To fabricate high-quality polycrystalline VO₂ thin film with a metal-insulator transition (MIT) temperature less than 50 °C, high-power impulse magnetron sputtering with different discharge currents was employed in this study. The as-deposited VO₂ films were characterized by a four-point probe resistivity measurement system, visible-near infrared (IR) transmittance spectra, X-ray diffraction (X...

Utilization of hemicelluloses from biomass energy is an important approach to explore renewable resources. A convenient, quick, and inexpensive method for the preparation of blended films from quaternized hemicelluloses (QH) and carboxymethyl cellulose (CMC) was introduced into this study. QH and CMC solution were first mixed to form homogeneous suspension, and then were dried under vacuum to f...

A new approach for retrieval of the total atmospheric water vapor content (TAWV) based on the Moderate Resolution Imaging Spectrometer (MODIS) two thermal IR (TIR) channels (ch31 and ch32) is proposed. To developing the approach, the radiative transfer calculations are carried out using MODTRAN 4.0 combined with the latest global assimilated data, and the pixels contaminated by clouds are elimi...

Magneto-optical materials are the fundamental component of Faraday isolators; therefore, they significantly important for solid-state laser systems. Fluoride magneto-optical crystals such as CeF3, KTb3F10 and LiTbF4 exhibit advantages wide transmittance range, high optical homogeneity, smaller thermal lensing weaker induced depolarization effect, thus promising candidates isolators in high-powe...

Er(3+)-doped transparent glass ceramics containing micron-sized SrF2 crystals were obtained by direct liquid-phase sintering of a mixture of SrF2 powders and precursor glass powders at 820 °C for 15 min. The appearance and microstructural evolution of the SrF2 crystals in the resulting glass ceramics were investigated using X-ray diffraction, field-emission scanning electron microscopy and tran...

FTR spectroscopy has been used in reflection-absorption mode to monitor the adsorption of a-imethylgallium (TMGa) at GaAs (100) surfaces at 300 K. Intense, positive going transmittance bands are observed, which confirm the theoretical prediction that the presence of an adsorbate layer at a semiconducting substrate which itself does not absorb the IR radiation, will result in a net increase in a...

An analytic expression of transmittance based on the Airy wavefunctions approach has been derived for an electron through an anisotropic heterostructure with an applied voltage to the barrier of the heterostructure. The Si(110)|Si0.5Ge0.5|Si(110) heterostructure was used to examine the analytic expression. In order to evaluate the Airy wavefunctions approach, the transfer matrix method, which i...

Study of mid-infrared (mid-IR) nonlinear optical (NLO) materials is hindered by the competing requirements optimized second-harmonic generation (SHG) coefficient dij and laser-induced damage threshold (LIDT) as well harsh synthetic conditions. Herein, we report facile hydrothermal synthesis a polar NLO vanadate Cs4V8O22 (CVO) featuring quasi-rigid honeycomb-layered structure with [VO4] [VO5] po...

The organic salt of Diimidazolium dipicrate monohydrate (DIDPMH) has been synthesized and single crystals grown by slow solvent evaporation solution growth technique at room temperature using dry acetonitrile as the solvent. The H and C NMR spectra were recorded to confirm the presence of different proton environments and different kinds of carbon atoms respectively. The molecular structure of ...

We propose a spectral prediction model for predicting the reflectance and transmittance of recto-verso halftone prints. A recto-verso halftone print is modeled as a diffusing substrate surrounded by two inked interfaces in contact with air (or with another medium). The interaction of light with the print comprises three components: (a) the attenuation of the incident light penetrating the print...