There and back again: Extending optical storage lifetime by retrieving photon echoes from semiconductor spin excitations

(Phys.org) --For all of their differences, classical and quantum communication have at least one thing in common: the importance of being able to store optical information. That being said, optical storage is a complex process that depends largely on the material being used to convert, store and retrieve this information in a controllable, consistent manner - a process especially prone to short optimal memory times when implemented in certain semiconductor quantum structures. Recently, however, ...