A5090956761- Liquid Crystal Research Advancements
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Phase-change materials and chalcogenides
- Advanced Fiber Laser Technologies
- Material Dynamics and Properties
- Semiconductor Lasers and Optical Devices
University of Leeds
2024
University of Hyderabad
2017-2019
We report magnetic field tuning of the structure and Whispering Gallery Mode lasing from ferromagnetic nematic liquid crystal micro-droplets. Microlasers were prepared by dispersing a crystal, containing nanoparticles fluorescent dye, in glycerol-lecithin matrix. The droplets exhibit radial director structure, which shows elastic distortion at very low external field. dye doped show lasing, is tunable WGM modes linear with wavelength-shift order 1 nm/100 mT. Depending on geometry, WGMs are...
Liquid crystal (LC) based tuneable optical microresonators are potential for being used as crucial components in photonic devices. In this article, we report experimental studies on LC micro-droplets dispersed several dispersing media. We find that the size of formed a low refractive index and optically transparent perfluoropolymer most stable with time than commonly Using negative dielectric anisotropy nematic liquid crystal, show whispering gallery mode resonance properties such quality...
We experimentally study the effect of temperature and electric field on quality (Q) factor free spectral range (FSR) whispering-gallery-mode optical resonance dye-doped nematic liquid crystal microdroplets. Both Q FSR are highly sensitive to tunable. The decreases, whereas increases substantially, with increasing field. variation is understood based change in effective refractive index dynamic size
Liquid crystal microdroplets have received considerable attention over recent years owing to their potential applications in chemical, biomedical sensing and lasing. We report experimental studies on whispering gallery mode lasing from dye-doped ferroelectric liquid suspended a low refractive index highly transparent perfluoropolymer at ambient temperature. show that the threshold pump energy of is much lower than nematic cholesteric microdroplets. With increasing electric field, linewidth...
In recent years, investigation on the non-display applications of liquid crystals has increased considerably. One emerging is whispering gallery mode (WGM) lasing. Here, we report experimental studies morphology and WGM lasing in nematic (N), smectic-A (SmA) smectic-C (SmC) microdroplets dispersed a highly transparent low refractive index perfluopolymer. The mesomorphic microdroplets, obtained by varying temperature, exhibit radial director configuration. SmA are found to be stable robust...
The synthesis of ferroelectric nematic liquid crystals (FNLCs) concludes the long wait for their existence and potential usage in multiple crystal based applications. In FNLCs, electric polarization phase significantly decreases switching time in-on display pixels. this article, we report occurrence translation symmetry breaking heat propagation along director field n[over ̂] phase. Due to C_{∞V} such a close similarity bent-core polar phase, rank-3 tensor describes its scalar order...