Výsledky vyhledávání - "T. O. Klaassen"

Akademický článek

Terahertz transient stimulated emission from doped silicon

Autor: S. G. Pavlov, N. Deßmann, A. Pohl, R. Kh. Zhukavin, T. O. Klaassen, N. V. Abrosimov, H. Riemann, B. Redlich, A. F. G. van der Meer, J.-M. Ortega, R. Prazeres, E. E. Orlova, A. V. Muraviev, V. N. Shastin, H.-W. Hübers

Publikováno v: APL Photonics, Vol 5, Iss 10, Pp 106102-106102-8 (2020)

Transient-type stimulated emission in the terahertz (THz) frequency range has been achieved from phosphorus doped silicon crystals under optical excitation by a few-picosecond-long pulses generated by the infrared free electron lasers FELIX and CLIO.

Externí odkaz: https://doaj.org/article/cbca8294ca58479581a4e5c72b4baf60

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Ionization Energies and Lifetime Broadening of Autoionizing States of the Hydrogen Atom in Strong Magnetic Fields: Theory vs. Experiment

Autor: T. O. Klaassen, W.Th. Wenckebach, A. v. Klarenbosch, K. K. Geerinck, C. T. Foxon

Publikováno v: Europhysics Letters (EPL). 13:237-242

Theoretical results for the ionization energies of some autoionizing states of the hydrogen atom in magnetic fields up to 5105 T, as obtained by Friedrich et al. (Phys. Rev. A, 28 (1983) 1423) are compared for the first time with experimental data, d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b015aecd2f6e12c3af8c3166a4b4f6e5
https://doi.org/10.1209/0295-5075/13/3/008

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Terahertz Silicon Lasers

Autor: S. G. Pavlov, H.-W. Hübers, M. H. Rümmeli, J. N. Hovenier, T. O. Klaassen, R. Kh. Zhukavin, A. V. Muravjov, V. N. Shastin

Publikováno v: Towards the First Silicon Laser ISBN: 9781402011948

Terahertz silicon lasers are based on intracenter transitions of group-V donors. The peculiarities due to electron-phonon interaction and the state-of-the-art performance such as frequency tunability by stress or magnetic field are discussed.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2074e22d4171e802f9bc9cd3a91910d3
https://doi.org/10.1007/978-94-010-0149-6_29

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Spin dynamics in a 3D Heisenberg ferromagnet. III. Influence of exchange anisotropy in the critical region: T>Tc, B=O

Autor: J. Labrujere, N.J. Poulis, G van Velzen, T O Klaassen

Publikováno v: Journal of Physics C: Solid State Physics. 15:6403-6410

For pt.II see ibid., vol.15, p.999 (1982). An introduction to the experimental and theoretical research of spin dynamics in the critical region of a 3D (weakly anisotropic) Heisenberg ferromagnet is presented. Nuclear spin lattice relaxation times (T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2388c13ec7adbd22f534f20dc91d8075
https://doi.org/10.1088/0022-3719/15/31/016

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Spin dynamics in a 3D Heisenberg ferromagnet in the paramagnetic state II

Autor: J. Labrujere, N.J. Poulis, T O Klaassen

Publikováno v: Journal of Physics C: Solid State Physics. 15:999-1014

In this paper experimental results on electron spin dynamics in a 3D Heisenberg ferromagnet are presented. These experimental results, the spectral densities phi 0+( omega ), phi 0z( omega ) and phi 01+( omega ) of the spin auto- and pair correlation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb53a5ccecaf535cefc67a7a89bcbfe0
https://doi.org/10.1088/0022-3719/15/5/018

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Spin dynamics in a 3D Heisenberg ferromagnet. IV. Influence of exchange anisotropy in the critical region: T0

Autor: N.J. Poulis, G van Velzen, T O Klaassen, J. Labrujere

Publikováno v: Journal of Physics C: Solid State Physics. 15:6411-6422

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::58cd4468e2a6dbe03292632d3866d439
https://doi.org/10.1088/0022-3719/15/31/017

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Spin dynamics in a 3D Heisenberg ferromagnet. V. Finite fields and temperatures

Autor: G van Velzen, L J de Haas, T O Klaassen, J. Labrujere, N.J. Poulis

Publikováno v: Journal of Physics C: Solid State Physics. 15:6423-6435

For pt.IV see ibid., vol.15, p.6411 (1982). An extension of the Resibois-De Leener model (1966) for spin correlation functions which includes the influence of external magnetic fields and finite temperatures is introduced. It is suggested here that,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed5cdaf5c7d18a675e61d58ef1bff15b
https://doi.org/10.1088/0022-3719/15/31/018

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MAGNETIC RESONANCE IN FERROMAGNETIC CRYSTALS WITH M2CuX4.2H2O STRUCTURE

Autor: T. O. Klaassen, N. J. Poulis

Publikováno v: Le Journal de Physique Colloques. 32:C1-1157

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85b0b6152ed70b8c8eeb64fb5e2efca5
https://doi.org/10.1051/jphyscol:19711414

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Dynamic properties of a 3d Heisenberg ferromagnet in the paramagnetic state

Autor: J. Labrujere, C.M.B. v.d. Zon, N.J. Poulis, T O Klaassen

Publikováno v: Journal of Magnetism and Magnetic Materials. :676-678

We present nuclear spin-lattice relaxation time measurements on 1 H and 87 Rb nuclei in single crystals of Rb 2 CuBr 4 2H 2 0 (3d Heisenberg ferromagnet, T c = 1.87 K ). From the angular dependence of T 1 , separate information on the field dependenc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebac9222e21d35338d94a6e6e21b6277
https://doi.org/10.1016/0304-8853(80)90716-7

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