材料科学
光学
钽酸盐
双折射
铁电性
激光器
波导管
极化(电化学)
飞秒
包层(金属加工)
光电子学
制作
相变
电介质
物理化学
病理
化学
冶金
替代医学
物理
医学
量子力学
作者
Pengfei Wu,Xiaorui Jiang,Bin Zhang,Shan He,Quanxin Yang,Xiaojin Li,Yingying Ren,Feng Chen,Hongliang Liu
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2020-08-06
卷期号:28 (17): 25633-25633
被引量:9
摘要
We report the fabrication of a hexagonal cladding waveguide by femtosecond laser direct writing (FLDW) in a potassium tantalate niobate (KTN) crystal with a large electric-optical effect. Confocal micro-Raman results show the laser-induced phase transition occurs in the filament areas during the waveguide fabrication. The small filaments can strongly confine the polar nanoregions especially in its ferroelectric state to enhance the waveguide birefringence, enabling excellent polarization maintaining features for both TE and TM-polarized light propagations. The temperature-dependent phase transition allows for an active control of waveguide polarization modes as well as a switchable polarization-maintaining feature.
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