A5064754310- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Liquid Crystal Research Advancements
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- advanced mathematical theories
- Neutrino Physics Research
- Advanced Materials and Mechanics
- Photonic Crystals and Applications
- Plant Reproductive Biology
- Black Holes and Theoretical Physics
- Orbital Angular Momentum in Optics
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Advanced Data Storage Technologies
- Muon and positron interactions and applications
- Diamond and Carbon-based Materials Research
- Nonlinear Dynamics and Pattern Formation
- Anodic Oxide Films and Nanostructures
- Advanced Optical Imaging Technologies
- Atmospheric chemistry and aerosols
National Yang Ming Chiao Tung University
2019-2024
AU Optronics (Taiwan)
2016-2017
University of Bonn
2010-2015
The University of Adelaide
2013
National Tsing Hua University
2005
CVD diamond is an attractive material option for LHC vertex detectors because of its strong radiation-hardness causal to large band gap and lattice. In particular, pixel operating close the interaction point profit from tiny leakage currents small capacitances resulting in low noise figures when compared silicon. On other hand, charge signal traversing high energy particles smaller than silicon by a factor about 2.2. Therefore, quantitative determination signal-to-noise ratio (S/N)...
This work investigates the unimolecular dissociation of methoxycarbonyl, CH3OCO, radical. Photolysis methyl chloroformate at 193 nm produces nascent CH3OCO radicals with a distribution internal energies, determined by velocities momentum-matched Cl atoms, that spans theoretically predicted barriers to CH3O + CO and CH3 CO2 product channels. Both electronic ground- excited-state undergo competitive both The experimental branching from ground-state radical, about 70%, is orders magnitude...
Orientation of nematic liquid crystal (NLC) around a topological defect is expressed by the equation, ψ=sϕ+ϕ0, where ψ, s, ϕ and ϕ0 are director spatial phase, charge, azimuthal angle phase shift, respectively. Conventionally, array modelled simply adding ψ fields all defects. The resultant combination defects imposed design (ψs) due to lattice geometry (ψg). However, arrays generated in homeotropic confinement show hyperbolic hedgehogs (ψh) between ψss, which out scope conventional model....
Creation of a topological defect array in liquid crystals has been notable focus recent years, because the can be utilized as precision optics, templates self-assembled microstructures, and elastomer actuators. So far, arrays are created intuitively by trial error. Systematic rules to arrange defects into stable long-ranged demand. A model two-dimensional square hexagonal was developed based on previous experimental results. The is generalized for quasicrystals this research. crystal...
Vertical alignment (VA) is a widely applied operation mode for liquid crystal displays. To achieve optimum brightness, the electrode of VA often patterned with fish-bone fine slits to generate fringe field, so negative aligns along when electric field applied. usually simply modelled by bend geometry cell gap. However, defects, domain boundaries and periodical splay induced also exist in real pixels disturb alignment. Polymer-stabilised test cells various slit pitches which lead strength...
Interdigital electrodes are implemented in many commercial and novel liquid crystal devices to align molecules. Although empirical principles patents apply electrode design, only a few numerical simulations of alignment have been conducted. Why how the molecules an ordered manner has never adequately explained. Hence, this investigation addresses Fréedericksz transition vertically aligned that is driven by fishbone electrodes, thereafter identifies mechanism alignment. Theoretical...
The process of liquid crystal alignment in Polymer Stabilized Alignment Mode (PSA) is demonstrated this work. splay and bend deformation PSA was analyzed, the principle to control sequence discovered.
Abstract Laser‐Induced Periodic Surface Structure (LIPSS) combined with a layer of liquid crystal (LC) shows electronically selective color in this research. LC spontaneously aligns parallel to the LIPSS nano grooves. An in‐plane switching (IPS) cell LIPSS‐processed indium tin oxide (ITO) electrodes is fabricated, and compared traditional IPS rubbed aligning polymer. At fist place, an providing tunable gray scale expected. Surprisingly, brilliant glowing colors, which changes dramatically...
A large two-dimensional (2D) topological defect array in nematic liquid crystal (NLC) shows a translucent watery hazy texture. The haze is composition of three optical phenomena: scattering light, lens imaging and diffraction. light causes the milky haze. Vertically aligned NLC cells with pixel electrodes were fabricated to produce crowded irregular defects. key parameters are electrode shape (pad or annulus), structure (square hexagonal) size (from 15μm×15μm 200μm×200μm). Location charge...
Topological defect arrays in liquid crystal is an emerging optical material for smart windows, displays, gratings, and vortex generators. Formation of investigated using vertically aligned nematic cells with pad, crossed-strips, porous electrodes. The location types the defects are identified a polarized microscope. pads crossed-strips generate alternative radial hyperbolic defects. Unexpectedly, holes create dipoles defects, align parallel order. best dense packing achieved 15 μm × unit cell.
Topological defects arise when the symmetry of order in liquid crystal is broken during phase transitions or under specified boundary conditions. Fascinating applications, such as, optical vortex and memories, will be realized only if type position can precisely controlled. were generated nematic cell with homeotropic surface alignment voltage applied. The placed on designed positions using electric field. topological charge shape defect assigned by delicately pattern pixelated electrodes....
Generation of topological defect that has a particular type (topological charge) and specific shape (radial, spiral, or circular) on designed position is crucial step in producing q plates defect-mediated self-assembled micro structures. Shaping positioning defects can be achieved by applying delicately electric field nematic liquid crystal (NLC). The guidelines for the electrode design are provided this paper. following three frequently asked questions: 1) What kinds exist NLC? Points,...
Stable array of point defects was generated in nematic liquid crystal. Point with topological charge +1 and -1 (hedgehogs) were vertically aligned crystal cell. The hedgehogs arranged square or hexagonal arrays, the shape defect, such as radial circular hedgehogs, under control delicately patterned electrodes. Base on two-dimensional defect discovered experiments, three-dimensional crystals postulated. flux director field summarized for each unit analysis showed that structure is periodic...