Electrically tunable total reflection of light by oblique helicoidal cholesteric
| Autor: | Iadlovska, Olena S., Thapa, Kamal, Rajabi, Mojtaba, Mrukiewicz, Mateusz, Shiyanovskii, Sergij V., Lavrentovich, Oleg D. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | An oblique helicoidal state of a cholesteric liquid crystal (ChOH) is capable of continuous change of the pitch P in response to an applied electric field. Such a structure reflects 50% of the unpolarized light incident along the ChOH axis in the electrically tunable band determined by P/2. Here we demonstrate that at an oblique incidence of light, ChOH reflects 100% of light of any polarization. This singlet band of total reflection is associated with the full pitch P. We also describe the satellite P/2, P/3, and P/4 bands. The P/2 and P/4 bands are triplets while P/3 band is a singlet caused by multiple scatterings at P and P/2. A single ChOH cell acted upon by an electric field tunes all these bands in a very broad spectral range, from ultraviolet to infrared and beyond, thus representing a structural color device with enormous potential for optical and photonic applications. Comment: 34 pages including Supplementary Information; 6 figures in the main text and 2 figures in Supplementary Information |
| Databáze: | arXiv |
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