Holographically Formed, Acoustically Switchable Gratings Based on Polymer-Dispersed Liquid Crystals

Liu, Yan Jun; Lu, Mengqian; Ding, Xiaoyun; Leong, Eng Choon; Lin, Szu-Yuan; Shi, Jinjie; Teng, Jinghua; Wang, Lin; Bunning, Timothy J.; Huang, Tony Jun

doi:10.1177/2211068212455632

Cited by 13 publications

(6 citation statements)

References 40 publications

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“…Recently, a similar effect has been shown when using polymer dispersed liquid crystals (PDLCs) [7,8]. Surface acoustic waves were propagated along a sample, and were shown to produce acoustic clearing in a PDLC layer.…”

Section: Polymer Dispersed Liquid Crystalsmentioning

confidence: 65%

Ultrasound visualization using polymer dispersed liquid crystal sensors

Edwards¹,

Trushkevych²,

Eriksson³

et al. 2017

AIP Conference Proceedings

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Section: Polymer Dispersed Liquid Crystalsmentioning

confidence: 65%

Ultrasound visualization using polymer dispersed liquid crystal sensors

Edwards¹,

Trushkevych²,

Eriksson³

et al. 2017

AIP Conference Proceedings

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“…The mechanism of interaction of ultrasound with PDLCs is less clear. Several researchers have reported that ultrasound will clear PDLC films, with clearing of the whole film due to leaky wavemodes from a surface acoustic wave reported in 14,15 . We have recently shown visualisation of acoustic fields using PDLC films, demonstrated by the clearing of a film on top of an aircoupled ultrasound transducer, with the cleared regions matching the regions of largest amplitude vibration during resonance for frequencies below 1 MHz.…”

Section: Department Of Physics University Of Warwick Coventry Cv4 mentioning

confidence: 99%

The interaction of polymer dispersed liquid crystal sensors with ultrasound

Edwards

Ward

Zhou

et al. 2020

Applied Physics Letters

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Polymer dispersed liquid crystals (PDLCs) have been shown to be sensitive to ultrasound through the acousto-optic effect. The acousto-optic response of PDLCs was studied over a broad frequency range (0.3–10 MHz). We demonstrate that the displacements required to produce acousto-optic clearing of PDLC films can be as low as a few nanometers, which is at least 103 times smaller than the PDLC droplet size, is 105 times smaller than the PDLC layer thickness, and of the order of the molecular size of the liquid crystal constituents. This suggests that the acousto-optic effect in PDLCs is due to the microscopic effects of the LC reorientation under torques or flows rather than the LC reorientation through macroscopic droplet deformation. The displacement required for clearing is related to the frequency of operation via an exponential decay. We attribute the observed frequency response to a freezing out of the rotational motion around the short axis of the liquid crystal. The reported frequency dependence and displacements required indicate that the effects and materials described here could be used for ultrasound visualization in a non-destructive testing context.

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“…ДЭ голографических решеток может управляться так-же ультразвуковым излучением [169]. С увеличением ин-тенсивности ультразвука величина ДЭ голограмм падает вследствие перестройки ЖК молекул.…”

Section: светочувствительные жк полимерные системыunclassified

Современное Состояние Разработки Светочувствительных Сред Для Голографии (Обзор)

Барачевский¹

2018

Журнал Технической Физики

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Holographically Formed, Acoustically Switchable Gratings Based on Polymer-Dispersed Liquid Crystals

Cited by 13 publications

References 40 publications

Ultrasound visualization using polymer dispersed liquid crystal sensors

Ultrasound visualization using polymer dispersed liquid crystal sensors

The interaction of polymer dispersed liquid crystal sensors with ultrasound

Современное Состояние Разработки Светочувствительных Сред Для Голографии (Обзор)

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