WebOct 21, 1998 · With the goal of designing materials that affect light in the way that semiconductors affect electrons, the researchers turned to photonic crystals. When silicon atoms are arranged in a crystal, some electron waves get through the matrix and some get reflected. This interference creates a range of energies where electrons cannot exist. WebApr 4, 2024 · In this letter, we propose a reflective photonic crystal (PhC) to generate vortex beam and demonstrate the superimposition of topological charges in the momentum space between PhC and the vortex beams. In addition to BICs, we demonstrate that other singularities like degenerate point can also be used to generate vortex beams.
Formation mechanism of guided resonances and bound states in …
WebApr 11, 2024 · On-chip light sources are an essential component of scalable photonic integrated circuits (PICs), and coupling between light sources and waveguides has attracted a great deal of attention. Photonic waveguides based on bound states in the continuum (BICs) allow optical confinement in a low-refractive-index waveguide on a high-refractive … WebBIC explored in a bilayer photonic crystal reveals that broken mirror-flip symmetry in the Z direction can give rise to high Q BIC states, which may suggest that our vertical thickness variation H of the nanoholes can impact the accidental BIC modes. 32 For D = 300 nm, the quasi-BIC formation first occurrs at H = 42 nm and more quasi-BIC ... sh vlan-switch
Tiny photonic crystals may light way to better optical circuit
WebAug 25, 2016 · This approach provides analytic insights to the formation mechanisms of these states: the guided resonances arise from the transverse Fabry–Pérot condition, and the divergence of the resonance lifetimes at the BICs is explained by a destructive interference of radiation from different propagating components inside the slab. WebOct 22, 2024 · Bound states in the continuum (BICs) in photonic crystal slabs are demonstrated as vortex eigenpolarization singularities in momentum space and the circular polarization points ( C points) are also obtained based on BICs, opening up more possibilities for exotic light scattering and various topological phenomena of singular … WebDec 9, 2013 · We investigate the formation of normal and abnormal photonic bound states in the continuum (BIC) from an analytical perspective. thepartsbiz discount codes