학술논문
An Analytical Approach to Predict Maximal Sensitivity of Microring Resonators for Absorption Spectroscopy
Document Type
Periodical
Author
Source
Journal of Lightwave Technology J. Lightwave Technol. Lightwave Technology, Journal of. 37(21):5500-5506 Nov, 2019
Subject
Language
ISSN
0733-8724
1558-2213
1558-2213
Abstract
The different biosensing strategies with microring resonators consist in quantifying the resonance shift under the presence of biological or chemical agents. These strategies lead to the measurement of a wavelength shift or an output power variation correlated to the analyte concentration. The design guidelines to enhance the sensitivity have been already studied and reviewed over the past decade. However, very few studies have been published addressing ring resonator performance used as absorption micro-spectrometer, which can be explored with colorimetric chemistry and microfluidic handling. In this work, a sensitivity model for the operation of absorptive based ring resonators is presented. Such a model is proposed to provide a guideline to optimize ring resonator design and parameters. Finally, 2.5 FDTD simulations of different ring geometries are presented and compared to the results obtained with the model.