TY - JOUR

T1 - Temperature Dependence of Terahertz Properties of Stoichiometric Lithium Tantalate

AU - Antsygin, V. D.

AU - Mamrashev, A. A.

AU - Maximov, L. V.

AU - Mikerin, S. L.

AU - Minakov, F. A.

AU - Nikolaev, N. A.

N1 - Funding Information: The work was supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment of the Institute of Automation and Electrometry SB RAS (study of the optical properties of lithium tantalate) and Novosibirsk State University project No. FSUS-2020–0029 (design and testing of thin-film terahertz polarizers). Publisher Copyright: © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

PY - 2022/12

Y1 - 2022/12

N2 - We studied terahertz (THz) optical and dielectric properties of stoichiometric lithium tantalate (sLT) from room down to liquid nitrogen temperature in the range of 0.15–1.8 THz using terahertz time-domain spectroscopy. Two-oscillator Lorentz models were fitted well to the crystal properties for both ordinary and extraordinary waves. We also studied changes in sLT ultraviolet (UV) absorption from room to liquid nitrogen temperature. The measurements showed a significant drop in absorption in both the THz and UV ranges with cooling. According to these results cooling should increase lithium tantalate potential in optical-to-terahertz conversion of high-power 800-nm radiation. The measured properties can be used in designing nonlinear optical conversion schemes and devices based on sLT.

AB - We studied terahertz (THz) optical and dielectric properties of stoichiometric lithium tantalate (sLT) from room down to liquid nitrogen temperature in the range of 0.15–1.8 THz using terahertz time-domain spectroscopy. Two-oscillator Lorentz models were fitted well to the crystal properties for both ordinary and extraordinary waves. We also studied changes in sLT ultraviolet (UV) absorption from room to liquid nitrogen temperature. The measurements showed a significant drop in absorption in both the THz and UV ranges with cooling. According to these results cooling should increase lithium tantalate potential in optical-to-terahertz conversion of high-power 800-nm radiation. The measured properties can be used in designing nonlinear optical conversion schemes and devices based on sLT.

KW - Absorption coefficient

KW - Dielectric permittivity

KW - LiTaO

KW - Lithium tantalate

KW - Lorentz model

KW - Refractive index

KW - Terahertz

KW - UV edge

KW - LiTaO3

UR - http://www.scopus.com/inward/record.url?scp=85143817345&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/e01208c2-7a89-361b-b679-92cae2581003/

U2 - 10.1007/s10762-022-00896-w

DO - 10.1007/s10762-022-00896-w

M3 - Article

AN - SCOPUS:85143817345

VL - 43

SP - 895

EP - 904

JO - Journal of Infrared, Millimeter, and Terahertz Waves

JF - Journal of Infrared, Millimeter, and Terahertz Waves

SN - 1866-6892

IS - 11-12

ER -