Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy
Fostered by the recent advancements in photonic technologies, the need for all-optical dynamic control on complex photonic elements is emerging as more and more relevant, especially in integrated photonics and metasurface-based flat-optics. In this framework, optically-induced anisotropy has been pr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-02-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2022-0609 |
| _version_ | 1827968996293476352 |
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| author | Marcucci Niccolò Giordano Maria Caterina Zambito Giorgio Troia Adriano Buatier de Mongeot Francesco Descrovi Emiliano |
| author_facet | Marcucci Niccolò Giordano Maria Caterina Zambito Giorgio Troia Adriano Buatier de Mongeot Francesco Descrovi Emiliano |
| author_sort | Marcucci Niccolò |
| collection | DOAJ |
| description | Fostered by the recent advancements in photonic technologies, the need for all-optical dynamic control on complex photonic elements is emerging as more and more relevant, especially in integrated photonics and metasurface-based flat-optics. In this framework, optically-induced anisotropy has been proposed as powerful mean enabling tuning functionalities in several planar architectures. Here, we design and fabricate an anisotropic two-dimensional bull’s eye cavity inscribed within an optically-active polymeric film spun on a one-dimensional photonic crystal sustaining Bloch surface waves (BSW). Thanks to the cavity morphology, two surface resonant modes with substantially orthogonal polarizations can be coupled within the cavity from free-space illumination. We demonstrate that a dynamic control on the resonant mode energies can be easily operated by modulating the orientation of the optically-induced birefringence on the surface, via a polarized external laser beam. Overall, reversible blue- and red-shifts of the resonant BSWs are observed within a spectral range of about 2 nm, with a moderate laser power illumination. The polymeric structure is constituted by a novel blend of an azopolymer and a thermally-sensitive resist, which allows a precise patterning via thermal scanning probe lithography, while providing a significant structural integrity against photo-fluidization or mass-flow effects commonly occurring in irradiated azopolymers. The proposed approach based on tailored birefringence opens up new pathways to finely control the optical coupling of localized surface modes to/from free-space radiation, particularly in hybrid organic–inorganic devices. |
| first_indexed | 2024-04-09T18:31:13Z |
| format | Article |
| id | doaj.art-c0d28596494d481db4cee5be98ececaf |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-04-09T18:31:13Z |
| publishDate | 2023-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-c0d28596494d481db4cee5be98ececaf2023-04-11T17:07:18ZengDe GruyterNanophotonics2192-86142023-02-011261091110410.1515/nanoph-2022-0609Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropyMarcucci Niccolò0Giordano Maria Caterina1Zambito Giorgio2Troia Adriano3Buatier de Mongeot Francesco4Descrovi Emiliano5Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, ItalyDipartimento di Fisica, Università di Genova, Via Dodecaneso 33, Genova, 16146, ItalyDipartimento di Fisica, Università di Genova, Via Dodecaneso 33, Genova, 16146, ItalyIstituto Nazionale di Ricerca Metrologica (INRiM), Strada delle Cacce 91, Torino10135, ItalyDipartimento di Fisica, Università di Genova, Via Dodecaneso 33, Genova, 16146, ItalyDipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, 10129, ItalyFostered by the recent advancements in photonic technologies, the need for all-optical dynamic control on complex photonic elements is emerging as more and more relevant, especially in integrated photonics and metasurface-based flat-optics. In this framework, optically-induced anisotropy has been proposed as powerful mean enabling tuning functionalities in several planar architectures. Here, we design and fabricate an anisotropic two-dimensional bull’s eye cavity inscribed within an optically-active polymeric film spun on a one-dimensional photonic crystal sustaining Bloch surface waves (BSW). Thanks to the cavity morphology, two surface resonant modes with substantially orthogonal polarizations can be coupled within the cavity from free-space illumination. We demonstrate that a dynamic control on the resonant mode energies can be easily operated by modulating the orientation of the optically-induced birefringence on the surface, via a polarized external laser beam. Overall, reversible blue- and red-shifts of the resonant BSWs are observed within a spectral range of about 2 nm, with a moderate laser power illumination. The polymeric structure is constituted by a novel blend of an azopolymer and a thermally-sensitive resist, which allows a precise patterning via thermal scanning probe lithography, while providing a significant structural integrity against photo-fluidization or mass-flow effects commonly occurring in irradiated azopolymers. The proposed approach based on tailored birefringence opens up new pathways to finely control the optical coupling of localized surface modes to/from free-space radiation, particularly in hybrid organic–inorganic devices.https://doi.org/10.1515/nanoph-2022-0609azopolymersbirefringencebloch surface wavesthermal-scanning probe lithographytunable nano-photonics |
| spellingShingle | Marcucci Niccolò Giordano Maria Caterina Zambito Giorgio Troia Adriano Buatier de Mongeot Francesco Descrovi Emiliano Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy Nanophotonics azopolymers birefringence bloch surface waves thermal-scanning probe lithography tunable nano-photonics |
| title | Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy |
| title_full | Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy |
| title_fullStr | Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy |
| title_full_unstemmed | Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy |
| title_short | Spectral tuning of Bloch Surface Wave resonances by light-controlled optical anisotropy |
| title_sort | spectral tuning of bloch surface wave resonances by light controlled optical anisotropy |
| topic | azopolymers birefringence bloch surface waves thermal-scanning probe lithography tunable nano-photonics |
| url | https://doi.org/10.1515/nanoph-2022-0609 |
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