Título
Hybrid waveguiding structure in LiTaO3 crystal fabricated by direct femtosecond laser writing
Autor(es)
Palabras clave
Optical waveguides
Femtosecond laser micromachining
Lithium tantalate crystal
Polarization-selective devices
Fecha de publicación
2016-01
Citación
Cheng, C., Jia, Y., de Aldana, J. R. V., Tan, Y., & Chen, F. (2016). Hybrid waveguiding structure in LiTaO3 crystal fabricated by direct femtosecond laser writing. Optical Materials, 51, 190-193. https://doi.org/10.1016/j.optmat.2015.11.043
Resumen
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 (ne and no) 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.
URI
ISSN
0925-3467
DOI
10.1016/j.optmat.2015.11.043
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