Abstract
We demonstrate resonant guiding in a chalcogenide glass photonic crystal membrane. We observe strong resonances in the optical transmission spectra at normal incidence, associated with Fano coupling between free space and guided modes. We obtain good agreement with modeling results based on three-dimensional finite-difference time-domain simulations, and identify the guided modes near the centre of the first Brillouin zone responsible for the main spectral features.
Highlights
We demonstrate resonant guiding in a chalcogenide glass photonic crystal membrane
Two-dimensional (2D) photonic crystal (PhC) slabs have become a promising class of dielectric structure for micro- and nano-photonics
This work is the result of recent advances in chalcogenide glass photonic crystal membrane fabrication by focused ion beam (FIB) milling [21], and Fano resonance probing techniques [18]
Summary
Two-dimensional (2D) photonic crystal (PhC) slabs have become a promising class of dielectric structure for micro- and nano-photonics Their ability to control light at the wavelength scale [1,2] has already led to impressive demonstrations of various passive devices [3] and micro-lasers [4]. A chalcogenide glass serves as the strongly third-order nonlinear material (100-1000× that of silica) and 2D PhCs make use of the large refractive index (2.4-3.0) to resonantly enhance the field. In addition to reducing the switching power requirements, the pure Kerr-like nonlinearities offer the potential for near instantaneous response times (
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