Theory of Resonant Secondary Radiation due to Impurity Centres in Crystals

Hizhyakov, V.; Tehver, I.

doi:10.1002/pssb.19670210237

Cited by 366 publications

(50 citation statements)

References 5 publications

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“…A very elegant strategy to avoid even the explicit summation over all vibronic B states makes use of the transform theory developed by Hizhnyakov and Tehver [41]. Champion, Albrecht and associates [42,43] have exploited this method to quantitatively analyze the B-band REPs of some prominent modes in the Raman spectra of heme proteins.…”

Section: Theoretical Modeling Of Reps Of Other Porphyrins In Solutionmentioning

confidence: 99%

Polarized resonance Raman dispersion spectroscopy on metalporphyrins

Schweitzer‐Stenner

2001

J. Porphyrins Phthalocyanines

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ABSTRACT:Resonance Raman spectroscopy is an ideal tool to investigate the structural properties of chromophores embedded in complex (biological) environments. This holds particularly for metalporphyrins which serve as prosthetic group in various proteins. Resonance Raman dispersion spectroscopy involves the measurement of resonance excitation and depolarization ratios of a large number of Raman lines at various excitation energies covering the spectral region of the chromophore's optical absorption bands. Thus, one obtains resonance excitation profiles and the depolarization ratio dispersion of these bands. While the former contains information about the structure of excited electronic states involved in the Raman scattering process, the latter reflects asymmetric perturbations which lower the porphyrin macrocycle symmetry from ideal D 4h . The article introduces and compares different quantum mechanical approaches designed to quantitatively analyze both resonance excitation and the relationship between symmetry lowering and depolarization ratio dispersion.

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Section: Theoretical Modeling Of Reps Of Other Porphyrins In Solutionmentioning

confidence: 99%

Polarized resonance Raman dispersion spectroscopy on metalporphyrins

Schweitzer‐Stenner

2001

J. Porphyrins Phthalocyanines

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“…As seen from (E)g(E) the smooth variation of g(E), this energy is very close to the energy where the parabola alone has a f c2 (E) minimum. This minimum energy, is easily found E antires , by di †erentiating Eqn (14). It is convenient to express the result in units of the energy di †erence between the two states,…”

Section: Vibronic Scattering Equationsmentioning

confidence: 99%

The origin of anti-resonance in preresonance Raman scattering

Hassing

1997

J. Raman Spectrosc.

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The anti-resonance phenomenon in Raman scattering was studied in the preresonance region of an allowed electronic transition. It is shown that the anti-resonance in the scattering of both totally and non-totally symmetric modes can be explained in terms of an analytical model. The necessary and general conditions for obtaining an anti-resonance are derived. The importance of comparing resonance and preresonance data (showing the antiresonance e †ect), in order to obtain reliable molecular parameters from the experiments, is demonstrated. For both totally and non-totally symmetric modes it is shown that, depending on the nature and number of the electronic states that contribute to the scattering, the anti-resonance in the excitation proÐle may be followed by a dramatic dispersion in the depolarization ratio. By comparing model calculations of the depolarization ratio and the excitation proÐle with experimental data, it is shown that both of these quantities are needed in order to discriminate between di †erent theoretical models.

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“…It will be interesting to study the effect of a finite pulse width of the excitation, whereby the frequency correlation between the excitation light and the HHG photon can be clarified. Another interesting subject is the competition between the Raman scattering process and the luminescence process in coherent resonant scattering spectroscopy under an intense driving laser field [64][65][66][67]. A study of the effect of the excitation pulse width on the HHG is now underway.…”

Section: Discussionmentioning

confidence: 99%

Ultrafast Dynamics of High-Harmonic Generation in Terms of Complex Floquet Spectral Analysis

et al. 2018

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Abstract:We studied the high-harmonic generation (HHG) of a two-level-system (TLS) driven by an intense monochromatic phase-locked laser based on complex spectral analysis with the Floquet method. In contrast with phenomenological approaches, this analysis deals with the whole process as a coherent quantum process based on microscopic dynamics. We have obtained the time-frequency resolved spectrum of spontaneous HHG single-photon emission from an excited TLS driven by a laser field. Characteristic spectral features of the HHG, such as the plateau and cutoff, are reproduced by the present model. Because the emitted high-harmonic photon is represented as a superposition of different frequencies, the Fano profile appears in the long-time spectrum as a result of the quantum interference of the emitted photon. We reveal that the condition of the quantum interference depends on the initial phase of the driving laser field. We have also clarified that the change in spectral features from the short-time regime to the long-time regime is attributed to the interference between the interference from the Floquet resonance states and the dressed radiation field.

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Theory of Resonant Secondary Radiation due to Impurity Centres in Crystals

Cited by 366 publications

References 5 publications

Polarized resonance Raman dispersion spectroscopy on metalporphyrins

Polarized resonance Raman dispersion spectroscopy on metalporphyrins

The origin of anti-resonance in preresonance Raman scattering

Ultrafast Dynamics of High-Harmonic Generation in Terms of Complex Floquet Spectral Analysis

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