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Letteratura scientifica selezionata sul tema "Inhomogeneous spectral line broadening"

Autore: Grafiati

Pubblicato: 21 dicembre 2024

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Articoli di riviste sul tema "Inhomogeneous spectral line broadening"

1

Igo, A. V. "Inhomogeneous size broadening of the Raman scattering spectral line in nanocrystals." Optics and Spectroscopy 120, no. 4 (2016): 529–33. http://dx.doi.org/10.1134/s0030400x16040093.

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2

Parker, J. C., and R. W. Siegel. "Raman microprobe study of nanophase TiO2 and oxidation-induced spectral changes." Journal of Materials Research 5, no. 6 (1990): 1246–52. http://dx.doi.org/10.1557/jmr.1990.1246.

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A Raman microprobe study of as-compacted nanophase TiO2 was carried out to investigate the spatial inhomogeneity of its anatase and rutile phases. Also, changes in the observed Raman spectra (line shifts and broadening) were investigated as a function of annealing at temperatures up to 600°C in argon or air. Microscopic phase inhomogeneity is observed and Raman spectral changes are shown to result from inhomogeneous oxygen deficiency in the nanophase TiO2. The line positions corresponding to the Raman active Eg modes in both anatase and rutile are found to be sensitive to this oxygen deficienc

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3

Maniloff, Eric S., Alan E. Johnson, and Thomas W. Mossberg. "Spectral Data Storage Using Rare-Earth-Doped Crystals." MRS Bulletin 24, no. 9 (1999): 46–50. http://dx.doi.org/10.1557/s0883769400053069.

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Conventional optical data-storage techniques, such as magneto-optic disks and CD-ROMs, record a single bit of information at each particular substrate location. In order to produce the gigabyte-class storage substrates demanded by today's computers using such conventional technologies, access to tens of billions of individual material locations is required. This brute-force approach to optical data storage has produced impressive results. However, there is increasing interest in methods for more efficiently accessing storage materials. One approach is to record multiple bits at a single storag

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4

Normani, Simone, Pavel Loiko, Roman Maksimov, et al. "Inhomogeneous spectral line broadening and site distribution in “mixed” Er:(Sc,Y)₂O₃ laser ceramics." EPJ Web of Conferences 309 (2024): 06009. http://dx.doi.org/10.1051/epjconf/202430906009.

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Erbium-doped “mixed” yttria-scandia (ScxY1-x)2O3 transparent laser ceramics were fabricated by vacuum sintering at 1750 °C from laser-ablated nanoparticles. Their absorption and mid-infrared emission properties were studied. The addition of Sc3+ induces a strong inhomogeneous spectral line broadening, modifies the crystal field and affects the distribution of Er3+ ions over C2 and C3i symmetry sites. Due to their broadband emission properties, Er:(ScxY1-x)2O3 ceramics are appealing for 2.8-μm lasers.

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5

Laman, N., S. Sree Harsha, and D. Grischkowsky. "Narrow-Line Waveguide Terahertz Time-Domain Spectroscopy of Aspirin and Aspirin Precursors." Applied Spectroscopy 62, no. 3 (2008): 319–26. http://dx.doi.org/10.1366/000370208783759768.

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Low frequency vibrational modes of pharmaceutical molecules are dependent on the molecule as a whole and can be used for identification purposes. However, conventional Fourier transform far-infrared spectroscopy (FT-IR) and terahertz time-domain spectroscopy (THz-TDS) often result in broad, overlapping features that are difficult to distinguish. The technique of waveguide THz-TDS has been recently developed, resulting in sharper spectral features. Waveguide THz-TDS consists of forming an ordered polycrystalline film on a metal plate and incorporating that plate in a parallel-plate waveguide, w

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6

Dragounová, Kateřina, Zdeněk Potůček, Štěpán Potocký, Zdeněk Bryknar, and Alexander Kromka. "Determination of temperature dependent parameters of zero-phonon line in photo-luminescence spectrum of silicon-vacancy centre in CVD diamond thin films." Journal of Electrical Engineering 68, no. 1 (2017): 74–78. http://dx.doi.org/10.1515/jee-2017-0010.

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Abstract In this work we present a methodological approach to the temperature dependence of photoluminescence (PL) emission spectra of the silicon-vacancy centre in diamond thin films prepared by chemical vapour deposition. The PL spectra were measured in the temperature range of 11 - 300 K and used to determine the temperature dependence of the zero-phononline full-width at half-maximum and of the peak position. Experimental data were fitted by models of lattice contraction, quadratic electron-phonon coupling, homogeneous and inhomogeneous broadening. We found that the shift of peak position

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7

Astakhov, G. V., V. P. Kochereshko, V. A. Kosobukin, et al. "Model Study of Inhomogeneous Line Broadening in Excitonic Spectra of Quantum Wells." Acta Physica Polonica A 94, no. 2 (1998): 235–39. http://dx.doi.org/10.12693/aphyspola.94.235.

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8

Liu, G. K., Jin Huang, and James V. Beitz. "Microscopic nature of inhomogeneous line broadening: Analysis of the excitation-line-narrowing spectra ofCf4+inCeF4." Physical Review B 48, no. 18 (1993): 13351–60. http://dx.doi.org/10.1103/physrevb.48.13351.

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9

Кочаровская, Е. Р., А. В. Мишин, И. С. Рябинин та В. В. Кочаровский. "Особенности одновременной генерации низко- и высокодобротных мод в гетеролазерах на квантовых точках с большим временем некогерентной релаксации оптических дипольных колебаний". Физика и техника полупроводников 53, № 10 (2019): 1329. http://dx.doi.org/10.21883/ftp.2019.10.48285.31.

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We investigate the features of multimode steady-state generation of the superradiant heterolasers which have an active medium formed by the quantum dots with long incoherent relaxation time and a cavity of a combined Fabry-Perot type with a distributed feedback of the counter-propagating waves. We show that a quantum-coherent dynamics of the optical dipole oscillations and a population inversion of the working levels in an ensemble of the quantum dots with a strong inhomogeneous broadening of a spectral line may lead to a simultaneous lasing of modes with a various degree of phasing and/or cor

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10

Wei, Zhiliang, Jian Yang, Youhe Chen, Yanqin Lin, and Zhong Chen. "Line broadening interference for high-resolution nuclear magnetic resonance spectra under inhomogeneous magnetic fields." Journal of Chemical Physics 142, no. 13 (2015): 134202. http://dx.doi.org/10.1063/1.4916520.

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