摘要
基于不同结构的光子晶体具有不同禁带范围的特性,设计了一种光子晶体偏振光分束器,通过平面波展开法与时域有限差分法进行数值计算与模拟分析。结果表明,该分束器能够实现电磁波的高效分束:波长为1.5～1.58μm范围内电磁波入射时,TE模和TM模的透射率均高于92%;尤其是波长为1.55μm的电磁波入射时,TE模透射率可达95.5%,TM模透射率可达99%。同时,其尺寸仅为10μm×11.5μm。这些特性使其具有良好的应用前景。
The design of a polarization beam splitter（PBS） is presented according to different band gaps with different photonic crystals. The splitting properties of the PBS are numerically simulated and analyzed by using the finite-difference time-domain method and the plane wave expansion method. It is shown that a highly efficient splitting for TE mode and TM mode can be achieved. The transmission probability is above 92% for both TE mode and TM mode while the incident wave is Gaussian and the wavelength range is 1.5～1.58 μm. Especially the transmission probability can reach 95.5% for TE mode and 99% for TM mode the 1.55 μm Gaussian incidence. Meanwhile, its size is only 10 μm×11.5 μm. The PBS makes a promising candidate in the future integrated optical circuit.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第6期158-162,共5页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11247277)
山西省自然科学基金(2011011003-1)资助课题
关键词
光电子学
光子晶体偏振光分束器
平面波展开法
时域有限差分法
optoelectronics
photonic crystal polarization beam splitter
plane wave expansion method
finite difference time domain method
