Optical absorption

Metal chalcohalides are promising candidates for next-generation technologies that include energy conversion, information storage, and quantum computing. Among them, antimony selenoiodide (SbSeI) has received rising interest for different optoelectronic devices, including photovoltaics, due to its bandgap energy, strong optical absorption, stability, and earth abundant, low-cost, and low toxicity constituents.

9p visergeyne 18-06-2024 2 0   Download

Based on the quantum kinetic equation for electrons, we theoretically studied the Quantum Multi-photon Nonlinear Absorption of a Strong Electromagnetic Wave (EMW) in twodimensional graphene with electron-optical phonon scattering mechanism.

9p viambani 18-06-2024 2 1   Download

Part 1 book "Introductory quantum optics" includes contents: Introduction, field quantization, coherent states, emission and absorption of radiation by atoms, quantum coherence functions, beam splitters and interferometers.

165p dianmotminh01 17-05-2024 4 2   Download

The objective of this study is to use theoretical calculations to clarify the nature of the interactions between the metal atoms and g-C3N4, thereby explaining their influence on the electronic and optical properties of the material with an emphasis on elucidating the optical absorption mechanism and the photogenerated electron-hole separation.

8p dianmotminh02 03-05-2024 5 1   Download

Ebook "Russian contributions to analytical chemistry" offers a unique perspective and novel information on the significant contributions of Russian scientists to analytical chemistry and chemical analysis. Written by the Editor-in-Chief of the Journal of Analytical Chemistry, it discusses various examples of new methods and approaches originating in Russia, such as chromatography, electrothermal atomic absorption spectrometry, Kumakhov X-ray optics, the Spolský effect in fluorescent analysis and important innovations in mass spectrometry, which are already widely used.

165p tracanhphuonghoa1007 22-04-2024 6 3   Download

Ebook "Energy-dispersive X-ray analysis in the electron microscope" provides an in-depth description of x-ray microanalysis in the electron microscope. It is sufficiently detailed to ensure that novices will understand the nuances of high-quality EDX analysis. Includes information about hardware design as well as the physics of x-ray generation, absorption and detection, and most post-detection data processing. Details on electron optics and electron probe formation allow the novice to make sensible adjustments to the electron microscope in order to set up a system which optimises analysis.

163p coduathanh1122 27-03-2024 3 1   Download

Ebook "Optical spectra of phthalocyanines and related compounds: A guide for beginners" displays how optical (absorption, emission, and magnetic circular dichroism) spectra of phthalocyanines and related macrocyclic dyes can be varied from their prototypical ones depending on conditions. As these compounds can be involved in colorful chemistry (which might be driven by impurities in solvents), their spectra behave like the sea-god Proteus in their mutability.

141p nhanphanguyet 28-01-2024 2 2   Download

Part 1 book "Handbook of low-level laser therapy" includes content: What is low-level laser (light) therapy; history of low level laser (light) therapy; is coherence important in photobiomodulation, tissue optics; light–tissue interaction and light dosimetry; mitochondrial light absorption and its effect on ATP production, role of reactive oxygen species in low-level laser therapy,... and other contents.

328p muasambanhan02 25-12-2023 4 2   Download

In this work, we investigated the optical absorption in a quasi-one-dimensional system subjected to an external electromagnetic wave. The optical absorption coefficient was calculated by using the perturbation theory taking account of the effect of the electron - impurity interaction. The numerical result for the GaAs/AlAs cylindrical semiconductor quantum wire showed the presence of the resonant absorption peaks.

6p viberkshire 09-08-2023 7 3   Download

We study the linear, third-order nonlinear, and total absorption coefficients (OACs) caused by intra- and inter-band transitions in monolayer MoSe2 in the presence of a magnetic field by using the compact density matrix approach.

6p vispiderman 15-06-2023 8 2   Download

N-doped TiO2 nanomaterials were prepared with the sol-gel method. The structure and properties of the materials were characterized by using XRD, UV-Vis, SEM, EDX, and IR techniques. The optimal amount of ammonium chloride in the mixture for doping is 600 mg. The optical absorption edge of N-TiO2 displays a redshift, and a long tail occurs in the presence of nitrogen in the material.

6p vispiderman 15-06-2023 4 2   Download

In this paper we present the development of a multi-axis differential optical absorption spectroscopy instrument capable of sensitively detecting NO2. The instrument collects the sun light scattered by the air molecules and aerosols in the atmosphere and measures the spectrum using a portable spectrometer of high sensitivity.

8p vispiderman 15-06-2023 3 2   Download

Based on rectangle-shaped structures, we create a dual-band metamaterial perfect absorber (DMPA) in the optical region. The independent-polarization absorption is a significant advantage as well as the simple integrated progress for constituent materials.

9p vispiderman 15-06-2023 5 3   Download

Silicon nanocrystals (Si NCs) have unique optical properties, such as, a wide range of absorption and excitation; color tunability; and monochromatic light emission, owing to its quantum confinement effect. Therefore, silicon nanocrystal materials become a vibrant research object in the world due to their potential application. In this report, we study the synthesis of silicon nanocrystal by magnesium directed reduction the silica nanoparticle (SiO2 NPs).

6p vicedric 08-02-2023 3 1   Download

In this study, the effects of Fe dopant on the structural, optical, and electrical properties of NiTiO3 materials prepared by sol-gel method were investigated. The prepared powders were investigated through X-ray diffraction, Raman scattering, scanning electron microscope, UV-visible absorption, vibrating sample magnetometer, electrical measurement to explore the structural, ferromagnetic, and electrical properties.

8p viporsche 25-10-2022 6 2   Download

In this work, we investigate the magneto-optical absorption in a phosphorene monolayer subjected to a perpendicular static magnetic field. The magneto-optical absorption power is calculated using the projection operator technique taking account of the effect of electron – optical phonon interaction. Numerical results showed that in the case of absence of any interaction, the higher the resonant frequency, the smaller absorbed power was.

7p vimelindagates 18-07-2022 6 2   Download

Improvement of the optical absorption coefficient is essential to enhance the light conversion efficiency of thin-film organic solar cells. Here we report the use of an external electric field as a novel switch to improve the optical absorption capacity of two-dimensional defect blue phosphorene (BlueP) systems.

11p vimelindagates 18-07-2022 4 2   Download

Ebook Principles of lasers and optics includes 7 contents: Scalar wave equations and diffraction of laser radiation, Gaussian modes in optical laser cavities and Gaussian beam optics, Guided wave modes and their propagation, Guided wave interactions and photonic devices, Macroscopic properties of materials from stimulated emission and absorption, Solid state and gas laser amplifier and oscillator, Semiconductor lasers.

262p coga81 26-06-2022 47 2   Download

In this work, energy dependence of thermoluminescence dosimeters (TLDs) and optically stimulated luminescence dosimeters (OSLDs) for photon by the computational and experimental results was studied. Mass energy-absorption coefficients [in µen/ρ (cm2 /g)] for calcium, sulfur, oxygen, aluminum, carbon and dysprosium using the Mathematica software were calculated.

11p viellenkullman 16-05-2022 9 1   Download

Quantum theory of nonlinear absorption of strong electromagnetic wave (EMW) by confined electrons in two - dimensional (2D) graphene without magnetic field has been studied by using the quantum kinetic equation in assumption of electron - optical phonon scattering. The analytic expression of absorption coefficient is obtained in 2D graphene.

9p viindranooyi 07-05-2022 11 2   Download