An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories
We propose a novel hybrid mode interferometer (HMI) leveraging the interference of hybridized TE–TM modes in a silicon-on-insulator (SOI) waveguide integrated with a GeSe phase change material (PCM) layer. The SOI waveguide’s dimensions are optimized to support the hybridization of the fundamental t...
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| Format: | Article |
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AIP Publishing LLC
2025-04-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0245618 |
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| author | Ranjeet Dwivedi Fabio Pavanello Regis Orobtchouk |
| author_facet | Ranjeet Dwivedi Fabio Pavanello Regis Orobtchouk |
| author_sort | Ranjeet Dwivedi |
| collection | DOAJ |
| description | We propose a novel hybrid mode interferometer (HMI) leveraging the interference of hybridized TE–TM modes in a silicon-on-insulator (SOI) waveguide integrated with a GeSe phase change material (PCM) layer. The SOI waveguide’s dimensions are optimized to support the hybridization of the fundamental transverse magnetic (TM0) and the first higher transverse electric (TE1) mode. This design allows for efficient and nearly equal power coupling between these two modes, resulting in high-contrast interference when starting from the amorphous PCM state. The PCM’s phase transition induces a differential change in the modal effective index, enabling high-contrast transmittance modulation. Our numerical simulations demonstrate a multilevel transmission with a high contrast of nearly 14 dB when the amorphous region’s length is varied incrementally, enabling multi-bit storage. The transmittance is maximized in the fully crystalline state with an insertion loss below 0.1 dB. The HMI can also operate as a quasi-pure phase shifter when partially amorphized, making it suitable for Mach–Zehnder interferometers. These characteristics make the proposed device a promising candidate for applications in photonic memories and neuromorphic computing. |
| format | Article |
| id | doaj-art-9ecc09723fe34c0f95eefbe75550ff99 |
| institution | DOAJ |
| issn | 2166-532X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj-art-9ecc09723fe34c0f95eefbe75550ff992025-08-20T03:11:02ZengAIP Publishing LLCAPL Materials2166-532X2025-04-01134041123041123-910.1063/5.0245618An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memoriesRanjeet Dwivedi0Fabio Pavanello1Regis Orobtchouk2INSA Lyon, Ecole Centrale de Lyon, CNRS, Universite Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69621 Villeurbanne, FranceUniv. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, CROMA, 38000 Grenoble, FranceINSA Lyon, Ecole Centrale de Lyon, CNRS, Universite Claude Bernard Lyon 1, CPE Lyon, INL, UMR5270, 69621 Villeurbanne, FranceWe propose a novel hybrid mode interferometer (HMI) leveraging the interference of hybridized TE–TM modes in a silicon-on-insulator (SOI) waveguide integrated with a GeSe phase change material (PCM) layer. The SOI waveguide’s dimensions are optimized to support the hybridization of the fundamental transverse magnetic (TM0) and the first higher transverse electric (TE1) mode. This design allows for efficient and nearly equal power coupling between these two modes, resulting in high-contrast interference when starting from the amorphous PCM state. The PCM’s phase transition induces a differential change in the modal effective index, enabling high-contrast transmittance modulation. Our numerical simulations demonstrate a multilevel transmission with a high contrast of nearly 14 dB when the amorphous region’s length is varied incrementally, enabling multi-bit storage. The transmittance is maximized in the fully crystalline state with an insertion loss below 0.1 dB. The HMI can also operate as a quasi-pure phase shifter when partially amorphized, making it suitable for Mach–Zehnder interferometers. These characteristics make the proposed device a promising candidate for applications in photonic memories and neuromorphic computing.http://dx.doi.org/10.1063/5.0245618 |
| spellingShingle | Ranjeet Dwivedi Fabio Pavanello Regis Orobtchouk An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories APL Materials |
| title | An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories |
| title_full | An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories |
| title_fullStr | An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories |
| title_full_unstemmed | An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories |
| title_short | An ultra-low-loss compact phase-change material-based hybrid-mode interferometer for photonic memories |
| title_sort | ultra low loss compact phase change material based hybrid mode interferometer for photonic memories |
| url | http://dx.doi.org/10.1063/5.0245618 |
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