P‐190: Photo‐triggered Transmission‐color Through a Cholesteric Liquid Crystal for Multi‐level Information Encryption
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2024
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| author | Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu |
| author_facet | Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu |
| collection | Wiley Open Access |
| contents | P‐190: Photo‐triggered Transmission‐color Through a Cholesteric Liquid Crystal for Multi‐level Information Encryption Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu SID Symposium Digest of Technical Papers In this research, the house‐made transparent cell with a cell gap of 10 μm was made using one glass slide that coated with commercial polyimide and the other one coated by SD1 photo‐responsive molecules, and filled with CLCs made from E7 nematic LCs and 1.0% S811 doping in the pitch of 10 μm. The LCs on SD1 molecules coated slide thereafter were in‐plane switched clock‐wisely by means of linear polarized blue laser (λ=405nm) irradiation, and thus elongate the pitch and tune reflection of CLCs. As the reflection of incident light has an extremely large wavelength (~14×10 3 nm) and is hard to be detected, the structure change induced optical performance in CLCs by in‐plane switch of near‐slide LCs was identified by a polarized optical microscopy (POM) under the transmission mode. The cell inserted with CLCs was saw in purple initially, when the near‐slide LCs were clock‐wisely switched by π/4, 5π/12, 7π/12, 2π/3 and 5π/6, respectively, the cell turned to indigo, green, yellow, orange and pink accordingly. Alternatively, the induced pink cells can be counter‐tuned to their initial purple by anti‐clockwise laser irradiation. This observation suggests that the switching of near‐slip LCs is sufficient for optically encoding in CLCs and could have significant applications in displays, especially in a data‐hidden mode. 10.1002/sdtp.18021 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/sdtp.18021 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_sdtp_18021 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | P‐190: Photo‐triggered Transmission‐color Through a Cholesteric Liquid Crystal for Multi‐level Information Encryption Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu SID Symposium Digest of Technical Papers P‐190: Photo‐triggered Transmission‐color Through a Cholesteric Liquid Crystal for Multi‐level Information Encryption Yongguang Chen Guangjie Lin Xing Zhang Xiaohui Gong Yang Liu SID Symposium Digest of Technical Papers In this research, the house‐made transparent cell with a cell gap of 10 μm was made using one glass slide that coated with commercial polyimide and the other one coated by SD1 photo‐responsive molecules, and filled with CLCs made from E7 nematic LCs and 1.0% S811 doping in the pitch of 10 μm. The LCs on SD1 molecules coated slide thereafter were in‐plane switched clock‐wisely by means of linear polarized blue laser (λ=405nm) irradiation, and thus elongate the pitch and tune reflection of CLCs. As the reflection of incident light has an extremely large wavelength (~14×10 3 nm) and is hard to be detected, the structure change induced optical performance in CLCs by in‐plane switch of near‐slide LCs was identified by a polarized optical microscopy (POM) under the transmission mode. The cell inserted with CLCs was saw in purple initially, when the near‐slide LCs were clock‐wisely switched by π/4, 5π/12, 7π/12, 2π/3 and 5π/6, respectively, the cell turned to indigo, green, yellow, orange and pink accordingly. Alternatively, the induced pink cells can be counter‐tuned to their initial purple by anti‐clockwise laser irradiation. This observation suggests that the switching of near‐slip LCs is sufficient for optically encoding in CLCs and could have significant applications in displays, especially in a data‐hidden mode. 10.1002/sdtp.18021 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | P‐190: Photo‐triggered Transmission‐color Through a Cholesteric Liquid Crystal for Multi‐level Information Encryption |
| topic | SID Symposium Digest of Technical Papers |
| url | https://sid.onlinelibrary.wiley.com/doi/10.1002/sdtp.18021 |