Quantum cutting localaized emission from the excitons in photonic crystals fabricated by femtosecond laser

报道了在Li +/B3+组成比为1：2的1/3Li 2 O2/3B 2 O3（LTB）玻璃和Li 2B 4 O 7（LTB）晶体以及Li +/B3+组成比为1：3的1/4Li 2 O3/4 B2 O3（LBO）玻璃和LiB 3 O 5（LBO）晶体中制备纳米孔阵列。采用飞秒激光烧蚀（W = 775 nm）制备了纳米孔，FE-SEM图像显示LBO和LTB玻璃上形成了直径为亚波长的圆柱形纳米孔，而LTB和LBO晶体上形成了具有亚波长边缘的Almos四边形纳米孔。随着脉冲能量的减小，孔洞尺寸减小。在LTB和LBO玻璃上观察到的纳米孔的直径D分别为3 W/5- 4 W/5和9 W/10- 14 W/5，并且在LTB和LBO晶体上的四边形纳米孔的边长分别为W/5- 3 W/10和W/4- 3 W/2。在LTB和LBO晶体上的四边形孔的形态被认为反映了它们各自的四方晶系和正交晶系晶胞。

We report the fabrication of nanohole arrays in 1/3Li2O-2/3B2O3 (LTB)glass and a Li2B4O7 (LTB) crystal with the same Li+/B3+ composition ratio of1:2, and in 1/4Li2O-3/4B2O3 (LBO) glass and a LiB3O5 (LBO) crystal with the same Li+/B3+ composition ratio of 1:3. Nanoholes were fabricated using femtosecond laser ablation (W = 775 nm).The FE-SEM images reveal the formation of cylindrical nanoholes with subwavelength diameters on the LBO and LTB glasses, whereas almos quadrangular nanoholes with subwavelength edges were formed on the LTB and LBO crystals. The hole size decreased with decreasing pulse energy. The observed diameter D of the nanoholes on the LTB and LBO glasses was 3W/5-4W/5 and 9W/10-14W/5 , respectively, and the edge length of the quadrangular nanoholes on the LTB and LBO crystals was W/5-3W/10 and W/4-3W/2, respectively. The morphology of the quadrangular holes on the LTB and LBO crystals is considered to reflect their respective tetragonal and orthorhombic unit cells.