A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990
Two-pulse and stimulated photon echoes and spectral hole burning were measured on the transition from the lowest component of the 4I15/2 manifold to the lowest component of 4I13/2 of Er3+ in a silicate optical fiber at 1.6 K. The two-pulse echo decays gave decoherence times as long as 230 ns for magnetic fields above 2 T. A large field dependent contribution to the homogeneous line width of >2 MHz was found and interpreted in terms of coupling to magnetic tunneling modes (TLS) in the glass. The stimulated echoes measured at 2 T showed spectral diffusion of 0.8 MHz/decade of time between 0.4 and 500 μs. Spectral diffusion in this high field region is attributed to coupling to elastic TLS modes which have a distribution of flip rates in glasses. Time-resolved spectral hole burning at very low field showed stronger spectral diffusion of 5.7 MHz/decade of time, attributed to coupling to magnetic spin-elastic TLS modes. © 2007 Elsevier B.V. All rights reserved.
A. Gupta, R. Gross, et al.
SPIE Advances in Semiconductors and Superconductors 1990
J.H. Stathis, R. Bolam, et al.
INFOS 2005
B.A. Hutchins, T.N. Rhodin, et al.
Surface Science
T.N. Morgan
Semiconductor Science and Technology