Hybrid quantum devices, incorporating both atoms and photons, are able to exploit the benefits of both systems. Compact, robust atom-photon interfaces will enable scalable architectures for quantum computing and quantum communication, as well as chip-scale sensors and single-photon sources. We demonstrate a new type of interface and show the interaction of cold cesium atoms with resonant photons. For this atoms are cooled in a magneto-optical trap, transferred to an optical dipole trap and positioned inside a transverse, 30 µm diameter through-hole in an optical fibre, created via laser micromachining. The intersection is orthogonal to the propagation direction of the light mode. We trap about 300 atoms at a temperature of 120µK. When the guided light is on resonance with the caesium D2 line, up to 87% of it is absorbed by the atoms. Our technique can be applied in 2-dimensional systems, i.e. in optical waveguide chips and other existing photonic systems. We also discuss the influence of hole shapes on transmission and prospects of adding a micro-cavity.
K. Bongs, V. Boyer, M. Cruise, A. Freise, M. Holynski, J. Hughes, A. Kaushik, Y.-H. Lien, A. Niggebaum, M. Perea-Ortiz, P. Petrov, S. Plant, Y. Singh, A. Stabrawa, D. Paul, M. Sorel, D. R. Cumming, J. Marsh, R. Bowtell, M. Bason, R. Beardsley, R. Campion, M. Brookes, T. Fernholz, T. Fromhold, L. Hackermuller, P. Krüger, X. Li, J. Maclean, C. Mellor, S. Novikov, F. Orucevic, A. Rushforth, N. Welch, T. Benson, R. Wildman, T. Freegarde, M. Himsworth, J. Ruostekoski, P. Smith, A. Tropper, P. Griffin, A. Arnold, E. Riis, J. Hastie, D. Paboeuf, D. Parrotta, B. Garraway, A. Pasquazi, M. Peccianti, W. Hensinger, E. Potter, A. Nizamani, H. Bostock, A. Rodriguez Blanco, G. Sinuco-Leon, I. Hill, R. Williams, P. Gill, N. Hempler, G. P. Malcolm, T. Cross, B. O. Kock, S. Maddox, P. John
The UK National Quantum Technology Hub in Sensors and Metrology is one of four flagship initiatives in the UK National of Quantum Technology Program. As part of a 20-year vision it translates laboratory demonstrations to deployable practical devices, with game-changing miniaturized components and prototypes that transform the state-of-the-art for quantum sensors and metrology. It brings together experts from the Universities of Birmingham, Glasgow, Nottingham, Southampton, Strathclyde and Sussex, NPL and currently links to over 15 leading international academic institutions and over 70 companies to build the supply chains and routes to market needed to bring 10–1000x improvements in sensing applications. It seeks, and is open to, additional partners for new application development and creates a point of easy open access to the facilities and supply chains that it stimulates or nurtures.
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