Time evolution of diffusion fringes in the Christiansen effect

Mahanta, R.; Konwar, Mitali; Siam, Chandan; Baruah, G. D.

doi:10.1016/j.ijleo.2007.08.012

Optik

2009

DOI: 10.1016/j.ijleo.2007.08.012

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Time evolution of diffusion fringes in the Christiansen effect

R. Mahanta

Mitali Konwar

Chandan Siam

et al.

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2011

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“…An increase in particle size leads to a decrease in the intensity and narrowing of the band for the same sample weight. All the indicated characteristics are consistent with the appearance of the Christiansen effect in a solid particles -liquid system [5]. When the frequency is switched to 1 MHz, the position of the transmission band also changes to 3638 cm -1 .…”

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Selective modulation of infrared radiation by an Al2O3 particles — liquid crystal system

et al. 2011

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H22). We have measured the frequency dependences of the longitudinal and transverse components of the dielectric constant of the mixture and we have determined the frequency regions of positive and negative dielectric anisotropy. We show that for certain changes in the frequency of the applied electric field while the magnitude of the field remains the same, the transmission region of the Al 2 O 3 particles -dual-frequency liquid crystal system switches from one wavelength to the other. The experimental results are explained by the optical homogeneity of the system in a narrow wavelength interval when the refractive indices of the particle material and the matrix are close, and also by reorientation of the liquid crystal molecules as the frequency of the applied voltage changes.

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Selective modulation of infrared radiation by an Al2O3 particles — liquid crystal system

et al. 2011

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Time evolution of diffusion fringes in the Christiansen effect

Cited by 1 publication

References 16 publications

Selective modulation of infrared radiation by an Al2O3 particles — liquid crystal system

Selective modulation of infrared radiation by an Al2O3 particles — liquid crystal system

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