Optical Absorption Spectra of Vanadyl Ion (Impurities) in Three Host Crystal Compounds

Optical Absorption Spectra of Vanadyl Ion (Impurities) in Three Host Crystal Compounds

Vanadyl ions (V0 2 + ) occur coordinated to other groups both in solids and liquids, bringing the total coordination to five or six. Usually the metal ion is surrounded by a distorted octahedron of oxygen ligands. However, the behaviour of the unpaired electron in the vanadyl complexes is dominated by the strong V = 0 bonding; as a result, most of the complexes possess very nearly a square pyra...

Optical Absorption Spectra of Bipolarons

The absorption of large bipolarons is investigated using the path-integral method. The response of a bipolaron to an external electromagnetic field is derived in the framework of the memory function approach. The bipolaron optical absorption spectrum consists of a series of relatively narrow peaks. The peculiarities of the bipolaron optical absorption as a function of the frequency of the elect...

Two-photon absorption spectra of carotenoids compounds

Electron Paramagnetic Resonance and Optical Absorption Spectra of V 0 2 + in CsCl Single Crystals

In vanadium-doped CsCl crystals grown from aqueous solutions anisotropic EPR spectra due to V0 are observed and analyzed at room temperature. Evidence is presented that isotropic spectra of this ion observed in this and other compounds are due to inclusions of growth solution and not to rapid rotation of the vanadyl ion in the solid as normally assumed. At 77 K a well resolved vibrational progr...

Extending optical functions from IR to UV using single-crystal absorption spectra

Laboratory measurements of unpolarized and polarized absorption spectra of various samples and crystal stuctures of silicon carbide (SiC) are presented from 1200–35,000 cm (λ ∼ 8–0.28μm) and used to improve the accuracy of optical functions (n and k) from the infrared (IR) to the ultraviolet (UV). Comparison with previous λ ∼ 6–20μm thin-film spectra constrains the thickness of the films and ve...