Selective Passive Tuning of Cavity Resonance by Mode Index Engineering of the Partial Length of a Cavity
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909325070434304 |
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| author | Khurana, Mohit Delfan, Sahar Yi, Zhenhuan |
| author_facet | Khurana, Mohit Delfan, Sahar Yi, Zhenhuan |
| contents | Cavities in large-scale photonic integrated circuits often suffer from a wider distribution of resonance frequencies due to fabrication errors. It is crucial to adjust the resonances of cavities using post-processing methods to minimize the frequency distribution. We have developed a concept of passive tuning by manipulating the mode index of a portion of a microring cavity. Through analytical studies and numerical experiments, we have found that depositing a thin film of dielectric material on top of the cavity or etching the material enables us to fine-tune the resonances and minimize the frequency distribution. This versatile method allows for the selective tuning of each cavity's resonance in a large set of cavities in a single fabrication step, providing robust passive tuning in large-scale photonic integrated circuits. We show that proposed method achieves tuning resolution below 1/Q and range upto 10^3/Q for visible to near-infrared wavelengths. Furthermore, this method can be applied and explored in various optical cavities and material configurations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_04422 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Selective Passive Tuning of Cavity Resonance by Mode Index Engineering of the Partial Length of a Cavity Khurana, Mohit Delfan, Sahar Yi, Zhenhuan Optics Applied Physics Atomic and Molecular Clusters Cavities in large-scale photonic integrated circuits often suffer from a wider distribution of resonance frequencies due to fabrication errors. It is crucial to adjust the resonances of cavities using post-processing methods to minimize the frequency distribution. We have developed a concept of passive tuning by manipulating the mode index of a portion of a microring cavity. Through analytical studies and numerical experiments, we have found that depositing a thin film of dielectric material on top of the cavity or etching the material enables us to fine-tune the resonances and minimize the frequency distribution. This versatile method allows for the selective tuning of each cavity's resonance in a large set of cavities in a single fabrication step, providing robust passive tuning in large-scale photonic integrated circuits. We show that proposed method achieves tuning resolution below 1/Q and range upto 10^3/Q for visible to near-infrared wavelengths. Furthermore, this method can be applied and explored in various optical cavities and material configurations. |
| title | Selective Passive Tuning of Cavity Resonance by Mode Index Engineering of the Partial Length of a Cavity |
| topic | Optics Applied Physics Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2409.04422 |