Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time
Photocurable monomer-doped liquid crystal (LC) cells were processed via holographic exposure using a low-power He–Ne laser to generate holographic polymer networks. The polymer network LC (PNLC) cells are used to fabricate infrared phase modulators at 1550 nm wavelength possessing favorable electro-...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-07-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/7/7/208 |
| _version_ | 1811300578907652096 |
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| author | Chun-Yu Chien Chia-Rong Sheu |
| author_facet | Chun-Yu Chien Chia-Rong Sheu |
| author_sort | Chun-Yu Chien |
| collection | DOAJ |
| description | Photocurable monomer-doped liquid crystal (LC) cells were processed via holographic exposure using a low-power He–Ne laser to generate holographic polymer networks. The polymer network LC (PNLC) cells are used to fabricate infrared phase modulators at 1550 nm wavelength possessing favorable electro-optical performance. Compared with our previous work, the percentages of ingredients in the LC mixture filled in PNLC cells underwent a slight change. The 2 wt% concentration of anisotropic monomer RM257 were in place of isotropic monomer N–vinyl–2–pyrrolidinone (NVP). As a result, the fabricated phase modulators also maintained well homogeneous LC alignments and optical-scattering-free characteristics. Furthermore, NVP dopant successfully reduced the operating voltages from 95 Vrms to 79 Vrms to prevent polymer network deformation when electrically operating with higher voltages. The fabricated infrared phase modulators had a good average response time (i.e., rising time of 0.88 ms and falling time of 0.40 ms). |
| first_indexed | 2024-04-13T06:53:22Z |
| format | Article |
| id | doaj.art-a20733b00891429298528454d7c8abaa |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-13T06:53:22Z |
| publishDate | 2017-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-a20733b00891429298528454d7c8abaa2022-12-22T02:57:20ZengMDPI AGCrystals2073-43522017-07-017720810.3390/cryst7070208cryst7070208Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response TimeChun-Yu Chien0Chia-Rong Sheu1Department of Photonics, National Cheng Kung University, Tainan 701, TaiwanDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanPhotocurable monomer-doped liquid crystal (LC) cells were processed via holographic exposure using a low-power He–Ne laser to generate holographic polymer networks. The polymer network LC (PNLC) cells are used to fabricate infrared phase modulators at 1550 nm wavelength possessing favorable electro-optical performance. Compared with our previous work, the percentages of ingredients in the LC mixture filled in PNLC cells underwent a slight change. The 2 wt% concentration of anisotropic monomer RM257 were in place of isotropic monomer N–vinyl–2–pyrrolidinone (NVP). As a result, the fabricated phase modulators also maintained well homogeneous LC alignments and optical-scattering-free characteristics. Furthermore, NVP dopant successfully reduced the operating voltages from 95 Vrms to 79 Vrms to prevent polymer network deformation when electrically operating with higher voltages. The fabricated infrared phase modulators had a good average response time (i.e., rising time of 0.88 ms and falling time of 0.40 ms).https://www.mdpi.com/2073-4352/7/7/208holographic exposureliquid crystalinfrared phase modulator |
| spellingShingle | Chun-Yu Chien Chia-Rong Sheu Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time Crystals holographic exposure liquid crystal infrared phase modulator |
| title | Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time |
| title_full | Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time |
| title_fullStr | Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time |
| title_full_unstemmed | Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time |
| title_short | Doping Liquid Crystal Cells with Photocurable Monomer via Holographic Exposure to Realize Optical-Scattering-Free Infrared Phase Modulators with Fast Response Time |
| title_sort | doping liquid crystal cells with photocurable monomer via holographic exposure to realize optical scattering free infrared phase modulators with fast response time |
| topic | holographic exposure liquid crystal infrared phase modulator |
| url | https://www.mdpi.com/2073-4352/7/7/208 |
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