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

Abstract

Optical nanofiber (ONF) is a special tool to achieve the interaction between light and matter with ultralow power. In this paper, we demonstrate V-type electromagnetically induced transparency (EIT) in cold atoms trapped by an ONF-based two-color optical lattice. At an optical depth of 7.35, 90% transmission can be achieved by only 7.7 pW coupling power. The EIT peak and linewidth are investigated as a function of the coupling optical power. By modulating the picowatt-level control beam of the ONF-EIT system in sequence, we further achieve efficient and high contrast control of the probe transmission, as well as its potential application in the field of quantum communication and quantum information science using one-dimensional atomic chains.

Influence of Kerr Effect on Second-Order Nonlinearity Induced Transparency

“…We have learned that, as the Kerr coefficient for third-order nonlinear effects in nonlinear materials [22][23][24][25][26][27][28] , it is usually a small quantity. In order to discuss its effect on second-order nonlinearity induced transparency, we use available experimental data to estimate the magnitude of the Kerr nonlinearity coefficient.…”

Electric field intensity measurement by using doublet electromagnetically induced transparency of cold Rb Rydberg atoms

“…[16] An all-optical sensing method based on Rydberg electromagnetically induced transparency (EIT) is usually used to measure the electric field intensity because of the nondestructive detection mechanism. In general, the Rydberg EIT spectrum is observed by scanning the frequency of a probe (coupling) laser with an acousto-optic modulator (AOM), where the frequencies of both probe laser and coupling laser need to be locked by various techniques, [17,18] such as saturated absorption spectroscopy (SAS), EIT spectroscopy or Pound-Drever-Hall spectroscopy, etc. However, these frequency locking techniques need to be implemented in an elaborate experimental setup that may require expensive equipment and potentially timing sequence control.…”