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Publications [#246381] of Daniel J. Gauthier
Papers Published
- Greenberg, JA; Gauthier, DJ, High-order optical nonlinearity at low light levels,
Epl (Europhysics Letters), vol. 98 no. 2
(April, 2012),
pp. 24001-24001, IOP Publishing, ISSN 0295-5075 [pdf], [doi]
(last updated on 2019/07/17)
Abstract: We observe a nonlinear optical process in a gas of cold atoms that simultaneously displays the largest reported fifth-order nonlinear susceptibility χ (5)=1.9×10 - 12 (m/V) 4 and high transparency. The nonlinearity results from the simultaneous cooling and crystallization of the gas, and gives rise to efficient Bragg scattering in the form of six-wave mixing at low light levels. For large atom-photon coupling strengths, the back-action of the scattered fields influences the light-matter dynamics. We confirm this interpretation by investigating the nonlinearity for different polarization configurations. In addition, we demonstrate excellent agreement between our experimental measurements and a theoretical model with no free parameters, and compare our results to those obtained using alternative approaches. This system may have important applications in many-body physics, quantum information processing, and multidimensional soliton formation. © Europhysics Letters Association 2012.
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