Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming
A new dual-mode liquid-crystal (LC) micro-device constructed by incorporating a Fabry⁻Perot (FP) cavity and an arrayed LC micro-lens for performing simultaneous electrically adjusted filtering and zooming in infrared wavelength range is presented in this paper. The main micro-structure is...
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MDPI AG
2019-02-01
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| Online Access: | https://www.mdpi.com/2072-666X/10/2/137 |
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| author | Zhonglun Liu Mingce Chen Zhaowei Xin Wanwan Dai Xinjie Han Xinyu Zhang Haiwei Wang Changsheng Xie |
| author_facet | Zhonglun Liu Mingce Chen Zhaowei Xin Wanwan Dai Xinjie Han Xinyu Zhang Haiwei Wang Changsheng Xie |
| author_sort | Zhonglun Liu |
| collection | DOAJ |
| description | A new dual-mode liquid-crystal (LC) micro-device constructed by incorporating a Fabry⁻Perot (FP) cavity and an arrayed LC micro-lens for performing simultaneous electrically adjusted filtering and zooming in infrared wavelength range is presented in this paper. The main micro-structure is a micro-cavity consisting of two parallel zinc selenide (ZnSe) substrates that are pre-coated with ~20-nm aluminum (Al) layers which served as their high-reflection films and electrodes. In particular, the top electrode of the device is patterned by 44 × 38 circular micro-holes of 120 μm diameter, which also means a 44 × 38 micro-lens array. The micro-cavity with a typical depth of ~12 μm is fully filled by LC materials. The experimental results show that the spectral component with needed frequency or wavelength can be selected effectively from incident micro-beams, and both the transmission spectrum and the point spread function can be adjusted simultaneously by simply varying the root-mean-square value of the signal voltage applied, so as to demonstrate a closely correlated feature of filtering and zooming. In addition, the maximum transmittance is already up to ~20% according the peak-to-valley value of the spectral transmittance curves, which exhibits nearly twice the increment compared with that of the ordinary LC-FP filtering without micro-lenses. |
| first_indexed | 2024-12-11T10:45:46Z |
| format | Article |
| id | doaj.art-305b1a899fb24fc8af924451abb8f4e7 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-11T10:45:46Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-305b1a899fb24fc8af924451abb8f4e72022-12-22T01:10:29ZengMDPI AGMicromachines2072-666X2019-02-0110213710.3390/mi10020137mi10020137Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and ZoomingZhonglun Liu0Mingce Chen1Zhaowei Xin2Wanwan Dai3Xinjie Han4Xinyu Zhang5Haiwei Wang6Changsheng Xie7China-EU Institute for Clean and Renewable Energy, Huazhong University of Science & Technology, Wuhan 430074, ChinaNational Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science & Technology, Wuhan 430074, ChinaNational Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science & Technology, Wuhan 430074, ChinaNational Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science & Technology, Wuhan 430074, ChinaNational Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science & Technology, Wuhan 430074, ChinaNational Key Laboratory of Science and Technology on Multispectral Information Processing, Huazhong University of Science & Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science & Technology, Wuhan 430074, ChinaWuhan National Laboratory for Optoelectronics, Huazhong University of Science & Technology, Wuhan 430074, ChinaA new dual-mode liquid-crystal (LC) micro-device constructed by incorporating a Fabry⁻Perot (FP) cavity and an arrayed LC micro-lens for performing simultaneous electrically adjusted filtering and zooming in infrared wavelength range is presented in this paper. The main micro-structure is a micro-cavity consisting of two parallel zinc selenide (ZnSe) substrates that are pre-coated with ~20-nm aluminum (Al) layers which served as their high-reflection films and electrodes. In particular, the top electrode of the device is patterned by 44 × 38 circular micro-holes of 120 μm diameter, which also means a 44 × 38 micro-lens array. The micro-cavity with a typical depth of ~12 μm is fully filled by LC materials. The experimental results show that the spectral component with needed frequency or wavelength can be selected effectively from incident micro-beams, and both the transmission spectrum and the point spread function can be adjusted simultaneously by simply varying the root-mean-square value of the signal voltage applied, so as to demonstrate a closely correlated feature of filtering and zooming. In addition, the maximum transmittance is already up to ~20% according the peak-to-valley value of the spectral transmittance curves, which exhibits nearly twice the increment compared with that of the ordinary LC-FP filtering without micro-lenses.https://www.mdpi.com/2072-666X/10/2/137dual-mode liquid-crystal (LC) deviceinfrared Fabry–Perot (FP) filteringLC micro-lenses controlled electrically |
| spellingShingle | Zhonglun Liu Mingce Chen Zhaowei Xin Wanwan Dai Xinjie Han Xinyu Zhang Haiwei Wang Changsheng Xie Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming Micromachines dual-mode liquid-crystal (LC) device infrared Fabry–Perot (FP) filtering LC micro-lenses controlled electrically |
| title | Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming |
| title_full | Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming |
| title_fullStr | Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming |
| title_full_unstemmed | Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming |
| title_short | Research on a Dual-Mode Infrared Liquid-Crystal Device for Simultaneous Electrically Adjusted Filtering and Zooming |
| title_sort | research on a dual mode infrared liquid crystal device for simultaneous electrically adjusted filtering and zooming |
| topic | dual-mode liquid-crystal (LC) device infrared Fabry–Perot (FP) filtering LC micro-lenses controlled electrically |
| url | https://www.mdpi.com/2072-666X/10/2/137 |
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