Diamond Materials

Diamond Materials for Quantum Application

23. September 2014: The DFG research group FOR 1493 “Diamond Materials and Quantum Applications” goes into its second funding period. FOR1493 is a national research consortium funded by the Deutsche Forsch-ungsgemeinschaft.

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ERC Advanced Grant


Production yield of rare-earth ions implanted into an optical crystal

Appl. Phys. Lett. 108, 053108 (2016);

Rare-earth (RE) ion doped crystals are well known due to their key application in laser technology. Latest research, however, suggests their usage in the field of quantum telecommunication as quantum memories or even for information processing. Their generation in a well chosen and engineered environment can act as a prerequisite for versatile implementation of RE ions in experiments and might enable a range of novel integrated photonic devices for quantum applications.

Controlled doping into desired locations of optical crystals was achieved by ion implantation. We have investigated the production yield of two RE species, namely cerium and praseodymium. 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.