Yan, JingshiOu, QingdongVincenti, Maria AntoniettaDe Angelis, CostantinoBao, QiaoliangNeshev, Dragomir2023-11-3015 - 19 SE978-1-943580-67-5http://hdl.handle.net/1885/307572We investigate the nonlinearity of PbI2 nanosheets by strain. Using the polarization and thickness dependence of the nonlinear harmonic emissions, we can precisely determine their thickness and crystalline orientation with a non-invasive optical technique.application/pdfen-AU© OSA 2019201910.1364/FIO.2019.JTu4A.552022-08-28