Infrared detector has a wide range of applications. To fabricate an IR detector with good sensitivity, an efficient IR absorber is needed. In this paper, we theoretically and experimentally investigated the absorption characteristics of Ti, multi-layer structured Ti-SiO2 and TiNx-SiNx nano films. The multi-layer structured TiNx-SiNx films with different nitrogen contents and Ti nano films with ...

Solar energy presents the greatest potential by which to produce heat with reduced carbon emissions for power generation. To increase its harvesting and conversion, it is necessary understand fundamental concepts develop new materials. Although many processes can obtain selective absorbing surfaces (SAS) application in solar exploitation, including electroplating methods, those have not suffici...

Direct computer simulations of electromagnetic scattering by discrete random media have become an active area of research. In this progress review, we summarize and analyze our main results obtained by means of numerically exact computer solutions of the macroscopic Maxwell equations. We consider finite scattering volumes with size parameters in the range [20,60], composed of varying numbers of...

' Several perplexing questions involving standardization techniques surface when ultraviolet spectrophotometry is used for the determination of unknown ribonucleic acids isolated from tissue sources. One must consider the effect of hydrolysis on total absorbance, nucleotide makeup of a ribonucleic acid versus molar absorptivity and additivity of riucleotides on total measured absorbance. Experi...

Iron pyrite (cubic FeS2) is a promising candidate absorber material for earth-abundant thin-film solar cells. Here, we report on phase-pure, large-grain, and uniform polycrystalline pyrite films that are fabricated by solution-phase deposition of an iron(III) acetylacetonate molecular ink followed by sequential annealing in air, H2S, and sulfur gas at temperatures up to 550 °C. Phase and elemen...

Thin film membranes of space environmentally stable polymeric materials possessing low color/solar absorptivity (α) are of interest for potential applications on Gossamer spacecraft. In addition to these properties, sufficient electrical conductivity is required in order to dissipate electrostatic charge (ESC) build-up brought about by the charged orbital environment. One approach to achieve su...

Abstract. Metamaterials are artificially engineered materials that have properties not found in naturally occurring materials. They designed to specific electromagnetic or other physical properties, such as negative refraction, superconductivity high absorptivity. often composed of structures on a scale much smaller than the wavelength phenomena they intended manipulate. wide range potential ap...

solar flare events of high importance were utilised to study solar latitudinal frequency distribution of the solar flares in northern and southern hemisphere for the solar cycle 22 to recent solar cycle 23. a statistical analysis was performed to obtain their relationship with sudden storm commencement (sscs) and forbush decrease events (fd) of cosmic ray intensity. an 11-year cyclic variation ...