Designing an Excellent Deep-Ultraviolet Birefringent Material for Light Polarization

Xinglong Chen, Bingbing Zhang, Fangfang Zhang, Ying Wang, Min Zhang, Zhihua Yang*, Kenneth Poeppelmeier, Shilie Pan

*Corresponding author for this work

Research output: Contribution to journalArticle

98 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)16311-16319
Number of pages9
JournalJournal of the American Chemical Society
Issue number47
StatePublished - Nov 28 2018

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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