期刊
PHYSICAL REVIEW E
卷 94, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.94.042705
关键词
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资金
- NSF [DMR-1307674, DMR-1410378, DMR-0084173]
- AFOSR [FA9550-12-1-0037]
- State of Florida
- U.S. Department of Energy
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1410378] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1307674] Funding Source: National Science Foundation
We present studies of chiral nematic liquid crystals composed of flexible dimer molecules subject to large dc magnetic fields between 0 and 31 T. We observe that these fields lead to selective reflection of light depending on temperature and magnetic field. The band of reflected wavelengths can be tuned from ultraviolet to beyond the IR-C band. A similar effect induced by electric fields has been presented previously, and was explained by a field-induced oblique-heliconical director deformation in accordance with early theoretical predictions. The use of magnetic field here instead of electric field allows precise measurements of some material constants and holds promise for wireless tuning of selective reflection.
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