Photon recycling in Fabry-Perot micro-cavities based on Si3N4 waveguides

Year: 2006

Authors: Riboli F., Recati A., Daldosso N., Pavesi L., Pucker G., Lui A., Cabrini S., Di Fabrizio E.

Autors Affiliation: Univ Trent, Dept Phys, I-38050 Trento, Italy; INFM, CRS, BEC, I-38050 Trento, Italy; IRST, ITC, Microsyst Div, I-38050 Trento, Italy; LILIT Beamline, INFM, TASC Lab, I-34012 Trieste, Italy.

Abstract: We present a numerical analysis and preliminary experimental results on one-dimensional Fabry-Perot micro-cavities in Si3N4 waveguides. The Fabry-Perot micro-cavities are formed by two distributed Bragg reflectors separated by a straight portion of a waveguide. The Bragg reflectors are composed of a few air slits produced within the Si3N4 waveguides. In order to increase the quality factor of the micro-cavities, we have minimized, with a multiparametric optimization tool, the insertion loss of the reflectors by varying the length of their first pairs (those facing the cavity). To explain the simulation results, the coupling of the fundamental waveguide mode with radiative modes in the Fabry-Perot micro-cavities is needed. This effect is described as a recycling of radiative modes in the waveguide. To support the modelling, preliminary experimental results of micro-cavities in Si3N4 waveguides realized with the focused ion beam technique are reported. (c) 2006 Elsevier B.V. All rights reserved.

Journal/Review: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS

Volume: 4 (1)      Pages from: 41  to: 46

More Information: We acknowledge the financial support by MIUR through FIRB (RBNE01P4JF and RBNE012N3X) and COFIN (2004023725) projects and by PAT through PROFILL project.
KeyWords: waveguide photonic crystals; Fabry-Perot micro-cavities; engineered mirrors; recycling of leaky modes
DOI: 10.1016/j.photonics.2005.12.001

Citations: 7
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
References taken from IsiWeb of Knowledge: (subscribers only)