Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit
Undesirable light scattering is a fundamental cause for photon loss in nanophotonics. Rayleigh backscattering can be particularly difficult to avoid in wave-guiding systems and arises from both material defects and geometric defects at the subwavelength scale. It has recently been shown that systems...
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-01-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2023-0431 |
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| author | Örsel Oğulcan E. Noh Jiho Bahl Gaurav |
| author_facet | Örsel Oğulcan E. Noh Jiho Bahl Gaurav |
| author_sort | Örsel Oğulcan E. |
| collection | DOAJ |
| description | Undesirable light scattering is a fundamental cause for photon loss in nanophotonics. Rayleigh backscattering can be particularly difficult to avoid in wave-guiding systems and arises from both material defects and geometric defects at the subwavelength scale. It has recently been shown that systems exhibiting chiral dispersion due to broken time-reversal symmetry (TRS) can naturally mitigate Rayleigh backscattering, yet this has never been explored in integrated photonics. Here we demonstrate the dynamic suppression of disorder-induced Rayleigh backscattering in integrated photonics even when defects are clearly present. Our experiments are performed using lithium niobate on insulator resonators in which TRS is broken through an electrically-driven acousto-optic interaction. We experimentally observe near-complete suppression of Rayleigh backscattering within the resonator by measuring the optical states and through direct measurements of the back-scattered light. We additionally provide a new and intuitive generalization argument that explains this suppression of backscattering as a form of topological protection in synthetic space. |
| format | Article |
| id | doaj-art-5e3daafc52c04b48b42018e380d3d99c |
| institution | Kabale University |
| issn | 2192-8606 2192-8614 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-5e3daafc52c04b48b42018e380d3d99c2024-11-25T11:19:10ZengDe GruyterNanophotonics2192-86062192-86142024-01-0113217318110.1515/nanoph-2023-0431Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuitÖrsel Oğulcan E.0Noh Jiho1Bahl Gaurav2Department of Electrical & Computer Engineering, Urbana, USADepartment of Mechanical Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, IL61801, USADepartment of Mechanical Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, IL61801, USAUndesirable light scattering is a fundamental cause for photon loss in nanophotonics. Rayleigh backscattering can be particularly difficult to avoid in wave-guiding systems and arises from both material defects and geometric defects at the subwavelength scale. It has recently been shown that systems exhibiting chiral dispersion due to broken time-reversal symmetry (TRS) can naturally mitigate Rayleigh backscattering, yet this has never been explored in integrated photonics. Here we demonstrate the dynamic suppression of disorder-induced Rayleigh backscattering in integrated photonics even when defects are clearly present. Our experiments are performed using lithium niobate on insulator resonators in which TRS is broken through an electrically-driven acousto-optic interaction. We experimentally observe near-complete suppression of Rayleigh backscattering within the resonator by measuring the optical states and through direct measurements of the back-scattered light. We additionally provide a new and intuitive generalization argument that explains this suppression of backscattering as a form of topological protection in synthetic space.https://doi.org/10.1515/nanoph-2023-0431acousto-opticstime-reversal symmetry breakingintegrated photonicschiral dispersionbackscatteringrayleigh scattering |
| spellingShingle | Örsel Oğulcan E. Noh Jiho Bahl Gaurav Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit Nanophotonics acousto-optics time-reversal symmetry breaking integrated photonics chiral dispersion backscattering rayleigh scattering |
| title | Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit |
| title_full | Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit |
| title_fullStr | Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit |
| title_full_unstemmed | Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit |
| title_short | Electrically-controlled suppression of Rayleigh backscattering in an integrated photonic circuit |
| title_sort | electrically controlled suppression of rayleigh backscattering in an integrated photonic circuit |
| topic | acousto-optics time-reversal symmetry breaking integrated photonics chiral dispersion backscattering rayleigh scattering |
| url | https://doi.org/10.1515/nanoph-2023-0431 |
| work_keys_str_mv | AT orselogulcane electricallycontrolledsuppressionofrayleighbackscatteringinanintegratedphotoniccircuit AT nohjiho electricallycontrolledsuppressionofrayleighbackscatteringinanintegratedphotoniccircuit AT bahlgaurav electricallycontrolledsuppressionofrayleighbackscatteringinanintegratedphotoniccircuit |