期刊
OPTICAL MATERIALS
卷 51, 期 -, 页码 190-193出版社
ELSEVIER
DOI: 10.1016/j.optmat.2015.11.043
关键词
Optical waveguides; Femtosecond laser micromachining; Lithium tantalate crystal; Polarization-selective devices
资金
- National Natural Science Foundation of China [11274203]
- Junta de Castilla y Leon [SA086A12-2]
- Ministerio de Economia y Competitividad, Spain [FIS2013-44174-P]
A hybrid waveguiding structure has been fabricated in a z-cut lithium tantalate (LiTaO3) crystal wafer by direct femtosecond laser writing. Due to the laser-induced anisotropic modifications of the extraordinary and ordinary refractive indices (n(e) and n(o)) of LiTaO3 crystal, the structure exhibits polarization-sensitive guiding features along vertical and horizontal orientations. Based on this feature, circularly-polarized light beam can be converted to vertically-/horizontally-polarized ones (i.e., TE and TM), with approximately 1:1 power splitting ratio. The well-guided performance of the polarization-sensitive structure shows the potential for integration with existing light signals to realize all-optical information processing. (C) 2015 Published by Elsevier B.V.
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