A rigorous analysis is presented of the diffraction efficiency of a polarization-insensitive surface-stabilized ferroelectric liquid-crystal (SSFLC) phase grating, taking full account of the internal structure of the ferroelectric liquid-crystal layer. When no field is applied, the twisted director profile in the relaxed state gives an optimum diffraction efficiency for a device thickness betwe...

Electrically controlled wavelength switchable terahertz band pass filter based on photonic crystal structures with LC defect layer is proposed and discussed. The wavelength switching can be realized by reorienting liquid crystal molecules through adjusting the applied electric field. Numerical analyses results have shown that the proposed structure has the potential to realize electrically cont...

We report a low-voltage and fast-response polymer network liquid crystal (PNLC) infrared phase modulator. To optimize device performance, we propose a physical model to understand the curing temperature effect on average domain size. Good agreement between model and experiment is obtained. By optimizing the UV curing temperature and employing a large dielectric anisotropy LC host, we have lower...

This paper reports the results of the parallelization of the 3D liquid crystal display (LCD) device simula-tor, which was run on the Cenju-3 parallel computer. The purpose of the simulator is to aid LCD designers in improving an d optimizing design parameters such as the structure of the electrodes and the material of liquid crystal. The speedup brought about by parallelization is of great impo...

We have previously reported on a maskless photolithography device for surface micropatterning and microfabrication by modifying a commercially available liquid crystal display projector. For the prototype, 10-microm resolution was achieved by downsizing the image on a 0.7-in. liquid crystal display panel to an area of 8 x 6 mm and projecting it on a fixed stage. Here, we report on a second-gene...

Multiwall carbon nanotubes (MWCNTs) are normally grown as tangled masses by laser ablation or arc discharge. However, using plasma enhanced chemical vapor deposition (PECVD) techniques it is possible to grow dense aligned mats of “grass-like” MWCNTs as well as individual nanotubes in sparse arrays through the use of e-beam patterning of the catalyst. The fact that they exhibit very high conduct...

Cell gap thickness is one of the most important design parameters for liquid crystal displays ~LCD!. Existing measurement methods only apply to transmittive LC cells. These methods are obviously unsuitable for measuring the cell gaps of reflective LCDs with internal reflectors. This kind of LCD includes single polarizer reflective displays and liquid crystal on silicon displays. The objective o...

We study optical properties of bistable reflective and transflective direct view ferroelectric liquid crystal displays (FLCDs). Single and double polarizer FLCDs with and without a retardation film are considered. Maximal contrast ratio versus optical retardation of liquid crystal layer for different configurations of FLCDs is calculated. Advantages and disadvantages of each configuration are d...

We propose a memorable and electrically tunable photonic device by infiltrating a dual-mode chiral-doped dual-frequency liquid crystal (LC) as the central defect layer in a one-dimensional photonic crystal (PC). According to the transmission properties of this structure, the wavelength tunability of defect modes is obtained by manipulating the LC layer in the dynamic mode due to the electricall...

Temperature-responsive luminescent solar concentrators (LSCs) have been fabricated in which the Förster resonance energy transfer (FRET) between a donor-acceptor pair in a liquid crystalline solvent can be tuned. At room temperatures, the perylene bisimide (PBI) acceptor is aggregated and FRET is inactive; while after heating to a temperature above the isotropic phase of the liquid crystal solv...