Journal article Open Access

Mechanical tunability of an ultra-narrow spectral feature with uniaxial stress

Galland, N.; Lucic, N.; Fang, B.; Zhang, S.; Letargat, R.; Ferrier, A.; Goldner, P.; Seidelin, S.; Le Coq, Y.

Rare-earth doped crystals have numerous applications ranging from frequency metrology to quan- tum information processing. To fully benefit from their exceptional coherence properties, the effect of mechanical strain on the energy levels of the dopants - whether it is a resource or perturbation - needs to be considered. We demonstrate that by applying uniaxial stress to a rare-earth doped crystal containing a spectral hole, we can shift the hole by a controlled amount that is larger than the width of the hole. We deduce the sensitivity of Eu3+ ions in an Y2SiO5 matrix as a function of crystal site and the crystalline axis along which the stress is applied.

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