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 FabryPerot 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.
Optical filter based on two coupled PhC GaAs-membranes / Stomeo, T.; Grande, Marco; Rainò, G.; Passaseo, A.; D'Orazio, Antonella; Cingolani, R.; Locatelli, A.; Modotto, D.; De Angelis, C.; De Vittorio, M.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 35:3(2010), pp. 411-413. [10.1364/OL.35.000411]
Optical filter based on two coupled PhC GaAs-membranes
GRANDE, Marco;D'ORAZIO, Antonella;
2010-01-01
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 FabryPerot 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
