High Contrast Light Modulator Based on PDNLC Monolayer

Zyryanov, V. Ya.; Presnyakov, V. V.; Serebrennikov, A. N.; Shabanov, A. V.; Loiko, Valery A.; Konkolovich, A. V.

doi:10.1080/10587250108029949

Cited by 2 publications

(5 citation statements)

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“…Upon the analysis of the electro-optical characteristics of PDNLC films under study and data from previous measurements, [6][7][8][9][10][11][12] we present typical transmittance-voltage curves (see Fig. 3) which are characteristic of the various parameters of the composite structure.…”

Section: Variety Of Forms Of Transmittance-voltage Curves For Pdnlc Fmentioning

confidence: 99%

“…Because it is necessary to use linearly polarized monochromatic light passing through uniaxially oriented PDLC film with a relative area of the film occupied by LC droplets is about 0.7. 10,11 The last parameter depends on the form of the LC droplets.…”

Section: Variety Of Forms Of Transmittance-voltage Curves For Pdnlc Fmentioning

confidence: 99%

“…The heterogeneous structure of the PDLC films determines some specific features in their optical characteristics, and the interference effect is one of them. [6][7][8][9][10][11] The effect is caused by the interference of two light waves passing through the LC droplets and the polymer matrix between the droplets (see Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…By varying the relative area of the film occupied by LC droplets, it is possible to match the intensities of the two light beams and realize interference quenching of the monochromatic coherent radiation passing straight through the sample. 10,11 PDLC films are commonly prepared with a multilayer droplet arrangement to reach a low transmittance in the offstate, and hence a high contrast due to the multiple scattering of light. Such films have a thickness of 20-30 µm and a sufficiently high control voltage.…”

Section: Introductionmentioning

confidence: 99%

“…Interference quenching of light opens the way to developing thinner PDLC monolayers with high contrast and low-voltage control. 11 In this paper, we describe typical forms of transmittance-voltage curves with interference oscillations which characterize various structures of composite films and show how they reveal in the dynamics of the electro-optical response.…”

Section: Introductionmentioning

confidence: 99%

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Interference and ion effects in the electro‐optical response of PDNLC films

et al. 2005

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Abstract— We have considered the interference in polymer‐dispersed nematic liquid‐crystal (PDNLC) films caused by the superposition of light beams that pass through and between the LC droplets. The relative phase retardation of the beams depends on the applied voltage, and, as a consequence, interference oscillations can occur at transmittance‐voltage curves. Typical forms of the curves for composite films with various structures are presented. Interference oscillations were revealed not only in the static electro‐optical characteristics but in the dynamic ones also. For PDLC films based on commercially available components produced without thorough purification, the combination of interference and ionic effects is observed in the dynamics of the optical response. The relaxation of transmittance due to the depolarization ionic field is presented, depending on droplet size, temperature, pulse duration, and the concentration of the ionic admixture.

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