Electro-optic Kerr effect in polymer-stabilized isotropic liquid crystals

2011 ◽  
Vol 98 (2) ◽  
pp. 023502 ◽  
Author(s):  
Young-Cheol Yang ◽  
Deng-Ke Yang
2010 ◽  
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Miyoung Kim ◽  
Byeong Gyun Kang ◽  
Min Su Kim ◽  
Mi-Kyung Kim ◽  
Myong-Hoon Lee ◽  
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2016 ◽  
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pp. 081107
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B. Atorf ◽  
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G. Nordendorf ◽  
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H. Kitzerow

2011 ◽  
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Jin Yan ◽  
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Meizi Jiao ◽  
Yan Li ◽  
Hui-Chuan Cheng ◽  
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2010 ◽  
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pp. 071105 ◽  
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Sebastian Gauza ◽  
Yan Li ◽  
Meizi Jiao ◽  
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Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 746 ◽  
Author(s):  
Kyung Min Lee ◽  
Ecklin P. Crenshaw ◽  
Mariacristina Rumi ◽  
Timothy J. White ◽  
Timothy J. Bunning ◽  
...  

It has previously been shown that for polymer-stabilized cholesteric liquid crystals (PSCLCs) with negative dielectric anisotropy, the position and bandwidth of the selective reflection notch can be controlled by a direct-current (DC) electric field. The field-induced deformation of the polymer network that stabilizes the devices is mediated by ionic charges trapped in or near the polymer. A unique and reversible electro-optic response is reported here for relatively thin films (≤5 μm). Increasing the DC field strength redshifts the reflection notch to longer wavelength until the reflection disappears at high DC fields. The extent of the tuning range is dependent on the cell thickness. The transition from the reflective to the clear state is due to the electrically controlled, chirped pitch across the small cell gap and not to the field-induced reorientation of the liquid crystal molecules themselves. The transition is reversible. By adjusting the DC field strength, various reflection wavelengths can be addressed from either a different reflective (colored) state at 0 V or a transparent state at a high DC field. Relatively fast responses (~50 ms rise times and ~200 ms fall times) are observed for these thin PSCLCs.


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