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Second-harmonic free-induction decay in a two-level spin system

1983; American Institute of Physics; Volume: 28; Issue: 1 Linguagem: Inglês

10.1103/physreva.28.495

0556-2791

R. Boscaino, F. M. Gelardi, Giuseppe Messina,

Quantum optics and atomic interactions

Two-photon free-induction decay (FID) was experimentally investigated in a two-level electron-spin system by revealing the second-harmonic wave emitted by the system. Oscillatory FID signals were detected for large-area pulses of the input power, analogously to recent observations by Kunitomo et al. for single-quantum resonances. Moreover, the measured decay time of the FID signal following a steady-state preparation was found to be larger than the theoretical value by a few orders of magnitude.