Nonsymmetric evanescent coupling in photonics
arXiv:2407.18174 · doi:10.1103/PhysRevA.111.043510
Abstract
Asymmetrical interactions are ubiquitous in nature, and in physics their study becomes fundamental. Despite the prevalence of evanescent coupling in physics, little attention has been paid to wave function profiles, with symmetrical reciprocal interactions often assumed for practical reasons. This work challenges that assumption by analytically demonstrating the origin of nonsymmetrical coupling in a photonic platform, focusing on the behavior of evanescent tails from adjacent waveguides. We experimentally validate an asymmetrical dynamics by studying detuned photonic directional couplers, fabricated via femtosecond laser writing, and corroborate our findings through continuous numerical simulations.
6 pages, 3 figures
References in corpus (17)
- Topological Photonics
- Photonic Floquet Topological Insulators
- Edge states and topological invariants of non-Hermitian systems
- Exceptional Topology of Non-Hermitian Systems
- Silica-on-Silicon Waveguide Quantum Circuits
- Observation of bulk boundary correspondence breakdown in topolectrical circuits
- Efficient Light Funneling based on the non-Hermitian Skin Effect
- Non-Hermitian robust edge states in one-dimension: Anomalous localization and eigenspace condensation at exceptional points
- Observation of bound states in Lieb photonic lattices
- Non-Hermitian topological phenomena: A review
- Topological Non-Hermitian skin effect
- Experimental observation of Aharonov-Bohm cages in photonic lattices
- Perspective on topological states of non-Hermitian lattices
- Experimental multiphase estimation on a chip
- Complex Skin Modes in Non-Hermitian Coupled Laser Arrays
- Experimental observation of inter-orbital coupling
- Existence of a negative next-nearest-neighbor coupling in evanescently coupled dielectric waveguides