Microsecond electro-optic switching in the nematic phase of a ferroelectric nematic liquid crystal
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| Format: | Preprint |
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2024
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| _version_ | 1866910677830991872 |
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| author | Thapa, Kamal Paladugu, Sathyanarayana Lavrentovich, Oleg D. |
| author_facet | Thapa, Kamal Paladugu, Sathyanarayana Lavrentovich, Oleg D. |
| contents | Nematic liquid crystals exhibit nanosecond electro-optic response to an applied electric field which modifies the degree of orientational order without realigning the molecular orientation. However, this nanosecond electrically-modified order parameter (NEMOP) effect requires high driving fields, on the order of 100 V/um for a modest birefringence change of 0.01. In this work, we demonstrate that a nematic phase of the recently discovered ferroelectric nematic materials exhibits a robust and fast electro-optic response. Namely, a relatively weak field of 20 V/um changes the birefringence by 0.04 with field-on and-off times around 1 us. This microsecond electrically modified order parameter (MEMOP) effect shows a greatly improved figure of merit when compared to other electro-optical switching modes in liquid crystals, including the conventional Frederiks effect, and has a potential for applications in fast electro-optical devices such as phase modulators, optical shutters, displays, and beam steerers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_22441 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Microsecond electro-optic switching in the nematic phase of a ferroelectric nematic liquid crystal Thapa, Kamal Paladugu, Sathyanarayana Lavrentovich, Oleg D. Soft Condensed Matter Nematic liquid crystals exhibit nanosecond electro-optic response to an applied electric field which modifies the degree of orientational order without realigning the molecular orientation. However, this nanosecond electrically-modified order parameter (NEMOP) effect requires high driving fields, on the order of 100 V/um for a modest birefringence change of 0.01. In this work, we demonstrate that a nematic phase of the recently discovered ferroelectric nematic materials exhibits a robust and fast electro-optic response. Namely, a relatively weak field of 20 V/um changes the birefringence by 0.04 with field-on and-off times around 1 us. This microsecond electrically modified order parameter (MEMOP) effect shows a greatly improved figure of merit when compared to other electro-optical switching modes in liquid crystals, including the conventional Frederiks effect, and has a potential for applications in fast electro-optical devices such as phase modulators, optical shutters, displays, and beam steerers. |
| title | Microsecond electro-optic switching in the nematic phase of a ferroelectric nematic liquid crystal |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2410.22441 |