Cell Gap Effect on the Dynamics of Liquid Crystal Phase Modulators

Abstract

This paper provides a complete physical picture of optical response time as a function of cell gap (d) in a wide voltage regime. Normally both rise and decay times are known to be proportional to d 2 in the small angle approximation (V th < V < ffiffiffi 2 p V th ), and in the high voltage regime where V p < V < V i the optical decay time is independent of d. In this paper, we found that between these two extremes there is a region where the response time is linearly proportional to d. Our analytical derivation is confirmed by experimental results.

Greenly synthesized porous carbon nanoparticle (bio‐waste‐based)‐doped nematic liquid crystal composite with optimized electric and electro‐optical properties for devices

“…LCs exhibiting fast response time have come up as a remedy for the motion blur in moving pictures and can also counteract the cross-talk in three-dimensional (3D) displays. [34][35][36][37] Viscosity modulation, 38 variation in anchoring energy, 39 reshaping the electrode and altering the driving scheme, 40 changing the cell gap, 41 redesigning the guest-host materials, 42 and new switching modes 43 are few of the proposed methods to cure this problem. Enhanced electro-optical properties of LCs facilitated by the dispersion of different guest entities have been reported by several researchers.…”

Nematic Liquid Crystals Dispersed with Thermoelectric Gallium Oxide (Ga2O3) Microrods: A Perspective for Improving the Response Time of Electro-Optical Devices

“…Nematic liquid crystals (NLCs) are optically uniaxial materials reaching an electro-optical response of ∼1 ms. NLCs have been extensively utilized in a variety of applications due to their superior electro-optical characteristics, including optical nonlinearity, optical phase modulators, microdisplays, flat-panel displays, optical antennas, and optical switching devices. − Liquid crystals (LCs) with excellent response time are essential for removing the motion blur effect in dynamic pictures and curing cross-talk in three-dimensional (3D) displays. − The reaction time of LCs should be less than 3 ms to reduce motion blurs and cross-talks. To resolve this concern, many solutions have been suggested, including adjusting the viscosity of the materials, modifying the anchoring energy, modifying the electrode design and driving technique, modifying the cell spacing, finding suitable guest–host systems, and introducing new switching mechanisms …”

“…To resolve this concern, many solutions have been suggested, including adjusting the viscosity of the materials, 10 modifying the anchoring energy, 11 modifying the electrode design and driving technique, 12 modifying the cell spacing, 13 finding suitable guest−host systems, 14 and introducing new switching mechanisms. 15 The advancement in technology requires the synthesis of novel materials with precisely defined qualities. As a result, new materials are created and extensively tested for their possible applications.…”

LCoS SLM Study and Its Application in Wavelength Selective Switch

“…Table 1 in the following provides the pros and cons for each Electro-Optic LC structure, from which we see that the zero-twisted ECB mode is advantageous over other solutions in the phase only application. Low light usage efficiency [38]; Large quantization noise [39] With zero-twisted ECB LCoS, the response time is then mainly dependent on the thickness of the display [40], with an inversely quadratic dependence between the two parameters. For an equal optical path length, typically the thickness for a reflective display is half of that of a transmissive one.…”