High contrast ratio of a vertically aligned liquid crystal cell using photocrosslinking alignment

Kim, Hyun-Wuk; Choi, Kyunghan; Kim, Jin-Yool; Kim, Tae-Min; Kim, Jong-Duk

doi:10.1080/02678290210138821

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…From a technological viewpoint, a precise and reliable control of the easy axis is indispensable. The selective pretilting remarkably reduces the apparent tilt angle, that is, the angle between the projections onto the substrate plate of the nematic layer normal and the director in the uniform states, which has a better effect on relaxation time, threshold voltage and the display contrast [23][24][25]. Indeed, in nematic LCDs, a slightly pretilted alignment plays an important role in eliminating orientational defects, which further helps us to improve the device quality.…”

Section: Effect Of Pretiltmentioning

confidence: 94%

Dielectric and visco-elastic properties of laterally fluorinated liquid crystal single compounds and their mixture

Dasgupta¹,

Das²,

Das

2012

Liquid Crystals

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Section: Effect Of Pretiltmentioning

confidence: 94%

Dielectric and visco-elastic properties of laterally fluorinated liquid crystal single compounds and their mixture

Dasgupta¹,

Das²,

Das

2012

Liquid Crystals

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Novel properties of high-performance multi-component mixture for Vertically Aligned mode LCDs

Dasgupta,

Mondal,

Das

et al. 2023

Liquid Crystals

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Fast-switching reconfigurable metadevice with metasurface-induced liquid crystal alignment for light modulator applications

Chang,

Pivnenko,

Singh

et al. 2024

Opt. Mater. Express

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Metasurface technology is progressing rapidly towards commercialization and productization, due to its unparallelled advantages over conventional optical solutions. The reconfigurable metasurface, exhibiting more flexibility and capacity than its static counterpart, has been one of the most pursued features of metasurface. In this work, we present liquid crystal-based dynamic metasurface by immersing metasurface in nematic liquid crystal environment. No alignment material was used, and liquid crystal was aligned directly by metasurface. The alignment quality was characterized and the intensity contrast of 33 was obtained. Optical amplitude modulation was achieved with the modulation depth of 91% at the wavelength of 1375 nm. Moreover, sub-micrometre cell gap of 875 nm was realized, and the response time was measured to be sub-millisecond at room temperature, translating to > 1KHz operation frequency. The higher operation frequency of > 3.4 KHz was recorded at elevated temperature. The key performance indicators demonstrated in this work showcase the promising future of liquid crystal – based reconfigurable metasurface, especially for fast light modulator applications.//Metasurface technology is progressing rapidly toward commercialization and productization due to its unparalleled advantages over conventional optical solutions. The reconfigurable metasurface, exhibiting more flexibility and capacity than its static counterpart, has been one of the most pursued features of the metasurface. In this work, we present a liquid crystal-based dynamic metasurface by immersing the metasurface in a nematic liquid crystal environment. No alignment material was used, and liquid crystal was aligned directly by metasurface. The alignment quality was characterized, and the intensity contrast of 33 was obtained. Optical amplitude modulation was achieved with a modulation depth of 91% at the wavelength of 1375 nm. Moreover, a sub-micrometer cell gap of 875 nm was realized, and the response time was measured to be sub-millisecond at room temperature, translating to > 1KHz operation frequency. The higher operation frequency of > 3.4 KHz was recorded at elevated temperatures. The key performance indicators demonstrated in this work showcase the promising future of liquid crystal-based reconfigurable metasurface, especially for fast light modulator applications.

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High contrast ratio of a vertically aligned liquid crystal cell using photocrosslinking alignment

Cited by 3 publications

References 16 publications

Dielectric and visco-elastic properties of laterally fluorinated liquid crystal single compounds and their mixture

Dielectric and visco-elastic properties of laterally fluorinated liquid crystal single compounds and their mixture

Novel properties of high-performance multi-component mixture for Vertically Aligned mode LCDs

Fast-switching reconfigurable metadevice with metasurface-induced liquid crystal alignment for light modulator applications

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