Carbon nanotubes are original emitters with many advantages for future quantum telecommunications. Their adjustable gap through the radius of the nanotube, with the possibility of working easily at wavelengths of 1.5 μm suitable for transporting information by optical fiber, the ability to contact them electrically and their good optical behavior at room temperature are qualities that are quite unique in the world of nano-emitters competing for future quantum sources.
In addition, their uni-dimensional character and their original coupling to the phonons offer original resources to observe new effects in light-matter interaction and to create new functionalities for quantum-light sources.
In collaboration with the Atom Chip of the LKB team, we have developed a fully tunable fiber-based optical cavity technology, perfectly suited to nanotubes that show a high spectral dispersion. This device made it possible to obtain the first results on the emission of single photons by a nanotube in the Purcell regime, where the emission is exalted by more than one order of magnitude in the cavity mode, allowing an excellent directionality, an extraction efficiency close to 100% and a very good fidelity.
For more information, please visit our webpage and our recent publication: Widely Tunable Single-Photon Source from a Carbon Nanotube in the Purcell Regime - Jeantet, A. and Chassagneux, Y. and Raynaud, C. and Roussignol, Ph. and Lauret, J. S. and Besga, B. and Estève, J. and Reichel, J. and Voisin, C. Physical Review Letters 116, 247402 (2016)