Results 331 to 340 of about 240,081 (351)
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physica status solidi (b), 1988
AbstractThe photoluminescence and absorption in GaSe over the energy range 2.00 to 2.12 eV at 77 K is investigated under different conditions, namely with different excitation quantum energies and low and high pumping power. The observed features of the spectra are explained using the energetic band model proposed by Voitchovsky and Mercier.
Yu. G. Shekun +3 more
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AbstractThe photoluminescence and absorption in GaSe over the energy range 2.00 to 2.12 eV at 77 K is investigated under different conditions, namely with different excitation quantum energies and low and high pumping power. The observed features of the spectra are explained using the energetic band model proposed by Voitchovsky and Mercier.
Yu. G. Shekun +3 more
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Stimulated photoluminescence of ZnSe
Solid State Communications, 1982Abstract Emission spectra of CdTe at low temperature under high intensity optical pumping by means of a tunable dye laser are reported. We show that the optical gain process is enhanced when a high exciton density is achieved by means of quasi-resonant pumping.
CATALANO I. M. +3 more
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Photoluminescence of porous silicon
Journal of Luminescence, 1993Abstract Excitation spectroscopy of the luminescence, selective excitation photoluminescence, time-resolved photoluminescence and time-decay measurements of the photoluminescence have been carried out on various porous silicon samples. A very rich phenomenology of the luminescence has been measured.
Pavesi, Lorenzo, M. Ceschini, F. Rossi
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AIP Conference Proceedings, 2020
KMgAlF6 belongs to group of such hexafluoro-aluminates like LiCaAlF6 and LiBaAlF6, where they replace AlO3-3 by AlF6−3. KMgAlF6 crystallizes in cubic system with space group Fd[inline-math]m. Very less studies regarding its luminescence properties and crystal structure are available in the literature.
P. D. Belsare +2 more
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KMgAlF6 belongs to group of such hexafluoro-aluminates like LiCaAlF6 and LiBaAlF6, where they replace AlO3-3 by AlF6−3. KMgAlF6 crystallizes in cubic system with space group Fd[inline-math]m. Very less studies regarding its luminescence properties and crystal structure are available in the literature.
P. D. Belsare +2 more
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Physical Review Letters, 1969
Radiative recombination in gold, copper, and gold-copper alloys has been observed arising from transitions between electrons in conduction-band states below the Fermi level and holes in the $d$ bands generated by optical excitation.
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Radiative recombination in gold, copper, and gold-copper alloys has been observed arising from transitions between electrons in conduction-band states below the Fermi level and holes in the $d$ bands generated by optical excitation.
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Reciprocal-space analysis of photoluminescence and photoluminescence excitation spectra
Applied Physics Letters, 1996We show that energy positions of features in photoluminescence and photoluminescence excitation (PLE) spectra can be obtained more accurately by Fourier transforming segments of these spectra and analyzing the resulting coefficients in reciprocal space than by using conventional real-space analysis.
S. D. Yoo +3 more
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The photoluminescence of SrS:Cu nanophosphor
Nanotechnology, 2008Strontium sulfide doped with copper has been regarded as one of the most promising inorganic materials for the blue-green color phosphor. A wet chemical precipitation method with post-annealing is presented for the synthesis of copper-doped SrS nanoparticles. XRD studies revealed the phase purity of SrS particles with rocksalt structure.
Arun Aravind, M. K. Jayaraj, E.I. Anila
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Photoluminescence and photoluminescence excitation spectra of GaAs grown directly on Si
Solid State Communications, 1986ABSTRACTThe photoluminescence of GaAs/Si grown by OMCVD has been analyzed as a function of temperature and the dominant high temperature line identified as a conduction-band-to-valence-band transition. Photoluminescence excitation spectra indicate that the transition is excitonic at 4.2 K.
P. Norris +4 more
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Journal of Applied Spectroscopy, 1997
Photoluminescence spectra of diffusion layers of zinc-doped indium phosphide were investigated. A study was made of diffusion layers obtained in different regimes. A diffusion process was conducted for 30 and 60 min at temperatures of 450–500°C. The photoluminescence spectra consisted of bands with E1=1.145 eV, E2=1.37 eV, E3=1.345 eV, E4=1.15 eV ...
S. A. Malyshev +3 more
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Photoluminescence spectra of diffusion layers of zinc-doped indium phosphide were investigated. A study was made of diffusion layers obtained in different regimes. A diffusion process was conducted for 30 and 60 min at temperatures of 450–500°C. The photoluminescence spectra consisted of bands with E1=1.145 eV, E2=1.37 eV, E3=1.345 eV, E4=1.15 eV ...
S. A. Malyshev +3 more
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Photoluminescent Peptide Nanotubes
Advanced Materials, 2009Bioinspired fabrication of nanomaterials is coming into thespotlight recently as an alternative to conventional nanofabricationmethodssuchasphotolithography. Peptide-basednanofabricationisan attractive method for synthesizing novel nanomaterials becauseof the capacity of peptides for molecular recognition and ...
Ryu, J Ryu, Jungki +2 more
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