منابع مشابه
Effect of impurities on the optical properties of KTP single crystals grown from flux
In the present work, KTP crystals have been grown by spontaneous nucleation technique in flux medium using K6P4O13 flux. 0.4-1 °C/h cooling rates were applied in the spontaneous nucleation process. The presence and amount of impurities has been determined by using XRF. The optical transmission spectra of impure KTP crystals in the UV–visible region are discussed. The transmission cut-off is cle...
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-The optical absorption of CdIn2S4 single crystals has been measured at several temperatures in the spectral range from 0.4 to 0.8 p. The interband gap for the indirect allowed transition was found to have a temperature coefficient of 9.5 X 10J eV/deg between 100 K and 300 K and to have a value of 2.7 eV when extrapolated to 0 K. From a temperature dependence of the photocurrent corresponding t...
متن کاملPhotoassisted Scanning Tunneling Microscopy and Tunneling Spectroscopy of n-Type Tungsten Diselenide (n- WSe2) Single Crystals
The van der Waals surface (perpendicular to the c axis) of a nondegenerate n-type WSe2 single crystal was imaged at negative substrate bias voltage (V) in the constant-current mode in air with a scanning tunneling microscope (STM) combined with optical excitation techniques. A current (i) image at a positive bias under steady-state illumination, obtained simultaneously with the topographic imag...
متن کاملChiral Multichromic Single Crystals for Optical Devices
This report summarizes our findings during the study of a novel system that yields multicolored materials as products. This system is quite unusual as it leads to multi-chromic behavior in single crystals, where one would expect that only a single color would exist. We have speculated that these novel solids might play a role in materials applications such as non-linear optics, liquid crystal d...
متن کاملSingle photon emitters in exfoliated WSe2 structures.
Crystal structure imperfections in solids often act as efficient carrier trapping centres, which, when suitably isolated, act as sources of single photon emission. The best known examples of such attractive imperfections are well-width or composition fluctuations in semiconductor heterostructures (resulting in the formation of quantum dots) and coloured centres in wide-bandgap materials such as...
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ژورنال
عنوان ژورنال: Bulletin of Materials Science
سال: 1980
ISSN: 0250-4707,0973-7669
DOI: 10.1007/bf02802066