Wells JP, Rella CW, Bradley IV, Galbraith I, Pidgeon CR. Coherent dynamics of the localized vibrational modes of hydrogen in CaF2.
PHYSICAL REVIEW LETTERS 2000;
84:4998-5001. [PMID:
10990851 DOI:
10.1103/physrevlett.84.4998]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/1999] [Indexed: 05/23/2023]
Abstract
We report the observation of giant quantum coherence effects in the localized modes of ionized hydrogen in synthetic fluorite. Infrared free induction decay experiments on the substitutional H- center show dramatic modulations at negative delay times due to interference between multiple vibrational levels. Spectrally resolving the degenerate four wave mixing signal allows unambiguous assignments of the participating vibrational states. The dependence of the signal intensity upon the delay path between the exciting free electron laser pulses can be accounted for in terms of the resonant third order polarization with a common dephasing time for the excited states.
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