Unidirectional guided resonances in anisotropic waveguides
| Autor: | Samyobrata Mukherjee, David Artigas, Lluis Torner, Jordi Gomis-Bresco |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Fotònica, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. FOTONICA - Grup de Recerca de Fotònica |
| Rok vydání: | 2021 |
| Předmět: |
Planar waveguides
Phase (waves) Lithium niobate waveguides FOS: Physical sciences 02 engineering and technology Radiation Surface emitting lasers 01 natural sciences Optical measurements law.invention 010309 optics Optics Planar law 0103 physical sciences Comunicacions òptiques Anisotropy Light propagation Physics Optical vortices Vorticitat Física [Àrees temàtiques de la UPC] business.industry Wave guides Nanoelectronics 021001 nanoscience & nanotechnology Cladding (fiber optics) Vortex-motion Atomic and Molecular Physics and Optics Wavelength Nanophotonics Polar 0210 nano-technology business Light wavelength Waveguide Physics - Optics Optics (physics.optics) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| DOI: | 10.48550/arxiv.2105.08409 |
| Popis: | We show that anisotropic planar anti-guiding waveguide structures with two radiation channels toward the surrounding cladding materials can support unidirectional guided resonances (UGRs), where radiation is canceled in one of the radiation channels and redirected into the other. Their formation is subtle as it requires breaking the so-called polar anisotropy-symmetry of the structures. Then, UGRs appear at specific wavelengths and light propagation directions, are robust, and are characterized by phase singularities in the channel in which radiation is canceled. The mechanism we describe allows for ready selection of the radiation direction, as well as tuning of the wavelength and the propagation angle at which UGRs occur. H2020 Marie Sklodowska-Curie Action GA665884; Government of Spain (grants PGC2018-097035-B-I00; Severo Ochoa CEX2019-000910-S); Fundació Cellex; Fundació Mir-Puig; Generalitat de Catalunya (CERCA and AGAUR 2017-SGR-1400). |
| Databáze: | OpenAIRE |
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