Superhyperfine induced photon-echo collapse of erbium in Y${}_2$SiO${}_5$

B. Car, J. -L. Le Gouët, T. Chanelière

We investigate the decoherence of Er${}^{3+}$ in Y${}_2$SiO${}_5$ at low magnetic fields using the photon-echo technique. We reproduce accurately a variety of the decay curves with a uni…