Eur. Phys. J. D (2016) 70: 269
https://doi.org/10.1140/epjd/e2016-70099-3

Regular Article

Coupling of single NV center to adiabatically tapered optical single mode fiber

¹ Lebedev Physical Institute RAS, 53 Leninskij Prospekt, Moscow 119991, Russia
² Russian Quantum Center, 100 Novaya St., Skolkovo, Moscow 143025, Russia
³ Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141700, Russia
⁴ Photonic Nano-Meta Technologies, The territory of Skolkovo Innovation Center, Str. Nobel b.7, 143026 Moscow, Russia
⁵ Texas A & M University, Physics Department, 4242 TAMU, College Station, TX, 77843, USA

^a e-mail: mrvorobus@gmail.com

Received: 15 February 2016
Received in final form: 18 July 2016
Published online: 22 December 2016

Abstract

We demonstrated a simple and reliable technique of coupling diamond nanocrystal containing NV center to tapered optical fiber. The NV center emission was collected by the fiber via nearfield interaction between NV center and the tapered portion of the fiber. Single photon statistics was demonstrated at the fiber end as well as up to 3 times improvement in collection efficiency with respect to our confocal microscope. Also, we carefully studied fluorescence of the fiber itself and were able to suppress it to the level lower than single photon emission from the NV center.