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29 August 2019 Pseudo-dielectric relaxation-enabled electrothermal tuning of reflective color in a soft chiral photonic crystal
Po-Chang Wu, Guan-Wei Wu, Wei Lee
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Proceedings Volume 11092, Liquid Crystals XXIII; 1109202 (2019) https://doi.org/10.1117/12.2526099
Event: SPIE Organic Photonics + Electronics, 2019, San Diego, California, United States
Abstract
Many published papers bear flaw information caused by misinterpreting the pseudo-dielectric relaxation in liquid crystal (LC) confined in thin cells. The pseudo-dielectric relaxation stems from the cell geometries or parameters, which should not be misrecognized as an inherent material property of the LC. In this work, we explored the pseudo-dielectric relaxation and demonstrated an unconventional tuning means to electrically manipulate the reflective color of a typical cholesteric LC cell based on the heating due to the pseudo-dielectric relaxation. A tuning range in the full-color spectrum can be easily achieved by a limited temperature change of merely a few degrees Celsius.
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Po-Chang Wu, Guan-Wei Wu, and Wei Lee "Pseudo-dielectric relaxation-enabled electrothermal tuning of reflective color in a soft chiral photonic crystal", Proc. SPIE 11092, Liquid Crystals XXIII, 1109202 (29 August 2019); https://doi.org/10.1117/12.2526099
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KEYWORDS
Dielectrics
Electrodes
Photonic crystals
Liquid crystals
Temperature metrology
Infrared cameras
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