Fast switching near a smectic‐to‐nematic phase transition

Gauza, Sebastian; Parish, Amanda; Wu, Shin‐Tson; Spadło, A.; Dąbrowski, R.

doi:10.1080/02678290802120299

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Over the past few years, different isothiocyanato compounds were investigated, for example, by Catanescu and Chien 17 as well as by our group. [18][19][20][21][22][23][24] These studies led to the selection of the following, particularly promising compounds, see Figure 1.…”

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Highly birefringent, low-loss liquid crystals for terahertz applications

et al. 2013

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With growing interest in switchable devices for the THz frequency range, there is a strong demand for liquid crystals (LC) exhibiting both a high birefringence and a low absorption. We present the refractive index and absorption coefficient of the liquid crystal mixtures 1852 and 1825 in the frequency range between 0.2 and 2.5 THz. Both mixtures are designed specifically for high birefringence Δn of 0.32 and 0.38, respectively, in the THz region. In addition, they show low absorption coefficients for both ordinary and extraordinary polarization. This low absorbance in combination with the high birefringence makes these LCs particularly well suited for applications in switchable devices for THz optics

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Highly birefringent, low-loss liquid crystals for terahertz applications

et al. 2013

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“…Results are detailed in our earlier work. 22) Figures 1(a) and 1(b) show the measured visco-elastic coefficient data that exhibit the opposite trend. Here, it is obvious for the compounds with smectic phase (1b and 1c) that visco-elastic coefficient values resulting from relaxation time measurement do not follow theoretical prediction at the temperatures near the S-N transition.…”

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confidence: 98%

“…All homologues are listed in Table I with detailed structures and phase transition temperatures included. 22,25,26) Isothiocyanato tolane compounds (Structure IV) are included as a dilutant component in our experiment.…”

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confidence: 99%

“…14) It is difficult to suppress the smectic phase without sacrificing the mixture's electro-optical performance, therefore, we investigated this intrinsic smectic-to-nematic (S-N) phase transition phenomenon of some single LC compounds. 22) In this paper, we present some high Án LC mixtures exhibiting unusual boost of figure-of-merit (FoM) while operated at a temperature near the S-N transition. Measured visco-elastic coefficient was significantly reduced near the S-N transition temperature.…”

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confidence: 99%

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Fast Switching in the Vicinity of Smectic-to-Nematic Phase Transition in High Birefringence Isothiocyanate Mixtures

Gauza¹,

Parish²,

Wu³

et al. 2009

Jpn. J. Appl. Phys.

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Two series of high birefringence liquid crystal compounds, isothiocyanato phenyl-tolane and terphenyl, and mixtures were prepared and their physical properties evaluated. Depending on the terminal alkyl chain length, different mesomorphic sequences were observed. In the vicinity of nematic-to-smectic transition, the visco-elastic coefficient decreases, instead of increase, as the temperature decreases. We investigated the possibility of extending the observed phenomenon from single compounds to mixtures for practical applications. This behavior is useful for improving the response time of a liquid crystal device, if the operating temperature can be accurately controlled.

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Existence of time lag in crystalline to smectic A (K–SmA) phase transition of 4-decyl-4-biphenylcarbonitrile (10CB) liquid crystal

McDonough

Sharma

2014

J Therm Anal Calorim

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Fast switching near a smectic‐to‐nematic phase transition

Cited by 5 publications

References 27 publications

Highly birefringent, low-loss liquid crystals for terahertz applications

Highly birefringent, low-loss liquid crystals for terahertz applications

Fast Switching in the Vicinity of Smectic-to-Nematic Phase Transition in High Birefringence Isothiocyanate Mixtures

Existence of time lag in crystalline to smectic A (K–SmA) phase transition of 4-decyl-4-biphenylcarbonitrile (10CB) liquid crystal

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