双折射
紫外线
透射率
光电子学
极化(电化学)
光学
平版印刷术
平面的
化学
材料科学
偏振器
物理
计算机科学
计算机图形学(图像)
物理化学
作者
Xinglong Chen,Bingbing Zhang,Fangfang Zhang,Ying Wang,Min Zhang,Zhihua Yang,Kenneth R. Poeppelmeier,Shilie Pan
摘要
Owing to their vital role in creating and controlling polarized light, birefringent materials are used extensively in various advanced optical systems which in turn impact a large, rapidly increasing range of applications in science and technology. Currently, the fairly small birefringence of MgF2 and the low transmittance of α-BaB2O4 (α-BBO) hinder their efficient application for wavelength below 200 nm. For example, deep-ultraviolet (DUV) birefringent materials for light polarization are urgently needed for DUV lithography. Here we demonstrate based on computational and experimental results that parallel chains of corner-connected planar sp2-hybridized BO3 groups found in Ca(BO2)2 effectively produce large birefringence. Ca(BO2)2 achieves three vital "best" properties including the shortest UV cutoff edge, the largest birefringence, and the highest laser-induced damage threshold (LIDT) compared to all the reported borate birefringent materials. On the basis of a Ca(BO2)2 single crystal, a DUV Glan polarizer has been realized and is more efficient than one constructed with commercially available MgF2.
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