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Journal of Luminescence

The 7F0-5D0 two-photon transition: A test of theoretical models

J.C. Gâcon, B. Jacquier, J.F. Marcerou, Mohamed Bouazaoui, M. Kibler

Published Jan 1, 1990• 12 citations
Publisher
DOI
10.1016/0022-2313(90)90134-w

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Spectral hole burning in solids is a selective bleaching of a small portion of an inhomogeneously broadened optical transition by a laser. In the photon gated holeburning process spectral holes are burned in two steps. The first is provided by a narrow band laser resonant with the inhomogeneously broadened transition and the second (gating) can be initiated by a broad band light source. Photon gated spectral hole burning was reported recently in 7F0→5D0 and 7F0→5D1 absorption lines of Sm2+ in BaClF(1). In this poster we report on the spectral holeburning behaviour of 1F0→5D2 transition. We found that even in absence of additional light source for gating, permanent holes can be burned. This self gating behaviour is consistent with the observation that the optimum frequency following 5D0 excitation is ≈ 22 000cm-1 so that two photons of energy 5D2 - 7F0 are sufficient to produce photoionisation. We have analysed the light intensity dependance of hole area and a simple model indicate that the electron transfer following the photoionisation is strongly dependant on the ion - electron trap distance.