@article{LIU2022, 
author = {Yujian LIU and Cheng LI and Shangchun FAN and Xuefeng SONG},
title = {Effect of PMMA Removal Methods on Opto-Mechanical Behaviors of Optical Fiber Resonant Sensor With Graphene Diaphragm},
year = {2022},
journal = {Photonic Sensors},
volume = {12},
number = {2},
pages = {140-151},
keywords = {Graphene diaphragm, PMMA removal, opto-mechanical behavior, F-P resonator},
url = {https://www.sciopen.com/article/10.1007/s13320-021-0636-3},
doi = {10.1007/s13320-021-0636-3},
abstract = {Regarding the dependence of the treatment of removing polymethyl methacrylate (PMMA) from graphene upon the prestress in the film, two typical PMMA removal methods including acetone-vaporing and high-temperature annealing were investigated based on the opto-mechanical behaviors of the developed optical fiber Fabry-Perot (F-P) resonant sensor with a 125-μm diameter and ~10-layer-thickness graphene diaphragm. The measured resonant responses showed that the F-P sensor via annealing process exhibited the resonant frequency of 481kHz and quality factor of 1034 at ~2 Pa and room temperature, which are respectively 2.5 times and 33 times larger than the acetone-treated sensor. Moreover, the former achieved a high sensitivity of 110.4 kHz/kPa in the tested range of 2Pa–2.5kPa, apparently superior to the sensitivity of 16.2kHz/kPa obtained in the latter. However, the time drift of resonant frequency also mostly tended to occur in the annealed sensor, thereby shedding light on the opto-mechanical characteristics of graphene-based F-P resonant sensors, along with an optimized optical excitation and detection scheme.}
}