نتایج جستجو برای: effective refractive index

تعداد نتایج: 1060496  

Journal: :Optics express 2012
Hongwen Ren Su Xu Shin-Tson Wu

A simple approach for preparing gradient polymer network liquid crystal (PNLC) with a large refractive index change is demonstrated. To control the effective refractive index at a given cell position, we applied a voltage to a homogeneous cell containing LC/diacrylate monomer mixture to generate the desired tilt angle and then stabilize the LC orientation with UV-induced polymer network. By var...

Journal: :physical chemistry research 0
seyed ahmad razavizadeh department of chemistry, payame noor university, p. o. box: 19395-3697, iran setareh sheikh department of chemistry, shiraz branch, islamic azad university zeinab nassaj gerowgi department of chemistry, payame noor university

density, viscosity and refractive index of pure, binary and ternary mixtures of diethanolamine (dea) and methyl diethanolamine (mdea) with water have been measured at different temperatures from 288.15 k to 323.15 k at atmospheric pressure. also, this study presents the effects of mixture composition and temperature upon these thermo- physical properties. to measure the density and refractive i...

Journal: :physical chemistry research 2016
mohsen oftadeh mahboobeh moshfegh hassan hadi abdallah

polythiophenes are of considerable interest as synthetic metals. the optical properties of polythiophenes can be easily affected by alkyl chain or other side groups to the thiophene ring. the effect of polymerization degree on the energy gap was studied in the case of polythiophene as a conjugated polymer at b3lyp/6-31+g(3d,3p) level of theory. up to n = 16 could be confident that this degree o...

2003
Horng-Shyang Chen Shun-Lee Liu C. C. Yang Yean-Woei Kiang

We report the reduced waveguiding efficiency for the signals around 1560 nm as the injection current of an GaAs/ AlGaAs multiple quantum well laser diode (lasing wavelength at 840 nm) with a ridge-loading waveguide configuration increased. This reduction trend stopped when the injection current reached the threshold condition of the laser diode. The decreased waveguide transmission and the more...

Journal: :Optics express 2012
Kristopher J Rowland V Shahraam Afshar Alexander Stolyarov Yoel Fink Tanya M Monro

The spectral properties of light confined to low-index media by binary layered structures is discussed. A novel phase-based model with a simple analytical form is derived for the approximation of the center of arbitrary bandgaps of binary layered structures operating at arbitrary effective indices. An analytical approximation to the sensitivity of the bandgap center to changes in the core refra...

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