Nonlinear Optics with Tapered Fibers and Magneto-Optically Trapped Rubidium

Tapered optical fibers of sub-wavelength diameter present a promising means of integrating the light-atom interaction into larger scale devices. We present work on a tapered fiber system loaded by a magneto optical trap of Rubidium atoms, in which a combination of red and blue detuned beams create a one-dimensional lattice trap along the fiber. The same fiber is used for interacting with the atoms in the trap via the evanescent fields of light propagating along the fiber. Light storage has been demonstrated in a similar system with Cesium \footnote{Sayrin, Clausen, Albrecht, Schneeweiss, and Rauschenbeutel, Optica {\bf 2},353-356 (2015)}, and we believe that much nonlinear optics remains to be explored in this regime. We also plan to see how these nonlinear effects can be enhanced with the addition of a micro-resonator such as the ones in \footnote{Lu, Lee, Rogers, and Lin, Optics Express {\bf 25}, 30826-30832 (2014)}