title: GaN microwires as optical microcavities: whispering gallery modes Vs Fabry-Perot modes.
abstract: GaN microwires grown by metalorganic vapour phase epitaxy and with radii typically on the order of 1-5 micrometers exhibit a number of resonances in their photoluminescence spectra. These resonances include whispering gallery modes and transverse Fabry-Perot modes. A detailed spectroscopic study by polarization-resolved microphotoluminescence, in combination with electron microscopy images, has enabled to differentiate both kinds of modes and determined their main spectral properties. Finally, the dispersion of the ordinary and extraordinary refractive indices of strain-free GaN in the visible-UV range has been obtained thanks to the numerical simulation of the observed modes.
authors.affiliation: Department of Materials Science, Fudan University, Shanghai 200433, China.
authors.forename: Pierre-Marie
authors.initials: PM
authors.lastname: Coulon
authors.forename: Maxime
authors.initials: M
authors.lastname: Hugues
authors.forename: Blandine
authors.initials: B
authors.lastname: Alloing
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Beraudo
authors.forename: Mathieu
authors.initials: M
authors.lastname: Leroux
authors.forename: Jesus
authors.initials: J
authors.lastname: Zuniga-Perez
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D007368:Interferometry / Q000295:instrumentation*; D008904:Miniaturization; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: C473348:gallium nitride; D005708:Gallium