Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application
Neuromorphic computing is inevitable in addressing the computing challenges faced by the current computing architecture. A nonvolatile process is one of the key elements in realizing a neuromorphic architecture. Realization of a photonic nonvolatile state has been a challenge. Germanium antimony tel...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-05-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0257237 |
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| author | Rakshitha Kallega Roopali Shekhawat K. Ramesh Shankar Kumar Selvaraja |
| author_facet | Rakshitha Kallega Roopali Shekhawat K. Ramesh Shankar Kumar Selvaraja |
| author_sort | Rakshitha Kallega |
| collection | DOAJ |
| description | Neuromorphic computing is inevitable in addressing the computing challenges faced by the current computing architecture. A nonvolatile process is one of the key elements in realizing a neuromorphic architecture. Realization of a photonic nonvolatile state has been a challenge. Germanium antimony telluride (GST) offers potential electrical and optical characteristics to realize an optical nonvolatile state through a material phase transition. In this work, we demonstrate controlled phase tuning of a thermally evaporated GST-integrated silicon ring-resonator for potential neuromorphic application. We present material characterization and device fabrication and correlate the electrical and photonic phase transitions of ring-integrated GST. The temperature cycling in temperature-dependent resistance measurement shows the feasibility of pinning the phase of the transition region, which could be exploited for multiple non-volatile states. Using a simple device architecture, we have exploited the non-volatile and gradual transition of thermally evaporated GST to access intermediate states, which can be realized as synaptic weights in neural networks. |
| format | Article |
| id | doaj-art-d4d7f6a94ce347ab8e0e4a7bf86e31a5 |
| institution | DOAJ |
| issn | 2166-532X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj-art-d4d7f6a94ce347ab8e0e4a7bf86e31a52025-08-20T03:18:56ZengAIP Publishing LLCAPL Materials2166-532X2025-05-01135051104051104-810.1063/5.0257237Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic applicationRakshitha Kallega0Roopali Shekhawat1K. Ramesh2Shankar Kumar Selvaraja3Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, IndiaDepartment of Physics, Indian Institute of Science, Bangalore, IndiaDepartment of Physics, Indian Institute of Science, Bangalore, IndiaCentre for Nano Science and Engineering, Indian Institute of Science, Bangalore, IndiaNeuromorphic computing is inevitable in addressing the computing challenges faced by the current computing architecture. A nonvolatile process is one of the key elements in realizing a neuromorphic architecture. Realization of a photonic nonvolatile state has been a challenge. Germanium antimony telluride (GST) offers potential electrical and optical characteristics to realize an optical nonvolatile state through a material phase transition. In this work, we demonstrate controlled phase tuning of a thermally evaporated GST-integrated silicon ring-resonator for potential neuromorphic application. We present material characterization and device fabrication and correlate the electrical and photonic phase transitions of ring-integrated GST. The temperature cycling in temperature-dependent resistance measurement shows the feasibility of pinning the phase of the transition region, which could be exploited for multiple non-volatile states. Using a simple device architecture, we have exploited the non-volatile and gradual transition of thermally evaporated GST to access intermediate states, which can be realized as synaptic weights in neural networks.http://dx.doi.org/10.1063/5.0257237 |
| spellingShingle | Rakshitha Kallega Roopali Shekhawat K. Ramesh Shankar Kumar Selvaraja Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application APL Materials |
| title | Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application |
| title_full | Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application |
| title_fullStr | Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application |
| title_full_unstemmed | Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application |
| title_short | Controlled crystallization of thermal evaporated GST-on-SOI for photonic neuromorphic application |
| title_sort | controlled crystallization of thermal evaporated gst on soi for photonic neuromorphic application |
| url | http://dx.doi.org/10.1063/5.0257237 |
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