Mode-dependent phase in waveguides supporting orbital angular momentum
Year: 2026
Type: article
Abstract: We report experimental measurements of mode-dependent phase accumulation in waveguides supporting orbital angular momentum (OAM) modes. By analyzing the output phase profiles for different OAM states, we extracted relative phase shifts induced by variations in waveguide radius and refractive index contrast. We find that the phase shift depends on the modulus of the topological charge and is governed by the propagation constant, which is modulated by transverse confinement effects. These phase variations manifest as a rotation of the optical wavefront and are in excellent agreement with theoretical predictions. Our findings establish a passive and deterministic mechanism for mode-selective phase control in integrated photonic platforms, with direct implications for scalable high-dimensional quantum information processing and structured light-based optical communications.
Source: APL Photonics
DOI: 10.1063/5.0292980
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,750
Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Fundação de Amparo à Pesquisa do Estado de Alagoas, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Instituto Nacional de Ciência e Tecnologia de Informação Quântica, Air Force Office of Scientific Research
Awards: Quantum Rio network, G5580390735
OpenAlex ID: W7130349693