title: Gaussian-optics-based optical modeling and characterization of a Fabry-Perot microcavity for sensing applications.
abstract: A generalized study has been carried out on the modeling of a Fabry-Perot microcavity for sensing applications. Different analytical models on transmission characteristics of a Fabry-Perot microcavity are established by using plane-wave-based techniques, such as the Macleod characteristic matrix technique, the transfer matrix technique, and Smith's technique. A novel Gaussian-optics-based model for a Fabry-Perot microcavity illuminated by a laser beam is then developed and validated. The influence of laser beam waist on microcavity optical response is investigated, and the required minimal beam waist size is explored to ensure a useful optical response for sensing applications that can be accurately predicted by plane-wave optics. Also, the perturbations of microcavity performance induced by different types of microcavity mirror imperfections are discussed, based on the novel optical model. The prototype of the proposed Fabry-Perot microcavity for sensing applications has been successfully fabricated and characterized.
authors.affiliation: Centre for Mechanics of Micro-Systems, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798. pg01605642@ntu.edu.sg
authors.forename: Dagang
authors.initials: D
authors.lastname: Guo
authors.forename: Rongming
authors.initials: R
authors.lastname: Lin
authors.forename: Weijun
authors.initials: W
authors.lastname: Wang