Transient hole-burning and free induction decay as a probe of multi-timescale host spin dynamics in low-temperature ion-doped crystals

Pavel A. Apanasevich; Sergei Ya. Kilin; Alexander P. Nizovtsev; N. S. Onishchenko

doi:10.1117/12.239780

10 May 1996 Transient hole-burning and free induction decay as a probe of multi-timescale host spin dynamics in low-temperature ion-doped crystals

Pavel A. Apanasevich, Sergei Ya. Kilin, Alexander P. Nizovtsev, N. S. Onishchenko

Author Affiliations +

Proceedings Volume 2797, Nonlinear Spectroscopy and Ultrafast Phenomena; (1996) https://doi.org/10.1117/12.239780
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

Transient hole-burning and free induction decay (FID) in low-temperature ion-doped crystals are studied consistently using the model of two jump processes U^t equals U^t₁ + U^t₂ characterized by essentially different jump rates v₁ >> v₂ and distribution widths (sigma) ₁ << (sigma) ₂ for the impurity ion optical transition frequency fluctuations U^t due to the bulk and the frozen core spin flipping. At short pump/probe pulsewidth T and short delay time (tau) _d ((tau) _d, T << v₂^-1) the calculated hole shape is narrow with the hole width determined by U^t₁ process characteristics only. The hole width in this case coincides with the calculated FID rate. At long delay (tau) _d >= v₂^-1 the hole becomes a wide lorentzian with the halfwidth 2(sigma) ₂. The theory fits well the experimental data by A. Szabo et. al. on narrow hole burning and FID in ruby under low and high magnetic fields supposing the fluctuations U^t₁ to be rather slow ((sigma) ²₁/v²₁ equals 0.5).

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Pavel A. Apanasevich, Sergei Ya. Kilin, Alexander P. Nizovtsev, and N. S. Onishchenko "Transient hole-burning and free induction decay as a probe of multi-timescale host spin dynamics in low-temperature ion-doped crystals", Proc. SPIE 2797, Nonlinear Spectroscopy and Ultrafast Phenomena, (10 May 1996); https://doi.org/10.1117/12.239780

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