Bragg Reflection Properties of Electrically Controlled Helix Distortion in Cholesteric Liquid Crystals

Zhixin, 范志新 Fan; Tianchi, 于天池 Yu; Huan, 黄欢 Huang; Heng, 张恒 Zhang; Yonghan, 吴永晗 Wu

doi:10.3788/aos20082804.0744

Cited by 3 publications

(3 citation statements)

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“…However, the multi‐exposure in fabrication is difficult to realize in production process. To simplify the fabrication process, an alternate LC (ALC) mask is proposed with the alternate arrangement of twist‐nematic (TN) LC and nematic LC to prepare microdomain twisted structure devices 10,11 . The fabrication process is optimized to two steps exposure with the usage of ALC and is suitable for large‐amount‐production.…”

Section: Introductionmentioning

confidence: 99%

Polarization‐independent liquid crystal device with microdomain twisted structure

Tang,

Huang,

Zhang

et al. 2024

J Soc Info Display

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The polarization‐independent liquid crystal (LC) phase modulators can greatly improve the efficiency and reduce the complexity of the optical system. However, it is difficult for the LC phase modulator to achieve both good low‐loss modulation and polarization‐independent properties. A LC phase modulator of single layer microdomain twisted structure has been proposed to achieve good polarization independence and low loss in phase modulation. However, the multi‐exposure in fabrication is difficult to realize in production process. To simplify the fabrication process, an alternate LC (ALC) mask is proposed with the alternate arrangement of twist‐nematic (TN) LC and nematic LC. The fabrication process is optimized to two steps exposure with the usage of ALC and is suitable for large‐amount‐production. The measurement results showed that the single layer microdomain twisted LC phase modulator may get very low polarization dependence, about 3.52% under 2π phase modulation depth, with low loss. The device shows good potential application in optical communication, wearable device, and display.

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Section: Introductionmentioning

confidence: 99%

Polarization‐independent liquid crystal device with microdomain twisted structure

Tang,

Huang,

Zhang

et al. 2024

J Soc Info Display

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“…The light can be modulated with low loss by the twisted structure has good lowloss modulation property, meanwhile the orthogonal microdomains shows good polarization-independence. And we propose to use the light-controlled azimuth angle (LCAA) method based on the rotation effect of cholesteric liquid crystal (CLC) to combine the advantages of those two structures to prepare MMOT structure devices 9,10 , which has both a good low-loss modulation and polarization-independent properties.…”

Section: Introductionmentioning

confidence: 99%

P‐189: Distinguished Poster: Polarization Independent Liquid Crystal Device with Multi‐Microdomain Twist Structure

Tang,

Huang,

Zhang

et al. 2024

Symp Digest of Tech Papers

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The polarization‐independent liquid crystal (LC) phase modulators can greatly improve the efficiency and reduce the complexity of the optical system. However, it is difficult for the LC phase modulator to achieve both good low‐loss modulation and polarization‐independent properties. A LC phase modulator of single layer multi‐microdomain orthogonal twisted (MMOT) structure is proposed which may achieve good polarization independence and low loss in different phase depth. A lightcontrolled azimuth angle (LCAA) process based on the rotation effect of cholesteric liquid crystal (CLC) is developed for the fabrication of the single layer MMOT structure. The measurement results showed that the single layer MMOT LC phase modulator may get very low polarization dependence, about 3.52% under 2Ï€ phase modulation depth, with low loss. The device shows good potential application in optical communication, wearable device, and display.

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“…The most important parameters of the polymer-dispersed liquid crystal devices are their working voltages and viewing angles [6][7][8][9][10][11][12][13]. Therefore, it is important to set up a device in laboratory to measure the working voltages and viewing angles for the polymer-dispersed liquid crystal devices.…”

Section: Introductionmentioning

confidence: 99%

Viewing Angle Measurement of Polymer-Dispersed Liquid Crystal

Jiang

2011

SSP

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Polymer-dispersed liquid crystals are one kind of important devices. With a He-Ne laser and a photoelectric detector, we measured the driving-voltage dependent and viewing-angle dependent transmission for a polymer-dispersed liquid crystal device. Our results showed that the polymer-dispersed liquid crystal device worked at the driving voltage of 4 V and the effective viewing angle of about 65 degree.

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Bragg Reflection Properties of Electrically Controlled Helix Distortion in Cholesteric Liquid Crystals

Cited by 3 publications

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Polarization‐independent liquid crystal device with microdomain twisted structure

Polarization‐independent liquid crystal device with microdomain twisted structure

P‐189: Distinguished Poster: Polarization Independent Liquid Crystal Device with Multi‐Microdomain Twist Structure

Viewing Angle Measurement of Polymer-Dispersed Liquid Crystal

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