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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Integrated and compact fiber-coupled single-photon system based on nitrogen-vacancy centers and gradient-index lenses

Tim Schroeder, Philip Engel, Eberhard Schmidt, and Oliver Benson (2012)

Integrated and compact fiber-coupled single-photon system based on nitrogen-vacancy centers and gradient-index lenses

Optics Letters, 37(14):2901-2903.

A fiber-coupled single-photon system is presented. Gradient-index lenses are utilized for single-photon collection and fiber coupling of a nitrogen-vacancy defect center in a nanodiamond. Integrated filter technology separates excitation and laser light. Therefore, the system is ultracompact with 120  mm3 in dimension as no bulky free beam optics are used. The commercial availability of all components and their simple assembly allows the implementation of a low-cost single-photon system, possibly approaching single-photon count rates of 500  kcts/s.

Link to paper