Simultaneous slow and fast light in C60 solution

Zhongjie Chen, Bin Luo, Yu Liu +1 more

Bin Luo, Hong Mei Guo

Dispersion properties of an optical medium can be greatly changed using electromagnetically induced transparency (EIT) and other nonlinear effects. Thus, the group velocity of light pulse can be much smaller (greater or even negative) than light speed in vacuum, which is called slow (fast) light. Slow and fast light are very useful in optical processing, such as optical buffer, switching, and storage devices. Usually, slow and fast light cannot be generated simultaneously in the same medium. In this paper, we propose applicable level structures to generate controllable slow and fast light simultaneously at two frequencies, with the same polarization.

Boyd

Bin Luo, Hong Mei Guo

Simultaneous slow and fast light requires rf field [Opt. Lett. 35, 64 (2010)], which is inconvenient. We suggest that the rf field can be replaced by lights and thus, the phenomena can be realized optically.

Chris R. Fietz, Gennady B. Shvets

Two orthogonal light polarizations in a waveguide overcoupled to microring resonators can propagate as fast and slow light. Which polarization is fast (slow) is determined by input polarization and the number of resonators.