Modulation of Fano-like resonance in spherical microbubble cavity for high sensitivity pressure sensing
Wenyao Liu, Rong Wang, Wei Li, Bo Zhang, Enbo Xing, Yanru Zhou, Peng Sun, Jianjun Chen, Jun Tang, Jun Liu
Abstract
Abstract In this paper, we demonstrate a simple scheme to achieve Fano-like and electromagnetically induced transparency (EIT) like resonance by changing the coupling position of a high- Q spherical microbubble cavity with tapered fiber. The evolution processes of the Fano-like and EIT-like spectrums are explored from simulation and experiment, which are in good agreement. And a high sensitivity pressure sensor based on Fano-like resonance is realized. It shows that compared with the slopes of the Lorentz lineshape, Fano-like and EIT-like lineshapes are increased by 2.7 and 20.7 times, respectively. It provides a simple method for ultra-high sensitive sensing.