Experimental observation of inter-orbital coupling

Inter-orbital coupling refers to the possibility of exciting orbital states by otherwise orthogonal non-interacting modes, a forbidden process in photonic lattices due to an intrinsic propagation constant detuning. In this work, using a femtosecond laser writing technique, we experimentally demonstr...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2021-09
Main Authors: Guzmán-Silva, Diego, Cáceres-Aravena, Gabriel, Vicencio, Rodrigo A
Format: Article
Language:English
Subjects:
Converters
Coupling
Lattices
Multiplexing
Photonics
Propagation
Solid phases
Trimers
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Inter-orbital coupling refers to the possibility of exciting orbital states by otherwise orthogonal non-interacting modes, a forbidden process in photonic lattices due to an intrinsic propagation constant detuning. In this work, using a femtosecond laser writing technique, we experimentally demonstrate that fundamental and excited orbital states can couple each other when located at different spatial positions. We perform a full characterization of an asymmetric double-well like potential and implement a scan method to effectively map the dynamics along the propagation coordinate. Our fundamental observation constitutes also a direct solution for a spatial mode converter device, which could be located in any position inside a photonic glass chip. By taking advantage of the phase structure of higher-order photonic modes and the effective negative coupling generated, we propose a trimer configuration as a phase beam splitter (\(\pi\)-BS), which could be of great relevance for multiplexing and interference-based photonic concatenated operations.
ISSN:2331-8422
DOI:10.48550/arxiv.2109.01756