, doped GaSe demonstrated better usefulness for processing compared with GaSe grown by the conventional technology and up to 15 times higher frequency conversion efficiency. © 2015 CIOMP. All rights reserved.
Ключевые слова:	THz; Solid solution crystal; GaSe; Frequency conversion;
Издано:	2015