Bichromatic excitation of coherent Raman beats in rare-earth solids

Tilo Blasberg and Dieter Suter
Phys. Rev. B 51, 6309 – Published 1 March 1995
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Abstract

In coherent Raman beat experiments a laser field coherently scatters off a material excitation that evolves under the internal Hamiltonian of the system. The Raman signal, which is observed as a beat signal between the test laser and the scattered Raman field, provides information on energy-level splittings and dephasing rates. We propose a modification of this technique, which allows, in contrast to the conventional method, the excitation of coherent Raman beats also in systems with large sublevel splittings and small oscillator strengths. For this purpose, we use a bichromatic laser field to excite the coherent superposition in the medium. We calculate the evolution of the coherence during the laser excitation analytically and discuss its dependence on various experimental parameters. We compare the theoretical results with experimental data from Pr3+:YAlO3.

  • Received 26 July 1994

DOI:https://doi.org/10.1103/PhysRevB.51.6309

©1995 American Physical Society

Authors & Affiliations

Tilo Blasberg and Dieter Suter

  • Institut für Quantenelektronik, ETH Zürich, CH-8093 Zürich, Switzerland

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Issue

Vol. 51, Iss. 10 — 1 March 1995

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