%0 Journal Article
%A Wu, Xiaojun
%A Zhou, Chun
%A Huang, Wenqian Ronny
%A Ahr, Frederike
%A Kärtner, Franz X.
%T Temperature dependent refractive index and absorption coefficient of congruent lithium niobate crystals in the terahertz range
%J Optics express
%V 23
%N 23
%@ 1094-4087
%C Washington, DC
%I Soc.
%M PUBDB-2015-04552
%P 29729 - 29737
%D 2015
%X Optical rectification with tilted pulse fronts in lithium niobate crystals is one of the most promising methods to generate terahertz (THz) radiation. In order to achieve higher optical-to-THz energy efficiency, it is necessary to cryogenically cool the crystal not only to decrease the linear phonon absorption for the generated THz wave but also to lengthen the effective interaction length between infrared pump pulses and THz waves. However, the refractive index of lithium niobate crystal at lower temperature is not the same as that at room temperature, resulting in the necessity to re-optimize or even re-build the tilted pulse front setup. Here, we performed a temperature dependent measurement of refractive index and absorption coefficient on a 6.0 mol
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000366611500041
%$ pmid:26698455
%R 10.1364/OE.23.029729
%U https://bib-pubdb1.desy.de/record/276321