title: Optical filter based on two coupled PhC GaAs-membranes.
abstract: We demonstrate an ultracompact optical filter based on two coupled high-index contrast GaAs photonic crystal (PhC) membranes. The PhC membranes consist of a square lattice of air holes and behave as a Fabry-Perot cavity whose reflectivity and transmissivity depend on the air gap between the two membranes. The normal-incidence reflectance measurements and the numerical simulation of reflection spectra show a high sensitivity to the geometrical parameters, such as the distance between the slabs, whose control would make the device suitable for a new class of tunable optical filters.
authors.affiliation: National Nanotechnology Laboratory of CNR/INFM, Distretto Tecnologico-ISUFI, Università del Salento,Via Arnesano, 73100 Lecce, Italy. tiziana.stomeo@unisalento.it
authors.forename: Tiziana
authors.initials: T
authors.lastname: Stomeo
authors.forename: Marco
authors.initials: M
authors.lastname: Grande
authors.forename: Gabriele
authors.initials: G
authors.lastname: Rainò
authors.forename: Adriana
authors.initials: A
authors.lastname: Passaseo
authors.forename: Antonella
authors.initials: A
authors.lastname: D'Orazio
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani
authors.forename: Andrea
authors.initials: A
authors.lastname: Locatelli
authors.forename: Daniele
authors.initials: D
authors.lastname: Modotto
authors.forename: Costantino
authors.initials: C
authors.lastname: De Angelis
authors.forename: Massimo
authors.initials: M
authors.lastname: De Vittorio
mesh_terms: D001152:Arsenicals / Q000737:chemistry*; D003198:Computer Simulation; D004867:Equipment Design / Q000295:instrumentation; D005708:Gallium / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008962:Models, Theoretical; D055096:Optical Devices; D055095:Optics and Photonics; D017785:Photons; D015203:Reproducibility of Results
chemical_list: D001152:Arsenicals; D008567:Membranes, Artificial; C043055:gallium arsenide; D005708:Gallium