Quantum optics with nanopositioned single emitters

 The coupling of a single quantum object to degrees of freedom in its environment is a central theme in quantum optical science and engineering. Studying and engineering such couplings is not only of fundamental interest, but may also lead to dramatic improvements in fluorescence detection efficiency, ultrasensitive magnetometry, and applications in quantum information processing. Controlled and precise positioning of the quantum object under study is essential for many of these experiments. We have developed a unique technique that allows high-accuracy positioning of individual diamond nanocrystals with a single NV center.
Collaboration with Tjerk Oosterkamp (Leiden University) and Dirk Bouwmeester (Leiden University/UCSB)

Recent achievements:

Engineering of spontaneous emission of a single emitter in diamond

We demonstrated deterministic coupling of single nitrogen-vacancy (NV) centers to high-quality photonic crystal cavities. We preselected single NV centers and positioned their 50-nm-sized host nanocrystals into the mode maximum of photonic crystal cavities with few-nanometer accuracy.

T. van der Sar, J. Hagemeier, W. Pfaff, E.C. Heeres, S.M. Thon, H. Kim, P.M. Petroff, T.H. Oosterkamp, D. Bouwmeester, and R. Hanson, Applied Physics Letters 98, 193103 (2011).

Positioning single emitters with nanometer accuracy

The positioning is done with a home-built nanomanipulator under real-time scanning electron imaging, yielding an accuracy of a few nanometers.

T. van der Sar, E. C. Heeres, G. M. Dmochowski, G. de Lange, L. Robledo, T. H. Oosterkamp, and R. Hanson, Appl.Phys. Lett. 94, 173104 (2009).
Movie showing in real-time how a nanodiamond is picked up with the nanomanipulator.
Movie showing in real-time how a nanodiamond is positioned into a hole of a photonic crystal.
Press release by FOM (in Dutch).Article in Nederlands Tijdschrift voor Natuurkunde (november 2009) (in Dutch).