Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm
We investigate an optical phase shifter based on Ge2Sb2Te5 (GST) integrated with a Si waveguide at mid-infrared (MIR) wavelengths. Since the optical absorption of both amorphous and crystalline GST can be reduced at a longer wavelength, we demonstrate that the optical loss of the phase shifter can b...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171483 |
| _version_ | 1811694569521152000 |
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| author | Miyatake, Yuto Ho, Chong Pei Pitchappa, Prakash Singh, Ranjan Makino, Kotaro Tominaga, Junji Miyata, Noriyuki Nakano, Takashi Toprasertpong, Kasidit Takagi, Shinichi Takenaka, Mitsuru |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Miyatake, Yuto Ho, Chong Pei Pitchappa, Prakash Singh, Ranjan Makino, Kotaro Tominaga, Junji Miyata, Noriyuki Nakano, Takashi Toprasertpong, Kasidit Takagi, Shinichi Takenaka, Mitsuru |
| author_sort | Miyatake, Yuto |
| collection | NTU |
| description | We investigate an optical phase shifter based on Ge2Sb2Te5 (GST) integrated with a Si waveguide at mid-infrared (MIR) wavelengths. Since the optical absorption of both amorphous and crystalline GST can be reduced at a longer wavelength, we demonstrate that the optical loss of the phase shifter can be reduced at MIR wavelengths. The measured optical loss per π phase shift of a phase-change material (PCM) phase shifter at 2.32 µm wavelength is 2.6 dB/π, which is more than 80 times smaller than that at 1.55 µm wavelength (21.7 dB/π) and more than 5 times smaller than that at 1.92 µm wavelength (9.7 dB/π). Moreover, resonance wavelength tuning of an add-drop micro-ring resonator using a PCM phase shifter at 2.32 µm wavelength is demonstrated owing to the low-loss optical phase shift. These findings reinforce the applicability of the approach toward a low-loss optical phase shifter based on PCMs operating at MIR wavelengths on a Si photonic platform for quantum computing, sensing, and optical communication. |
| first_indexed | 2024-10-01T07:09:40Z |
| format | Journal Article |
| id | ntu-10356/171483 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:09:40Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1714832023-10-30T15:35:08Z Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm Miyatake, Yuto Ho, Chong Pei Pitchappa, Prakash Singh, Ranjan Makino, Kotaro Tominaga, Junji Miyata, Noriyuki Nakano, Takashi Toprasertpong, Kasidit Takagi, Shinichi Takenaka, Mitsuru School of Physical and Mathematical Sciences Engineering::Electrical and electronic engineering Circuit Optical Phase Shifter We investigate an optical phase shifter based on Ge2Sb2Te5 (GST) integrated with a Si waveguide at mid-infrared (MIR) wavelengths. Since the optical absorption of both amorphous and crystalline GST can be reduced at a longer wavelength, we demonstrate that the optical loss of the phase shifter can be reduced at MIR wavelengths. The measured optical loss per π phase shift of a phase-change material (PCM) phase shifter at 2.32 µm wavelength is 2.6 dB/π, which is more than 80 times smaller than that at 1.55 µm wavelength (21.7 dB/π) and more than 5 times smaller than that at 1.92 µm wavelength (9.7 dB/π). Moreover, resonance wavelength tuning of an add-drop micro-ring resonator using a PCM phase shifter at 2.32 µm wavelength is demonstrated owing to the low-loss optical phase shift. These findings reinforce the applicability of the approach toward a low-loss optical phase shifter based on PCMs operating at MIR wavelengths on a Si photonic platform for quantum computing, sensing, and optical communication. Published version This work was funded by Japan Society for the Promotion of Science (JP20H02198, JP21J20272); Japan Science and Technology Agency (JPMJCR2004); Ministry of Education, Culture, Sports, Science and Technology (JPMXP09A21UT0093, JPMXP09F21UT0021). 2023-10-26T04:00:39Z 2023-10-26T04:00:39Z 2022 Journal Article Miyatake, Y., Ho, C. P., Pitchappa, P., Singh, R., Makino, K., Tominaga, J., Miyata, N., Nakano, T., Toprasertpong, K., Takagi, S. & Takenaka, M. (2022). Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm. Optical Materials Express, 12(12), 4582-4593. https://dx.doi.org/10.1364/OME.473987 2159-3930 https://hdl.handle.net/10356/171483 10.1364/OME.473987 2-s2.0-85145222713 12 12 4582 4593 en Optical Materials Express © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Circuit Optical Phase Shifter Miyatake, Yuto Ho, Chong Pei Pitchappa, Prakash Singh, Ranjan Makino, Kotaro Tominaga, Junji Miyata, Noriyuki Nakano, Takashi Toprasertpong, Kasidit Takagi, Shinichi Takenaka, Mitsuru Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title | Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title_full | Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title_fullStr | Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title_full_unstemmed | Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title_short | Non-volatile compact optical phase shifter based on Ge₂Sb₂Te₅ operating at 2.3 μm |
| title_sort | non volatile compact optical phase shifter based on ge₂sb₂te₅ operating at 2 3 μm |
| topic | Engineering::Electrical and electronic engineering Circuit Optical Phase Shifter |
| url | https://hdl.handle.net/10356/171483 |
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