Optical Mode Characterization of the Configuration of a Thin Ferroelectric Liquid Crystal Cell Under an Applied Electric Field

Lavers, C. R.; Cann, P. S.; Sambles, J. R.; Raynes, E. P.

doi:10.1080/09500349114551621

Cited by 8 publications

(2 citation statements)

References 9 publications

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“…An available Helium Neon (He-Ne) laser operating at 632.8nm provided coupling to the FLC cell guided modes, stepped in angle under computer control, and is a key wavelength for consideration of dawn/dusk stealth platform operation, being scattered less by the atmosphere and battlefield obscurants under those conditions than other wavelengths. Other non-laser visible wavelengths were examined to determine SCE8 and other liquid crystal wavelength dispersive characteristics [18], as well as under an applied electric field [20]. A Frequency Modulated (FM) chopper permits signal and reference with Phase Sensitive Detection (PSD) using lock-in amplifiers to minimise noise (figure 6).…”

Section: Spr Experimental Arrangementmentioning

confidence: 99%

Theoretical Modelling of Liquid Crystal Electro-Optical Material Display Elements to Achieve Optimal Low Power Consumption Ship Stealth

Lavers¹

2020

RPM

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Advanced optical stealth techniques are of growing importance in the role of manned and unmanned aircraft or ship platforms. We consider here the concept of using passive reflective display elements rather than high power active light projection to achieve a low observable camouflaged ship platform. This paper presents practical consideration towards minimal radiated power user-driven requirements using adaptive liquid crystal electro-optical methods. Optical reflectivity for a multi-layer liquid crystal cell structure composed of a glass/ ITO/ aligning layer/ liquid crystal/ aligning layer/ ITO/ glass will support optical guided modes. Reflectivity as a function of angle and voltage are compared with theory generated from a Fresnel matrix formalism. Voltage device modulated reflectivities are then simulated across a ship platform to evaluate this method for low power consumption, with minimal radiated optical radiation.

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Section: Spr Experimental Arrangementmentioning

confidence: 99%

Theoretical Modelling of Liquid Crystal Electro-Optical Material Display Elements to Achieve Optimal Low Power Consumption Ship Stealth

Lavers¹

2020

RPM

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“…Experimental investigation techniques based on prism coupling can yield the accurate evaluation of the refractive index of planar waveguides. These techniques have also been used extensively for LC slabs [27]. However, it is difficult to apply such a technique in narrow channel waveguides.…”

Section: Introductionmentioning

confidence: 99%

Modelling, design and analysis of liquid crystal waveguides in preferentially etched silicon grooves

Bellini¹,

Beccherelli²

2009

J. Phys. D: Appl. Phys.

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This paper presents a fully consistent theoretical framework for liquid crystal (LC) channel waveguides that have been experimentally demonstrated in previous publications. We revise the optical design of the LC waveguides in silicon grooves and implement here a vectorial, fully consistent model of the LC waveguide electro-optical behaviour, based on the finite element method. The numerical investigation shows that LC waveguides demonstrate properties of propagation control and switching. They switch on and off with a low applied voltage. We discuss the major design parameters of the device and the effect of loss-inducing control electrodes.

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The theoretical design and fabrication of a prism-coupled polarization conversion ferroelectric liquid crystal light modulator

Lavers¹

1993

Thin Solid Films

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Optical Mode Characterization of the Configuration of a Thin Ferroelectric Liquid Crystal Cell Under an Applied Electric Field

Cited by 8 publications

References 9 publications

Theoretical Modelling of Liquid Crystal Electro-Optical Material Display Elements to Achieve Optimal Low Power Consumption Ship Stealth

Theoretical Modelling of Liquid Crystal Electro-Optical Material Display Elements to Achieve Optimal Low Power Consumption Ship Stealth

Modelling, design and analysis of liquid crystal waveguides in preferentially etched silicon grooves

The theoretical design and fabrication of a prism-coupled polarization conversion ferroelectric liquid crystal light modulator

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