Title :
Tunable optical nanocavity based on modulation of near-field coupling between subwavelength periodic nanostructures
Author :
Nakagawa, Wataru ; Fainman, Yeshaiahu
Author_Institution :
Inst. of Microtechnology, Univ. of Neuchatel, Switzerland
Abstract :
We present the design and analysis of a tunable resonant optical filter based on modulation of the near-field coupling between two subwavelength periodic nanostructures embedded in a Fabry-Pe´rot cavity. Due to the transverse localization of the optical field in the subwavelength gratings, their relative positioning strongly influences the near-field coupling between them and, thus, affects the resonance of the cavity. Rigorous electromagnetic analysis tools are applied to determine the optical characteristics of the filter with respect to the nanostructure lateral alignment, small variations in the shape of the nanostructures, and the physical separation of the nanostructures.
Keywords :
Fabry-Perot resonators; cavity resonators; diffraction gratings; integrated optics; integrated optoelectronics; micro-optics; micromechanical devices; nanotechnology; optical couplers; optical design techniques; optical filters; optical modulation; optical tuning; Fabry-Perot cavity; electromagnetic analysis; nanostructure lateral alignment; nanotechnology; optical MEMS; optical modulation; optical near-field coupling; optical resonators; subwavelength gratings; subwavelength periodic nanostructures; transverse localization; tunable optical nanocavity; tunable resonant optical filter; Nanostructures; Nonlinear optics; Optical coupling; Optical filters; Optical modulation; Optical resonators; Optical sensors; Photonic crystals; Resonance; Tunable circuits and devices; Nanotechnology; optical MEMS; optical filters; optical nanostructures; optical near-field coupling; optical near-field localization; optical propagation in nonhomogeneous media; optical resonators;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2004.828489
