One-dimensional ultracold medium of extreme optical depth.

We report on the preparation of a one-dimensional ultracold medium in a hollow-core photonic crystal fiber, reaching an effective optical depth of 1000(150). We achieved this extreme optical depth by transferring atoms from a magneto-optical trap into a far-detuned optical dipole trap inside the hollow-core fiber, yielding up to 2.5(3)×10(5) atoms inside the core with a loading efficiency of 2.5(6)%. The preparation of an ultracold medium of such huge optical depth paves the way toward new applications in quantum optics and nonlinear optics.

[1]  P. Altin,et al.  Gradient echo memory in an ultra-high optical depth cold atomic ensemble , 2012, 1211.7171.

[2]  V. Letokhov,et al.  Laser guiding of atoms in a hollow optical fiber , 1993 .

[3]  Cornell,et al.  Laser-guided atoms in hollow-core optical fibers. , 1995, Physical review letters.

[4]  Yi-Hsin Chen,et al.  Coherent optical memory with high storage efficiency and large fractional delay. , 2012, Physical review letters.

[5]  J. Marangos,et al.  Electromagnetically induced transparency : Optics in coherent media , 2005 .

[6]  Sebastian Will,et al.  Trapping of ultracold atoms in a hollow-core photonic crystal fiber , 2008, 0808.0054.

[7]  Alexander L. Gaeta,et al.  Low-Light-Level Optical Interactions with Rubidium Vapor in a Photonic Band-Gap Fiber , 2006 .

[8]  P. Russell.  Photonic Crystal Fibers , 2003, Science.

[9]  A. Gaeta,et al.  Generation of large alkali vapor densities inside bare hollow-core photonic band-gap fibers. , 2008, Optics express.

[10]  A. S. Zibrov,et al.  Stationary pulses of light in an atomic medium , 2003, Nature.

[11]  Ito,et al.  Laser spectroscopy of atoms guided by evanescent waves in micron-sized hollow optical fibers. , 1996, Physical review letters.

[12]  A. S. Zibrov,et al.  Laser-cooled atoms inside a hollow-core photonic-crystal fiber , 2011, 1104.5220.

[13]  L. Kwek,et al.  Luttinger liquid of photons and spin-charge separation in hollow-core fibers. , 2011, Physical review letters.

[14]  L. Tonks.  The Complete Equation of State of One, Two and Three-Dimensional Gases of Hard Elastic Spheres , 1936 .

[15]  Pritchard,et al.  High densities of cold atoms in a dark spontaneous-force optical trap. , 1993, Physical review letters.

[16]  Leong Chuan Kwek,et al.  Mimicking interacting relativistic theories with stationary pulses of light. , 2012, Physical review letters.

[17]  Cornell,et al.  Evanescent-wave guiding of atoms in hollow optical fibers. , 1996, Physical review. A, Atomic, molecular, and optical physics.

[18]  D. Angelakis,et al.  Sine-Gordon and Bose-Hubbard dynamics with photons in a hollow-core fiber , 2012 .

[19]  T. Halfmann,et al.  Thermometry of ultracold atoms by electromagnetically induced transparency , 2012 .

[20]  Dana Z. Anderson,et al.  Guiding laser-cooled atoms in hollow-core fibers , 2000 .

[21]  T. R. Gerholm.  Reports on progress in physics: Volume XIX (1956) (The Physical Society, London 1956, 367 pages price to non-fellows £ 2 10 s., to fellows, one copy, £ 1 7 s 6 d). , 1957 .

[22]  M. Girardeau,et al.  Relationship between Systems of Impenetrable Bosons and Fermions in One Dimension , 1960 .

[23]  Cornell,et al.  Reduction of light-assisted collisional loss rate from a low-pressure vapor-cell trap. , 1994, Physical review. A, Atomic, molecular, and optical physics.

[24]  B. Englert,et al.  Cavity quantum electrodynamics , 2006 .

[25]  K. Bongs,et al.  Efficient guiding of cold atoms through a photonic band gap fiber , 2010, 1010.0101.

[26]  Margarita A. Man’ko,et al.  Journal of Optics B: Quantum and Semiclassical Optics , 2003 .

[27]  M. Lukin,et al.  Efficient all-optical switching using slow light within a hollow fiber. , 2009, Physical review letters.

[28]  David E. Pritchard,et al.  Optics and interferometry with atoms and molecules , 2009 .

[29]  Dana Z. Anderson,et al.  Optical-Dipole-Force-Fiber Guiding and Heating of Atoms , 1997 .

[30]  D. E. Chang,et al.  Crystallization of strongly interacting photons in a nonlinear optical fibre , 2007, 0712.1817.

[31]  Hung-Wen Cho,et al.  Stationary light pulses in cold atomic media and without Bragg gratings. , 2008, Physical review letters.

[32]  Marco Barbieri,et al.  Efficient optical pumping and high optical depth in a hollow-core photonic-crystal fibre for a broadband quantum memory , 2012, 1212.0396.

[33]  T Takekoshi,et al.  Optical guiding of atoms through a hollow-core photonic band-gap fiber. , 2007 .

[34]  B. M. Rodríguez-Lara,et al.  Quantum simulation of Cooper pairing with photons , 2012 .