摘要
建立了金属反射薄膜与六角晶格光子晶体平板的微腔结构,利用时域有限差分法进行了腔的Q值、谐振波长、场强和辐射带宽的研究。结果显示,金和银形成的反射薄膜在保持腔内场分布不变的情况下,对光子晶体平板微腔的Q值可提高～100倍。同时,谐振波长随着空气间隙的增大而产生红移,而腔内谐振波长的辐射线宽可限制在～7nm。该结构可以为制备单模微型激光发射源的提供理论指导。
A microcavity structure, which consists of metal reflective film and hexagonal lattice photonic crystal slab was presented. Finite difference time domain method was employed to calculate the quality factor, resonance wavelength,field intensity and emission linewidth of the cavity. The results show that in the condition of constant field distribution ,the gold - and silver -film can increase the Q factor of photonic crystal slab 100 -fold. In addi- tion, the resonance wavelength occured redshift with the increase of air gap and the emission linewidth was limited to -7nm. This paper can be applied to the fabrication of point emitter with single mode operation.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第S01期84-87,共4页
Infrared and Laser Engineering
基金
国家自然科学基金(61172044)
河北省自然科学基金(F2012203204)
关键词
金属
光子晶体微腔
Q值
谐振波长
空气间隙
metal
photonic crystal microcavity
Q factor
resonance wavelength
air gap
