Two-photon absorption and non-resonant electronic nonlinearities of layered semiconductor TlGaS2 Xin, Xiufeng ; Liu, Fang ; Yan, Xiao-Qing ; Hui, Wangwei ; Zhao, Xin ; Gao, Xiaoguang ; Liu, Zhi-Bo ; Tian, Jian-Guo Abstract Publication: Optics Express Pub Date: December 2018 DOI: 10.1364/OE.26.033895 Bibcode: 2018OExpr..2633895X