Raman gas self-organizing into deep nano-trap lattice.
Trapping or cooling molecules has rallied a long-standing effort for its impact in exploring new frontiers in physics and in finding new phase of matter for quantum technologies. Here we demonstrate a system for light-trapping molecules and stimulated Raman scattering based on optically self-nanostructured molecular hydrogen in hollow-core photonic crystal fibre. A lattice is formed by a periodic and ultra-deep potential caused by a spatially modulated Raman saturation, where Raman-active molecules are strongly localized in a one-dimensional array of nanometre-wide sections. Only these trapped molecules participate in stimulated Raman scattering, generating high-power forward and backward Stokes continuous-wave laser radiation in the Lamb-Dicke regime with sub-Doppler emission spectrum. The spectrum exhibits a central line with a sub-recoil linewidth as low as ∼14 kHz, more than five orders of magnitude narrower than conventional-Raman pressure-broadened linewidth, and sidebands comprising Mollow triplet, motional sidebands and four-wave mixing.
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.|Physics Department, University of Bath, Bath BA2 7AY, UK.
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M
Alharbi
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.|Max Born Institute of Nonlinear Optics and Short Pulse Spectroscopy, Berlin 12489, Germany.
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A
Husakou
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.
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M
Chafer
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.
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B
Debord
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.
F
F
Gérôme
GPPMM Group, XLIM Research Institute, CNRS UMR 7252, University of Limoges, Limoges 87410, France.|Physics Department, University of Bath, Bath BA2 7AY, UK.
F
F
Benabid
Chemphyschem. 2002 Sep 16;3(9):737-53
12436901
Phys Rev A Gen Phys. 1986 May;33(5):3113-3123
9897019
Phys Rev Lett. 2004 Sep 17;93(12):123903
15447265
Nature. 2010 Oct 14;467(7317):820-3
20852614
Chemphyschem. 2002 Jun 17;3(6):476-93
12465486
Phys Rev A. 1992 Dec 1;46(11):7060-7078
9908042
Nature. 2004 Nov 11;432(7014):200-3
15538363
Phys Rev A Gen Phys. 1986 Sep;34(3):1944-1951
9897479
Nature. 2000 Aug 3;406(6795):491-4
10952305
Phys Rev Lett. 1995 Nov 27;75(22):4011-4014
10059792
Science. 2002 Oct 11;298(5592):399-402
12376698
Nature. 2014 Aug 21;512(7514):286-9
25143111
Phys Rev Lett. 2004 Dec 10;93(24):243004
15697804