Two-photon absorption of Tl_1-xIn_1-xSn_xSe₂ nanocrystallites

¹ Department of Solid State Physics, Eastern European University, 13 Voli Ave., Lutsk 43025, Ukraine
² Department of Inorganic and Physical Chemistry, Eastern European National University, 13 Voli Ave., Lutsk 43025, Ukraine
³ Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
⁴ Center for Microelectronics and Nanotechnology. University of Rzeszow, 35-959 Rzeszów, Poland
⁵ Institute of Physics, J. Dlugosz University, Armi Krajowej 13/15, Czestochowa, Poland
⁶ Electrical Engineering Department, Czestochowa University of Technology, Armi Krajowej 17, Czestochowa, Poland

^* Corresponding author: siergiej.prokhorenko@gmail.com

Published online: 15 December 2016

Abstract

Novel materials for the infrared two-photon absorption — Tl_1-xIn_1-xSn_xSe₂ single crystals (x = 0.1,0.2) were grown. Two-photon absorption (TPA) was studied at CO₂ laser wave-length 9.4μm with pulse duration 1μs. The studies were performed at different temperatures and for the nanocrystallite sizes varying within the 7–200 nm. The studies have shown that the TPA may be enhanced during the decrease of the nanocrystallite sizes below 50–60 nm. There exists also some critical x value at which the TPA value begin substantially to increase. The studied nanocrystallites are relatively stable to the infrared laser treatment and are not hygroscopic which allow to use them in different IR optoelectronic devices.