Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure
Wide-spectral and polarization-sensitive photodetectors are vital for applications in imaging, communication, and intelligent sensing. Although two-dimensional (2D) materials have shown great promise in enhancing the performance of these devices, conventional methods for spectral discrimination ofte...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Chip |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2709472325000176 |
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| author | Ling Bai Ziting Yang Jie Wen Zifeng Mai Bin Liu Duanyang Liu Penghong Ci Liyuan Liu Yiyang Xie Ziqi Zhou Yali Yu Zhongming Wei |
| author_facet | Ling Bai Ziting Yang Jie Wen Zifeng Mai Bin Liu Duanyang Liu Penghong Ci Liyuan Liu Yiyang Xie Ziqi Zhou Yali Yu Zhongming Wei |
| author_sort | Ling Bai |
| collection | DOAJ |
| description | Wide-spectral and polarization-sensitive photodetectors are vital for applications in imaging, communication, and intelligent sensing. Although two-dimensional (2D) materials have shown great promise in enhancing the performance of these devices, conventional methods for spectral discrimination often rely on complex designs, such as external filters or multisensor systems, increasing system cost and complexity. Developing simplified devices that integrate spectral and polarization detection remains a key challenge. Here, we demonstrated a 2D MoTe2/GeSe-based photodetector with wide-spectral photoresponse (400 to 1064 nm) and polarization sensitivity, achieving a responsivity of 1.35 A W−1 and a polarization ratio of 2.23 under 808 nm illumination. The device exhibited a unique 90° polarization reversal between green (532 nm) and red (808 nm), providing a novel mechanism for spectral discrimination. First-principles calculations reveal the polarization reversal phenomenon based on the heterostructure's optical anisotropy. Furthermore, integration with a convolutional neural network enables intelligent traffic signal recognition using polarization-sensitive images. This work highlights the potential of MoTe2/GeSe heterostructures for next-generation photodetectors, offering compact, multifunctional solutions with integrated spectral and polarization discrimination capabilities. |
| format | Article |
| id | doaj-art-09e9f5c5b48f4ed7896c080e37014d2b |
| institution | OA Journals |
| issn | 2709-4723 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chip |
| spelling | doaj-art-09e9f5c5b48f4ed7896c080e37014d2b2025-08-20T02:37:06ZengElsevierChip2709-47232025-09-014310014310.1016/j.chip.2025.100143Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructureLing Bai0Ziting Yang1Jie Wen2Zifeng Mai3Bin Liu4Duanyang Liu5Penghong Ci6Liyuan Liu7Yiyang Xie8Ziqi Zhou9Yali Yu10Zhongming Wei11School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, ChinaState Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, ChinaState Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaSchool of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China; Corresponding authors.State Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaState Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, ChinaKey Laboratory of Optoelectronics Technology, Beijing University of Technology, Ministry of Education, Beijing 100124, ChinaState Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Corresponding authors.School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China; Corresponding authors.State Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors.Wide-spectral and polarization-sensitive photodetectors are vital for applications in imaging, communication, and intelligent sensing. Although two-dimensional (2D) materials have shown great promise in enhancing the performance of these devices, conventional methods for spectral discrimination often rely on complex designs, such as external filters or multisensor systems, increasing system cost and complexity. Developing simplified devices that integrate spectral and polarization detection remains a key challenge. Here, we demonstrated a 2D MoTe2/GeSe-based photodetector with wide-spectral photoresponse (400 to 1064 nm) and polarization sensitivity, achieving a responsivity of 1.35 A W−1 and a polarization ratio of 2.23 under 808 nm illumination. The device exhibited a unique 90° polarization reversal between green (532 nm) and red (808 nm), providing a novel mechanism for spectral discrimination. First-principles calculations reveal the polarization reversal phenomenon based on the heterostructure's optical anisotropy. Furthermore, integration with a convolutional neural network enables intelligent traffic signal recognition using polarization-sensitive images. This work highlights the potential of MoTe2/GeSe heterostructures for next-generation photodetectors, offering compact, multifunctional solutions with integrated spectral and polarization discrimination capabilities.http://www.sciencedirect.com/science/article/pii/S2709472325000176Anisotropic optical transitionWide-spectralPolarization-sensitivity2D photodetectorIntelligent recognition |
| spellingShingle | Ling Bai Ziting Yang Jie Wen Zifeng Mai Bin Liu Duanyang Liu Penghong Ci Liyuan Liu Yiyang Xie Ziqi Zhou Yali Yu Zhongming Wei Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure Chip Anisotropic optical transition Wide-spectral Polarization-sensitivity 2D photodetector Intelligent recognition |
| title | Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure |
| title_full | Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure |
| title_fullStr | Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure |
| title_full_unstemmed | Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure |
| title_short | Polarization reversal enhanced intelligent recognition in two-dimensional MoTe2/GeSe heterostructure |
| title_sort | polarization reversal enhanced intelligent recognition in two dimensional mote2 gese heterostructure |
| topic | Anisotropic optical transition Wide-spectral Polarization-sensitivity 2D photodetector Intelligent recognition |
| url | http://www.sciencedirect.com/science/article/pii/S2709472325000176 |
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