Superior improvement in dynamic response of liquid crystal lens using organic and inorganic nanocomposite

Abstract

In this study, the response time of a 4 mm-aperture hole-patterned liquid crystal (HLC) lens has been significantly improved with doping of N-benzyl-2-methyl-4-nitroaniline (BNA) and rutile titanium dioxide nanoparticle (TiO2 NP) nanocomposite. The proposed HLC lens provides the focus and defocus times that are 8.5× and 14× faster than the pristine HLC lens, respectively. Meanwhile, the focus and defocus times of the proposed HLC lens reach the order of millisecond. Result shows that the synergistic effect of BNA and TiO2 NP induces a 78% decrement in the viscosity of pristine LC mixture that significantly shortens the focus and defocus times of HLC lens. The remarkable decrement in viscosity is mainly attributed to spontaneous polarization electric fields from the permanent dipole moments of the additives. Besides, the strengthened electric field surrounding TiO2 NP assists in decreasing the focus time of HLC lens. The focus and defocus times of HLC lens are related to the wavefront (or phase profile) bending speed. The time-dependent phase profiles of the HLC lenses with various viscosities are calculated. This result shows the decrease in wavefront bending time is not simply proportional to viscosity decrement. Furthermore, the proposed HLC lens emerges a larger tunable focus capability within smaller voltage interval than the pristine HLC lens.

Unveiling the role of electrode polarization in modulating dielectric and electro-optical properties of SnSe dispersed nematic liquid crystal

“…23 The integration of these materials has the potential to unlock new functionalities and enhance the performance of devices. [24][25][26] Furthermore, the inclusion of semiconductor NPs can introduce novel optical properties, including enhanced absorption or emission characteristics that can be used in displays, sensors, and photovoltaic devices. [27][28][29] Moreover, the anisotropic nature of the LCs allows for precise control over the alignment of the nanoparticles, leading to tunable optical properties based on their orientation.…”

Structural, electrical and optical studies on organic NLO single crystal of N‐benzyl‐2‐methyl‐4‐nitroaniline (BNA)

“…[12][13][14] The BNA crystals are a leading NLO material and potentially superior to currently available organic materials. [15,16] Here, BNA through slow evaporation method and investigated its functional groups, XRD, FIIR, TG/DSC, optical studies, NLO studies, and dielectric measurement of BNA crystal, and their results are discussed.…”

Inquisitive Optical and Electro-Optical Attributes of Azo-Dye Dispersed Nematic Liquid Crystal for Applications in Wavelength-Tunable Optical Filters

“…Although the primary concern has been on their use in display devices, dyes in LC hosts have been suggested as the basis for materials with an extensive range of applications, namely, advanced textiles, , augmented reality and virtual reality systems, , optical shutters, , biosensing, , LC lasers, LC lenses, , soft actuators, , smart windows, , and optical storage devices , but for the best of our knowledge, the optical tunability and energy storage applications of MR-doped LC systems have not been discussed thoroughly so far.…”