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arXiv · 1604.02374

High resolution transient and permanent spectral hole burning in Ce$^{3+}$:Y$_2$SiO$_5$ at liquid helium temperatures

Jenny Karlsson·Adam N. Nilsson·Diana Serrano·Andreas Walther·Lars Rippe·Stefan Kröll·Philippe Goldner·Alban Ferrier
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Abstract

We perform hole burning with a low drift stabilized laser within the zero phonon line of the 4f-5d transition in Ce$^{3+}$:Y$_2$SiO$_5$ at 2K. The narrowest spectral holes appear for small applied magnetic fields and are $6\pm4$ MHz wide (FWHM). This puts an upper bound on the homogeneous linewidth of the transition to $3\pm2$ MHz, which is close to lifetime limited. The spin level relaxation time is measured to $72\pm21$ ms with a magnetic field of 10 mT. A slow permanent hole burning mechanism is observed. If the excitation frequency is not changed the fluorescence intensity is reduced by more than 50$\%$ after a couple of minutes of continuous excitation. The spectral hole created by the permanent hole burning has a width in the tens of MHz range, which indicates that a trapping mechanism occurs via the 5d-state.

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Jenny Karlsson, Adam N. Nilsson, Diana Serrano, Andreas Walther, Lars Rippe, Stefan Kröll, Philippe Goldner, Alban Ferrier. 2016-04-08. High resolution transient and permanent spectral hole burning in Ce$^{3+}$:Y$_2$SiO$_5$ at liquid helium temperatures. https://doi.org/10.1103/physrevb.93.224304

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