Rare-Earth Doped Photonics

Y. Fujiwara, Anthony Joseph Kenyon, B. Moine +1 more

Andrei Faraon

Thomas Kornher, Kangwei Xia, Roman L. Kolesov +9 more

Rare-earth (RE) ions doped into desired locations of optical crystals might enable a range of novel integrated photonic devices for quantum applications. With this aim, we have investigated the production yield of cerium and praseodymium by means of ion implantation. As a measure, the collected fluorescence intensity from both implanted samples and single centers was used. With a tailored annealing procedure for cerium, a yield up to 53% was estimated. Praseodymium yield amounts up to 91%. Such high implantation yield indicates a feasibility of creation of nanopatterned rare-earth doping and suggests strong potential of RE species for on-chip photonic devices.

Vincent Crozatier, Guillaume Gorju, F. de Sèze +3 more

We report, on the first experimental demonstration of photon echoes in an amplifying rare-earth ion-doped crystal. Population inversion is achieved via optical pumping yielding higher power photon echoes, with an energy gain up to 5.

Christoph Clausen, Imam Usmani, Félix Bussières +3 more

Two rare-earth-ion doped crystals were entangled by converting a single photon into a delocalized excitation. The excitation was subsequently converted back into a photon and the entanglement revealed by an estimation of the concurrence.

Andrei Faraon, Chun Ju Wu