摘要
表面等离子体激元(SPP)微腔具有很高的品质因子和极小的模式体积,在光电子器件研究方面具有重要的应用价值。采用有限元法对表面等离子体激元的金属覆盖介质微盘谐振腔进行理论模拟,研究考虑微盘底半径、介质层厚度及金属膜厚度等参数对微盘表面等离子体模的品质因子及模体积的影响。研究表明,在光通信波段1550nm附近获得高品质因子(1000以上),极低模式体积的表面等离子体微盘。最后研究了利用优化设计的微盘进行折射率传感的应用,获得了高达300nm/RIU的折射率传感灵敏度。
Surface plasmon polaritions microcavities have attracted considerable attention due to their high quality factor,ultra-small mode volume and wide applications in optoelectronic devices.A kind of surface plasmon polaritions metal-coated microdisk resonator is theoretically simulated and optimized by using finite element method.The quality factor and mode volume of the plasmonic mode of the microdisk are theoretically investigated by considering different parameters of the microdisk such as the bottom radius,the thickness of dielectric,and the thickness of metal coating.High quality factor（〉1000）,ultra-small mode volume surface plasmon polaritions microcavities are achieved for the optical telecommunication wavelength around 1550 nm.Finally,a refractive index sensing application of the optimized microdisk is also investigated,which achieves a high sentivity of 300 nm/RIU.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2012年第7期148-153,共6页
Acta Optica Sinica
基金
浙江省自然科学基金(Y1100041)
浙江省重点科技创新团队(2010R50007)
浙江师范大学创新团队和信息功能材料国家重点实验室开放课题资助课题
关键词
激光技术
光学微腔
回音壁模式
表面等离子体激元
有限元法
laser technique
optical microcavity
whispering gallery mode
surface plasmon polaritions
finiteelement method
