Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
116 0 |
SM ISO690:2012 URSACHI, Veaceslav, TIGINYANU, Ion, SIRBU, Lilian, ENACHI, Mihail. Luminescent materials based on semiconductor compound templates for random laser applications. In: Physica Status Solidi (C) Current Topics in Solid State Physics, 2009, vol. 6, pp. 1097-1104. ISSN 1862-6351. DOI: https://doi.org/10.1002/pssc.200881146 |
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Physica Status Solidi (C) Current Topics in Solid State Physics | ||||||
Volumul 6 / 2009 / ISSN 1862-6351 /ISSNe 1610-1642 | ||||||
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DOI:https://doi.org/10.1002/pssc.200881146 | ||||||
Pag. 1097-1104 | ||||||
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Rezumat | ||||||
A survey of methods for the preparation of luminescent nano-composite materials with the focus on random laser media on the basis of porous semiconductor and dielectric templates is presented. Media with controlled light scattering properties are prepared by electrochemical dissolution of semiconductor substrates, or by electrochemical oxidation of metallic foils. For the introduction of optical gain properties to highly scattering medium prepared by electrochemical technologies, methods for doping porous semiconductor GaP, GaAs and InP as well as dielectric Al2O 3 and TiO2 templates with rare earth elements (Eu, Er) and transition metals (Cr, Ti) were developed. The possibility of producing a medium with optical gain properties is demonstrated also by making use of ex-citonic effects such as exciton-exciton scattering and stimulated emission of electron-hole plasma. This approach is suitable for composite materials containing ZnO and ZnSe ingredients. A comparative analysis of the produced structures from the point of view of light emission efficiency, threshold for the onset of laser action, and other characteristics is presented. |
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Cuvinte-cheie Amplification, Chromium, Composite materials, Composite micromechanics, Dielectric materials, dissolution, electrochemical oxidation, Electrochemical properties, Erbium, Europium, Excitons, Gallium alloys, Laser applications, Laser beams, lasers, Luminescence, metal recovery, Optical gain, scattering, Semiconducting zinc compounds, transition metals, zinc oxide |
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