Abstract
In this work, the pressure control of Fano resonance is presented, the proposed structure is composed of a MIM metal insulator metal ) waveguide side coupled to a rectangle resonator, and the rectang le resonator is filled with photo elastic material which can tune the Fano resonance by pressure. The transmittance and sensing performance is calculated by two dimensional finite difference time domain method. The Fano resonance is originated from the cou pling between the ultra narrow discrete states and the broad continua state. In the proposed system, the discrete state is from the side coupled
rectangle resonator and the continua state is from the stub resonator. The asymmetrical Fano linestyle can be tuned by changing the pressure to the silicon or the structure parameters. The sharp transmission spectrum contributes to a high efficient plasmonic pressure sensor, which can yield a linear sensitivity of 15 nm/GPa. The proposed plasmonic structure
may hav e application in the slow light device, nanoscale filter, all optical switch and pressure sensor.
Keywords
Surface plasmon polariton, Rectangle resonator, Fano resonance, Pressure sensing.
Citation
R. YU, F. CHEN, S. WU, R. BI, Plasmonic pressure sensor based on Fano resonance assisted by photo elastic material, Optoelectronics and Advanced Materials - Rapid Communications, 14, 1-2, January-February 2020, pp.6-12 (2020).
Submitted at: July 12, 2019
Accepted at: Feb. 17, 2020