Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material
The miniaturization of optical switches is a promising prospect with the use of phase-change materials (PCMs), and exploring various strategies to effectively integrate PCMs with integrated optical waveguides represents an intriguing research question. In this study, an ultra-compact integrated opti...
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1643 |
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| author | Kun Yin Yang Gao Hao Shi Shiqiang Zhu |
| author_facet | Kun Yin Yang Gao Hao Shi Shiqiang Zhu |
| author_sort | Kun Yin |
| collection | DOAJ |
| description | The miniaturization of optical switches is a promising prospect with the use of phase-change materials (PCMs), and exploring various strategies to effectively integrate PCMs with integrated optical waveguides represents an intriguing research question. In this study, an ultra-compact integrated optical switch based on PCM is proposed. This device consists of a Ge<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula>Sb<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula>Te<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula> nano-disk and an inverse-designed pixelated sub-wavelength structure. The pixelated sub-wavelength structure offers customized refractive indices that conventional materials or structures cannot achieve, leading to an improved insertion loss (IL) and extinction ratio (ER) performance of the device. Furthermore, this structure enhances the interaction between the optical field and GST, resulting in a reduction of the device size and the inserted GST footprint. With an ultra-compact device footprint of 0.9 µm × 1.5 µm, the simulation results exhibit a low IL of 0.45 dB, and a high ER of 18.0 dB at 1550 nm. Additionally, relevant studies show that this device is able to perform reliably despite minor variations in the manufacturing process. |
| first_indexed | 2024-03-11T03:26:14Z |
| format | Article |
| id | doaj.art-338e07f5b8ad4544bff5d55c3adf6d34 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:26:14Z |
| publishDate | 2023-05-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-338e07f5b8ad4544bff5d55c3adf6d342023-11-18T02:42:39ZengMDPI AGNanomaterials2079-49912023-05-011310164310.3390/nano13101643Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change MaterialKun Yin0Yang Gao1Hao Shi2Shiqiang Zhu3School of Mechanical Engineering, Zhejiang University, Hangzhou 310007, ChinaZhejiang Lab, Hangzhou 311112, ChinaZhejiang Lab, Hangzhou 311112, ChinaSchool of Mechanical Engineering, Zhejiang University, Hangzhou 310007, ChinaThe miniaturization of optical switches is a promising prospect with the use of phase-change materials (PCMs), and exploring various strategies to effectively integrate PCMs with integrated optical waveguides represents an intriguing research question. In this study, an ultra-compact integrated optical switch based on PCM is proposed. This device consists of a Ge<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula>Sb<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula>Te<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>5</mn></msub></semantics></math></inline-formula> nano-disk and an inverse-designed pixelated sub-wavelength structure. The pixelated sub-wavelength structure offers customized refractive indices that conventional materials or structures cannot achieve, leading to an improved insertion loss (IL) and extinction ratio (ER) performance of the device. Furthermore, this structure enhances the interaction between the optical field and GST, resulting in a reduction of the device size and the inserted GST footprint. With an ultra-compact device footprint of 0.9 µm × 1.5 µm, the simulation results exhibit a low IL of 0.45 dB, and a high ER of 18.0 dB at 1550 nm. Additionally, relevant studies show that this device is able to perform reliably despite minor variations in the manufacturing process.https://www.mdpi.com/2079-4991/13/10/1643integrated opticsoptical switchphase change materialsilicon photonics |
| spellingShingle | Kun Yin Yang Gao Hao Shi Shiqiang Zhu Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material Nanomaterials integrated optics optical switch phase change material silicon photonics |
| title | Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material |
| title_full | Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material |
| title_fullStr | Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material |
| title_full_unstemmed | Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material |
| title_short | Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material |
| title_sort | inverse design and numerical investigations of an ultra compact integrated optical switch based on phase change material |
| topic | integrated optics optical switch phase change material silicon photonics |
| url | https://www.mdpi.com/2079-4991/13/10/1643 |
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