Optical filter based on two coupled PhC GaAs-membranes.
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.
Stomeo
Tiziana
T
National Nanotechnology Laboratory of CNR/INFM, Distretto Tecnologico-ISUFI, Università del Salento,Via Arnesano, 73100 Lecce, Italy. tiziana.stomeo@unisalento.it
Grande
Marco
M
Rainò
Gabriele
G
Passaseo
Adriana
A
D'Orazio
Antonella
A
Cingolani
Roberto
R
Locatelli
Andrea
A
Modotto
Daniele
D
De Angelis
Costantino
C
De Vittorio
Massimo
M
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
D001152:Arsenicals; D008567:Membranes, Artificial; C043055:gallium arsenide; D005708:Gallium