Open AccessInteger and fractional electromagnetically induced Talbot effects in a ladder-type coherent atomic system
Author(s) -
Jinpeng Yuan,
Chengyin Wu,
Yihong Li,
Lirong Wang,
Yun Zhang,
Xiao Liu,
Suotang Jia
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.000092
Subject(s) - talbot effect , physics , rubidium , optics , diffraction , integer (computer science) , electromagnetically induced transparency , materials science , potassium , computer science , metallurgy , programming language
Both integer and fractional electromagnetically induced Talbot effects are experimentally investigated in a coherent rubidium 5S 1/2 - 5P 3/2 - 5D 5/2 ladder-type system. By launching a probe laser into a periodically modulated lattice constructed by two crossed coupling fields with a small angle inside the rubidium vapor, a high-resolution diffraction pattern is obtained. The diffraction pattern is reproduced completely at detection positions of an integer multiple of twice the Talbot lengths. Meanwhile, the fractional Talbot effect, presented as complicated subimages at special positions, is also clearly observed. Furthermore, the theoretical simulations are conducted and agree well with the experimental results. These results pave the way for studying the control of light dynamics based on the periodically modulated medium.