We study electromagnetically induced transparency (EIT) and nonlinear pulse propagation in a resonant atomic gas confined in a microwaveguide. We find that the quantum-interference effect in this system can be greatly enhanced due to the reduction of the mode volume of the optical field. In particular, compared with atomic gases in free space, the EIT transparency window in the present confined system can be much wider and deeper, the group velocity of the probe field can be much slower, and the Kerr nonlinearity of the system can be much stronger. We show that a more efficient production of ultraslow optical solitons in the present system may be achieved with much slower propagating velocity and lower generation power. Features of EIT and pulse propagation in the present system are very promising for practical applications in optical information processing and transmission.
© 2012 Optical Society of America
Original Manuscript: August 22, 2012
Revised Manuscript: October 31, 2012
Manuscript Accepted: November 24, 2012
Published: December 19, 2012
Liang Li, Chengjie Zhu, L. Deng, and Guoxiang Huang, "Electromagnetically induced transparency and nonlinear pulse propagation in an atomic medium confined in a waveguide," J. Opt. Soc. Am. B 30, 197-204 (2013)