#OEA_highlight High-efficiency infrared upconversion imaging with nonlinear silicon metasurfaces empowered by quasi-bound states in the continuum doi.org/10.29026/oea... by #Jumin_Qiu #Qiegen_Liu #Shuyuan_Xiao @NCUniv1921 #infrared #upconversion #imaging #nonlinear #metasurfaces #BIC