诺共振
电磁感应透明
谐振器
共振(粒子物理)
光学
物理
铌酸锂
法诺平面
波导管
光子学
波长
光电子学
联轴节(管道)
材料科学
等离子体子
原子物理学
数学
纯数学
冶金
作者
Tingge Yuan,Xueyi Wang,Jiangwei Wu,Hao Li,Yuping Chen,Xianfeng Chen
标识
DOI:10.1002/lpor.202400457
摘要
Abstract Corresponding to the different phase‐shifts of the interference modes, the whispering gallery mode resonator‐based Fano resonance exhibits a variety of unique spectral lineshapes that can be applied to sensing, optical signal processing, and so on. However, most approaches to lineshape tuning aim to alter the propagation phase‐shift or coupling strength, and generally suffer from relatively low efficiency and limited tuning range. In this paper, with a carefully designed waveguide‐taper coupled micro‐ring resonator structure and the assistance with the grating‐coupler, for the first time a near full‐lineshape selectivity of the Fano resonance is demonstrated in two isolated tuning dimensions of the frequency and transverse space, which means arbitrary lineshapes including the Lorentzian‐dip, asymmetric Fano peak or electromagnetically‐induced‐transparency (EIT)‐like peak can be obtained at a specific resonance wavelength in the whole C‐band. In addition to the different types of line shapes, the extinction ratio can also be enhanced by dynamically tuning the coupling position. This research provides an efficient approach to manipulate the transmission spectra of the Fano resonance, which is of great importance in promoting its further applications on integrated photonics platforms.
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