Applied Physics, 9788131791813, S. Mani Naidu, 2010, Pearson ...

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Positron dynamics in solids, applied Physics. Download PDF. Applied Physics. October 1974 , Volume 5, Issue 1, pp 1-23 |
Applied Physics, 9788131791813, S. Mani Naidu, 2010, Pearson Education India, 2010 Theory of direct optical transitions in an optical indirect semiconductor with a superlattice structure, starting from a model of an indirect optical semiconductor with two bands, the electron states are calculated in the presence of an additional periodic one-dimensional potential (superlattice) in the semiconductor material. These states are used to determine. Photorefractive centers in LiNbO3, studied by optical-, Mössbauer-and EPR-methods, the photorefractive properties of LiNbO 3∶ Fe and LiNbO 3∶ Cu have been studied in combination with optical absorption-, Mössbauer-and EPR-measurements. The charge states of Fe in successively reduced LiNbO 3∶ Fe have been investigated with respect. Size-dependent colors and luminescences of organic microcrystals, perylene microcrystals with different sizes from about 50 nm to about 200 nm were prepared using the reprecipitation method. Their excitonic absorption peaks were found to shift to the high energy side with decreasing crystal size, that is to say, the shifts from that of the bulk. Positron dynamics in solids, applied Physics. Download PDF. Applied Physics. October 1974 , Volume 5, Issue 1, pp 1-23 | Cite as. Positron dynamics in solids. Authors; Authors and affiliations. Werner Brandt. Invited Paper First Online: 28 September 2013. Received: 02 January 1974. Accepted: 16 May 1974. A one-dimensional SiGe superlattice grown by UHV epitaxy, one-dimensional SiGe superlattices with periods ranging from 100 to 800 Ã… have been deposited on Si substrates by periodically varying the Ge content of a mixed Si 1-x Ge x multilayer structure from x= 0 to x= 0.15. The deposition was successful, employing. Diffraction efficiency and energy transfer in two-wave mixing experiments with Bi12SiO20 crystals, the diffraction efficiency and energy transfer are investigated in photorefractive Bi 12 SiO 20 crystals (BSO). Dependence on fringe spacing, electric fields, light intensity and rise-time constants are reported. The optimum crystallographic orientation for each effect. Mössbauer studies of thermal excitations in magnetically ordered microcrystals, a simple model is developed to explain the often-observed diminished values of the magnetic hyperfine fields in microcrystals. It is shown that below the superparamagnetic blocking temperature thermally excited oscillations of the magnetization around an energy. Raman spectroscopyâ ”A versatile tool for characterization of thin films and heterostructures of GaAs and AlxGa1− xAs, it is shown that Raman spectroscopy can provide useful information on characteristic properties of thin crystalline films of compound semiconductors. Crystal orientation, carrier concentration, scattering times of charge carriers, composition of mixed crystals and depth. Adsorption sites of CO on Pt (111, the surface vibrations of CO adsorbed on Pt (111) single crystal surfaces at 320 K have been studied by electron-energy-loss spectroscopy. At low coverages two vibration modes at 58 and∼ 260 meV are observed. For exposures> 0.2 Langmuir two additional modes. Secondary-ion emission of amino acids, secondary-ion mass spectroscopy (SIMS) is a hydrogen, isotope and compound sensitive analytical technique of extremely high absolute sensitivity. Continuing earlier measurements for carboxylic acids, adsorbed alcohols etc., we have carried out a systematical investigation. Electroluminescence in organic films with three-layer structure, we have succeeded in the fabrication of a stable organic electroluminescent (EL) device with a threelayer structure; hole transport layer/emitting layer/electron transport layer. The EL device was prepared by vacuum evaporation. Efficient carrier double injection into. Application of amorphous silicon field effect transistors in addressable liquid crystal display panels, it is shown that thin-film field effect transistors (FETs) made from amorphous (a-) silicon deposited by the glow-discharge technique have considerable potential as switching elements in addressable liquid crystal display panels. The fabrication of the elements. On electromagnetic waves in chiral media, we analyze the propagation of electromagnetic waves through chiral media, ie, through composite media consisting of macroscopic chiral objects randomly embedded in a dielectric. The peculiar effects that such media have on the polarization properties. Non-linear Ramsey resonance in the optical region, the interaction of gas particles with three separated light fields has been considered. It has been shown that a resonance with the width equal to the reciprocal transit time appears in such a system. The resonance is due to coherence conservation and change of distribution. High-voltage photovoltaic effect in PbTiO3-based ceramics, the existence of the photovoltaic effect has been confirmed in 0.895 PbTiO 3-0.105 La (Zn 2/3 Nb 1/3) O 3 solid solution ceramics with and without MnO 2 doping. The electrode-configuration dependence, illumination response and aging effect of the photovoltaic current. Double correlation technique (DDLTS) for the analysis of deep level profiles in semiconductors, a very sensitive technique is presented which can be applied to determine deep level profiles in space-charge layers of Schottky barriers or pn-junctions. The method uses an extended transient capacitance technique with correlation similar to Lang's DLTS technique. Acoustic fields and waves in solids, aCOUSTIC FIELDS AND WAVES IN SOLIDS VOLUME I BA AULD Senior Research Associate in the WW Hansen Laboratories of Physics and Lecturer in Applied Physics Stanford University A WILEY-INTERSCIENCE PUBLICATION JOHN WILEY & SONS New York London. Organic electroluminescent device with a three-layer structure, an electroluminescent device with a three-layer structure was constructed using an intensely fluorescent material, 12-phthaloperinone derivative, for the emitter material. The cell structure of Mg-electrode/amorphous electron-transport layer/polycrystalline emitting. Unified theory of Rayleigh-angle phenomena for acoustic beams at liquid-solid interfaces, various phenomena have been observed when a bounded acoustic beam is incident from a liquid onto the surface of a solid at or near the Rayleigh angle. These phenomena include: a shift of the reflected beam from the position predicted by geometrical acoustics, a null. Vaporâ liquidâ solid mechanism of single crystal growth, detailed studies of the morphology and growth of silicon whiskers 1 have led to a new concept of crystal growth from the vapor, which we call here the vapor-liquid-solid (VLS) mechanism. From these and subsequent studies, in which Si whiskers were grown.