Abstract
A photonic crystal nanobeam cavity(M-PCNC)with a structure incorporating a mixture of diamond-shaped and circular air holes is pro-posed.The performance of the cavity is simulated and studied theoretically.Using the finite-difference time-domain method,the parameters of the M-PCNC,including cavity thickness and width,lattice constant,and radii and numbers of holes,are optimized,with the quality factor Q and mode volume Vm as performance indicators.Mutual modulation of the lattice constant and hole radius enable the proposed M-PCNC to realize outstanding performance.The optimized cavity possesses a high quality factor Q=1.45 × 105 and an ultra-small mode volume Vm=0.01(A/n)[Zeng et al.,Opt Lett 2023:48;3981-3984]in the telecommunications wavelength range.Light can be progres-sively squeezed in both the propagation direction and the perpendicular in-plane direction by a series of interlocked anti-slots and slots in the diamond-shaped hole structure.Thereby,the energy can be confined within a small mode volume to achieve an ultra-high Q/Vm ratio.
基金项目
Open Fund of the State Key Laboratory of Advanced Optical Communication Systems and Networks(SJTU)(2023GZKF018)
Open Fund of IPOC(BUPT)(IPOC2021B03)
国家自然科学基金(11974188)
中国博士后科学基金(2021T140339)
中国博士后科学基金(2018M632345)
Jiangsu Province Postdoctoral Science Foundation(2021K617C)
Postgraduate Research and Practice Innovation Program of Jiangsu Province(KYCX22_0945)
江苏省"青蓝工程"项目()
国家科技期刊平台
NSTL
万方数据