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 +5

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 f…