title: Tubular oxide microcavity with high-index-contrast walls: Mie scattering theory and 3D confinement of resonant modes.
abstract: Tubular oxide optical microcavities with thin walls (< 100 nm) have been fabricated by releasing pre-stressed Y2O3/ZrO2 bi-layered nanomembranes. Optical characterization demonstrates strong whispering gallery modes with a high quality-factor and fine structures in the visible range, which are due to their high-index-contrast property (high refractive index in thin walls). Moreover, the strong axial light confinement observed in rolled-up circular nanomembranes well agrees with our theoretical calculation by using Mie scattering theory. Novel material design and superior optical resonant properties in such self-rolled micro-tubular cavities promise many potential applications e.g. in optofluidic sensing and lasing.
authors.affiliation: Department of Materials Science, Fudan University, Shanghai 200433, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Wang
authors.forename: Tianrong
authors.initials: T
authors.lastname: Zhan
authors.forename: Gaoshan
authors.initials: G
authors.lastname: Huang
authors.forename: Xugao
authors.initials: X
authors.lastname: Cui
authors.forename: Xinhua
authors.initials: X
authors.lastname: Hu
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Mei
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008904:Miniaturization; D008962:Models, Theoretical; D010087:Oxides / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation
chemical_list: D010087:Oxides