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G Blasse - One of the best experts on this subject based on the ideXlab platform.
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spectral Line Broadening study of the trivalent lanthanide ion series i Line Broadening as a probe of the electron phonon coupling strength
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, G BlasseAbstract:Line Broadening is evaluated as a method to probe an electron-phonon coupling strength of lanthanide ions. Various problems which complicate the analysis of Line Broadening, like a contribution of different relaxation processes and the difference in behavior for different transitions in the same system are discussed, using ${\mathrm{LiYF}}_{4}$ :${\mathrm{Eu}}^{3+}$ and ${\mathrm{LiYF}}_{4}$ :${\mathrm{Pr}}^{3+}$ as examples.mThe results show that the electron-phonon coupling parameter \ensuremath{\alpha}-bar, derived from a fit to the Raman two-phonon process for different transitions, provides a good estimate of an electron-phonon coupling strength. In a second paper this Line-Broadening method is used to probe the variation of the electron-phonon coupling strength through the trivalent lanthanide-ion series.
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spectral Line Broadening study of the trivalent lanthanide ion series ii the variation of the electron phonon coupling strength through the series
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, M L H Ter Heerdt, Rene Theodorus Wegh, G BlasseAbstract:The variation of an electron-phonon coupling strength of lanthanide ions is evaluated by measuring the temperature-dependent Line Broadening of a large number of 4f transitions of nine lanthanide ions. The results show that the electron-phonon coupling strength derived from these Line-Broadening experiments is large in the beginning (${\mathrm{Ce}}^{3+}$,${\mathrm{Pr}}^{3+}$,${\mathrm{Nd}}^{3+}$ ) and the end (${\mathrm{Er}}^{3+}$,${\mathrm{Tm}}^{3+}$,${\mathrm{Yb}}^{3+}$ ) of the trivalent lanthanide-ion series, but small at the center (${\mathrm{Eu}}^{3+}$,${\mathrm{Gd}}^{3+}$,${\mathrm{Tb}}^{3+}$ ). This trend can qualitatively be explained by the lanthanide contraction and the shielding of the 4f electrons.
A Ellens - One of the best experts on this subject based on the ideXlab platform.
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spectral Line Broadening study of the trivalent lanthanide ion series i Line Broadening as a probe of the electron phonon coupling strength
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, G BlasseAbstract:Line Broadening is evaluated as a method to probe an electron-phonon coupling strength of lanthanide ions. Various problems which complicate the analysis of Line Broadening, like a contribution of different relaxation processes and the difference in behavior for different transitions in the same system are discussed, using ${\mathrm{LiYF}}_{4}$ :${\mathrm{Eu}}^{3+}$ and ${\mathrm{LiYF}}_{4}$ :${\mathrm{Pr}}^{3+}$ as examples.mThe results show that the electron-phonon coupling parameter \ensuremath{\alpha}-bar, derived from a fit to the Raman two-phonon process for different transitions, provides a good estimate of an electron-phonon coupling strength. In a second paper this Line-Broadening method is used to probe the variation of the electron-phonon coupling strength through the trivalent lanthanide-ion series.
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spectral Line Broadening study of the trivalent lanthanide ion series ii the variation of the electron phonon coupling strength through the series
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, M L H Ter Heerdt, Rene Theodorus Wegh, G BlasseAbstract:The variation of an electron-phonon coupling strength of lanthanide ions is evaluated by measuring the temperature-dependent Line Broadening of a large number of 4f transitions of nine lanthanide ions. The results show that the electron-phonon coupling strength derived from these Line-Broadening experiments is large in the beginning (${\mathrm{Ce}}^{3+}$,${\mathrm{Pr}}^{3+}$,${\mathrm{Nd}}^{3+}$ ) and the end (${\mathrm{Er}}^{3+}$,${\mathrm{Tm}}^{3+}$,${\mathrm{Yb}}^{3+}$ ) of the trivalent lanthanide-ion series, but small at the center (${\mathrm{Eu}}^{3+}$,${\mathrm{Gd}}^{3+}$,${\mathrm{Tb}}^{3+}$ ). This trend can qualitatively be explained by the lanthanide contraction and the shielding of the 4f electrons.
Andries Meijerink - One of the best experts on this subject based on the ideXlab platform.
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spectral Line Broadening study of the trivalent lanthanide ion series i Line Broadening as a probe of the electron phonon coupling strength
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, G BlasseAbstract:Line Broadening is evaluated as a method to probe an electron-phonon coupling strength of lanthanide ions. Various problems which complicate the analysis of Line Broadening, like a contribution of different relaxation processes and the difference in behavior for different transitions in the same system are discussed, using ${\mathrm{LiYF}}_{4}$ :${\mathrm{Eu}}^{3+}$ and ${\mathrm{LiYF}}_{4}$ :${\mathrm{Pr}}^{3+}$ as examples.mThe results show that the electron-phonon coupling parameter \ensuremath{\alpha}-bar, derived from a fit to the Raman two-phonon process for different transitions, provides a good estimate of an electron-phonon coupling strength. In a second paper this Line-Broadening method is used to probe the variation of the electron-phonon coupling strength through the trivalent lanthanide-ion series.
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spectral Line Broadening study of the trivalent lanthanide ion series ii the variation of the electron phonon coupling strength through the series
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, M L H Ter Heerdt, Rene Theodorus Wegh, G BlasseAbstract:The variation of an electron-phonon coupling strength of lanthanide ions is evaluated by measuring the temperature-dependent Line Broadening of a large number of 4f transitions of nine lanthanide ions. The results show that the electron-phonon coupling strength derived from these Line-Broadening experiments is large in the beginning (${\mathrm{Ce}}^{3+}$,${\mathrm{Pr}}^{3+}$,${\mathrm{Nd}}^{3+}$ ) and the end (${\mathrm{Er}}^{3+}$,${\mathrm{Tm}}^{3+}$,${\mathrm{Yb}}^{3+}$ ) of the trivalent lanthanide-ion series, but small at the center (${\mathrm{Eu}}^{3+}$,${\mathrm{Gd}}^{3+}$,${\mathrm{Tb}}^{3+}$ ). This trend can qualitatively be explained by the lanthanide contraction and the shielding of the 4f electrons.
H Andres - One of the best experts on this subject based on the ideXlab platform.
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spectral Line Broadening study of the trivalent lanthanide ion series i Line Broadening as a probe of the electron phonon coupling strength
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, G BlasseAbstract:Line Broadening is evaluated as a method to probe an electron-phonon coupling strength of lanthanide ions. Various problems which complicate the analysis of Line Broadening, like a contribution of different relaxation processes and the difference in behavior for different transitions in the same system are discussed, using ${\mathrm{LiYF}}_{4}$ :${\mathrm{Eu}}^{3+}$ and ${\mathrm{LiYF}}_{4}$ :${\mathrm{Pr}}^{3+}$ as examples.mThe results show that the electron-phonon coupling parameter \ensuremath{\alpha}-bar, derived from a fit to the Raman two-phonon process for different transitions, provides a good estimate of an electron-phonon coupling strength. In a second paper this Line-Broadening method is used to probe the variation of the electron-phonon coupling strength through the trivalent lanthanide-ion series.
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spectral Line Broadening study of the trivalent lanthanide ion series ii the variation of the electron phonon coupling strength through the series
Physical Review B, 1997Co-Authors: A Ellens, H Andres, Andries Meijerink, M L H Ter Heerdt, Rene Theodorus Wegh, G BlasseAbstract:The variation of an electron-phonon coupling strength of lanthanide ions is evaluated by measuring the temperature-dependent Line Broadening of a large number of 4f transitions of nine lanthanide ions. The results show that the electron-phonon coupling strength derived from these Line-Broadening experiments is large in the beginning (${\mathrm{Ce}}^{3+}$,${\mathrm{Pr}}^{3+}$,${\mathrm{Nd}}^{3+}$ ) and the end (${\mathrm{Er}}^{3+}$,${\mathrm{Tm}}^{3+}$,${\mathrm{Yb}}^{3+}$ ) of the trivalent lanthanide-ion series, but small at the center (${\mathrm{Eu}}^{3+}$,${\mathrm{Gd}}^{3+}$,${\mathrm{Tb}}^{3+}$ ). This trend can qualitatively be explained by the lanthanide contraction and the shielding of the 4f electrons.
Armando Rastelli - One of the best experts on this subject based on the ideXlab platform.
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resolving the temporal evolution of Line Broadening in single quantum emitters
Optics Express, 2019Co-Authors: Christian Schimpf, Marcus Reindl, Petr Klenovský, Thomas Fromherz, Saimon Filipe Covre Da Silva, Julian Hofer, Christian Schneider, Sven Höfling, Rinaldo Trotta, Armando RastelliAbstract:Light emission from solid-state quantum emitters is inherently prone to environmental decoherence, which results in a Line Broadening and in the deterioration of photon indistinguishability. Here we employ photon correlation Fourier spectroscopy (PCFS) to study the temporal evolution of such a Broadening in two prominent systems: GaAs and In(Ga)As quantum dots. Differently from previous experiments, the emitters are driven with short laser pulses as required for the generation of high-purity single photons, the time scales we probe range from a few nanoseconds to milliseconds and, simultaneously, the spectral resolution we achieve can be as small as ∼ 2µeV. We find pronounced differences in the temporal evolution of different optical transition Lines, which we attribute to differences in their homogeneous Linewidth and sensitivity to charge noise. We analyze the effect of irradiation with additional white light, which reduces blinking at the cost of enhanced charge noise. Due to its robustness against experimental imperfections and its high temporal resolution and bandwidth, PCFS outperforms established spectroscopy techniques, such as Michelson interferometry. We discuss its practical implementation and the possibility to use it to estimate the indistinguishability of consecutively emitted single photons for applications in quantum communication and photonic-based quantum information processing.
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Resolving the temporal evolution of Line Broadening in quantum emitters.
Optics express, 2019Co-Authors: Christian Schimpf, Marcus Reindl, Petr Klenovský, Thomas Fromherz, Saimon Filipe Covre Da Silva, Julian Hofer, Christian Schneider, Sven Höfling, Rinaldo Trotta, Armando RastelliAbstract:Light emission from solid-state quantum emitters is inherently prone to environmental decoherence, which results in an inhomogeneous Line Broadening and in the deterioration of photon indistinguishability. Here we employ photon correlation Fourier spectroscopy (PCFS) to study the temporal evolution of such a Broadening for the biexciton and exciton emission in resonantly driven GaAs quantum dots. Differently from previous experiments, the time scales we probe range from a few nanoseconds to milliseconds and, simultaneously, the spectral resolution we achieve can be as small as 2 $\mu$eV. We find pronounced differences in the temporal evolution of the two Lines, which we attribute to differences in their homogeneous Linewidth and sensitivity to charge noise. We then analyze the effect of irradiation with additional white light, which reduces blinking at the cost of enhanced charge noise. Due to its robustness against experimental imperfections and its high temporal resolution and bandwidth, PCFS outperforms established spectroscopy techniques, such as Michelson interferometry. We discuss its practical implementation, its limitations, and the possibility to use it to estimate the indistinguishability of consecutively emitted single photons for applications in quantum communication and photonic-based quantum information processing.