Dispersion engineered AlGaAs-on-insulator nanophotonics by distributed feedback
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912652794527744 |
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| author | Talenti, Francesco Rinaldo Lovisolo, Luca Xiao, Zijun Saleh, Zeina Gerini, Andrea Alonso-Ramos, Carlos Morassi, Martina Lemaître, Aristide Wabnitz, Stefan De Rossi, Alfredo Leo, Giuseppe Vivien, Laurent |
| author_facet | Talenti, Francesco Rinaldo Lovisolo, Luca Xiao, Zijun Saleh, Zeina Gerini, Andrea Alonso-Ramos, Carlos Morassi, Martina Lemaître, Aristide Wabnitz, Stefan De Rossi, Alfredo Leo, Giuseppe Vivien, Laurent |
| contents | Technological advances in the fabrication of nanophotonic circuits have driven the scientific community to increasingly focus on the precise tailoring of their key optical properties, over a broadband spectral domain. In this context, the modulation of the local refractive index can be exploited to customize an effective reflectivity by the use of distributed Bragg mirrors, enabling the on-chip integration of Fabry-Pérot resonators. The resulting cavity length is strongly wavelength-dependent, offering practical solutions to the growing demand of dispersion engineering. Owing to their typically high core-to-cladding refractive index contrast and exceptional nonlinear properties, III-V semiconductor-based platforms represent promising candidates for the fabrication of Bragg reflectors. In this work, we propose an AlGaAs-on-insulator linear resonator based on distributed Bragg mirrors. We discuss the first experimental demonstration of a systematic, shape-constrained inverse design technique which tailors a prescribed dispersion profile, showing a strong agreement between simulations and measurements. In perspective, the proposed approach offers an efficient and general response to the challenge of dispersion engineering in integrated optical circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_14729 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dispersion engineered AlGaAs-on-insulator nanophotonics by distributed feedback Talenti, Francesco Rinaldo Lovisolo, Luca Xiao, Zijun Saleh, Zeina Gerini, Andrea Alonso-Ramos, Carlos Morassi, Martina Lemaître, Aristide Wabnitz, Stefan De Rossi, Alfredo Leo, Giuseppe Vivien, Laurent Optics Technological advances in the fabrication of nanophotonic circuits have driven the scientific community to increasingly focus on the precise tailoring of their key optical properties, over a broadband spectral domain. In this context, the modulation of the local refractive index can be exploited to customize an effective reflectivity by the use of distributed Bragg mirrors, enabling the on-chip integration of Fabry-Pérot resonators. The resulting cavity length is strongly wavelength-dependent, offering practical solutions to the growing demand of dispersion engineering. Owing to their typically high core-to-cladding refractive index contrast and exceptional nonlinear properties, III-V semiconductor-based platforms represent promising candidates for the fabrication of Bragg reflectors. In this work, we propose an AlGaAs-on-insulator linear resonator based on distributed Bragg mirrors. We discuss the first experimental demonstration of a systematic, shape-constrained inverse design technique which tailors a prescribed dispersion profile, showing a strong agreement between simulations and measurements. In perspective, the proposed approach offers an efficient and general response to the challenge of dispersion engineering in integrated optical circuits. |
| title | Dispersion engineered AlGaAs-on-insulator nanophotonics by distributed feedback |
| topic | Optics |
| url | https://arxiv.org/abs/2510.14729 |