Electromagnetically induced transparency at optical nanofiber–cesium vapor interface*

Abstract

Optical nanofiber (ONF) is a special tool for effectively controlling coupling of light and atoms. In this paper, we study the ladder-type electromagnetically induced transparent (EIT) under ultralow power level in a warm cesium vapor by observing the transmission of ONF that couples the 6S → 6P Cs atoms in the presence of a 6P → 8S control beam through the same fiber. The linewidth and transmission of the EIT signal are investigated at different intensities of the control laser. In addition, we theoretically study the nonlinear interaction at the ONF interface using the multi-level density matrix equations, and obtain good agreements between theory and experiments. The results may have great significance for further study of optical nonlinear effect at low power level.

Variable optical chirality in atomic assisted microcavity*

“…And we find that the nanofiber with several-hundred nanometer in diameter can be surrounded by atoms, and the evanescent field of the propagating mode in the nanofiber can interact with the atoms. [22,23] 114207-5…”

Observation of V-type electromagnetically induced transparency and optical switch in cold Cs atoms by using nanofiber optical lattice

“…Sayrin et al [15] further succeeded in achieving the storage of light pulses in optical lattice based on nanofiber. Regards to ladder-type EIT-ONF system, Jones et al [16] and Liu et al [17] successively achieved EIT based on the ONFwarm rubidium and cesium atoms system by using coupling field with a power of mW-level. Kumar et al [18] demonstrated optical switching based on ONF-cold atom cloud system.…”