Optical-induced dielectric tunability properties of DAST crystal in THz range<xref rid="cpb_28_12_127701fn1" ref-type="fn">*</xref><fn id="cpb_28_12_127701fn1"><label>*</label><p>Project supported by the National Basic Research Program of China (Grant No. 2015CB755403) and the National Natural Science Foundation of China (Grant Nos. 61775160, 61771332, 61705162, 51472251, and U1837202).</p></fn>

Optical-induced dielectric tunability properties of DAST crystal in THz range**

Project supported by the National Basic Research Program of China (Grant No. 2015CB755403) and the National Natural Science Foundation of China (Grant Nos. 61775160, 61771332, 61705162, 51472251, and U1837202).

Xu De-Gang^{1, 2}, Zhu Xian-Li^{1, 2}, Wang Yu-Ye^{1, 2, †}, Li Ji-Ning^{1, 2}, He Yi-Xin^{1, 2}, Pang Zi-Bo³, Cheng Hong-Juan³, Yao Jian-Quan^{1, 2}

(a) The refractive index and (b) extinction coefficient of DAST crystal excited by 532 nm laser at different power.