scholarly journals Observation of an Electromagnetically Induced Grating in Cold 85Rb Atoms

2020 ◽  
Vol 10 (17) ◽  
pp. 5740 ◽  
Author(s):  
Hengfei Zhang ◽  
Jinpeng Yuan ◽  
Shichao Dong ◽  
Chaohua Wu ◽  
Lirong Wang
Keyword(s):  
Diffraction Pattern ◽  
Cold Atoms ◽  
Electromagnetically Induced Transparency ◽  
Nondestructive Method ◽  
Probe Laser ◽  
Rubidium Atoms ◽  
Spatial Intensity Distribution ◽  
Coupling Laser ◽  
Electromagnetically Induced Grating ◽  
Induced Transparency

Electromagnetically induced grating (EIG) is extensively investigated as an artificial periodic structure in recent years owed to its simple reconfiguration and flexible adjustability. We report the experimental observation of EIG in cold rubidium atoms. The coupling and probe lasers are corresponding to the 5S1/2−5P1/2 and 5S1/2−5P3/2 transitions of a V-type electromagnetically induced transparency (EIT) configuration, respectively. A clear spatial intensity distribution of the probe laser with distinguished third-order diffraction pattern is recorded to character the EIG. The influence of the pertinent experimental parameters, such as coupling laser intensity and two-photon detuning on the diffraction pattern is investigated in detail. This is the first observation in visual form of the EIG in cold rubidium atoms. These results may potentially provide a nondestructive method to image cold atoms and pave the way for investigating non-Hermitian physics and the control of light dynamics.

scholarly journals Determine Dispersion Coefficient of 85Rb Atom in the Y–Configuration

2019 ◽  
Vol 35 (2) ◽  
Author(s):  
Nguyen Tien Dung
Keyword(s):  
Laser Beam ◽  
Dispersion Coefficient ◽  
Electromagnetically Induced Transparency ◽  
Laser Beams ◽  
Probe Laser ◽  
Frequency Detuning ◽  
Coupling Laser ◽  
85Rb Atom ◽  
Probe Laser Beam ◽  
Induced Transparency

Abstract: In this work, we derive analytical expression for the dispersion coefficient of 85Rb atom for a weak probe laser beam induced by a strong coupling laser beams. Our results show possible ways to control dispersion coefficient by frequency detuning and of the coupling lasers. The results show that a Y-configuration appears two transparent window of the dispersion coefficient for the probe laser beam. The depth and width or position of these windows can be altered by changing the intensity or frequency detuning of the coupling laser fields. Keywords: Electromagnetically induced transparency, dispersion coefficient.

Probing Bloch oscillations using a slow-light sensor

2020 ◽  
Vol 9 (5) ◽  
pp. 243-246
Author(s):  
Pei-Chen Kuan ◽  
Chang Huang ◽  
Shau-Yu Lan
Keyword(s):  
Phase Shift ◽  
Optical Lattice ◽  
Cold Atoms ◽  
Slow Light ◽  
Internal State ◽  
Electromagnetically Induced Transparency ◽  
Bloch Oscillations ◽  
Bloch Oscillation ◽  
Induced Transparency ◽  
Transparency Condition

AbstractWe implement slow-light under electromagnetically induced transparency condition to measure the motion of cold atoms in an optical lattice undergoing Bloch oscillation. The motion of atoms is mapped out through the phase shift of light without perturbing the external and internal state of the atoms. Our results can be used to construct a continuous motional sensor of cold atoms.

scholarly journals Optical Precursors with Electromagnetically Induced Transparency in Cold Atoms

2009 ◽  
Vol 103 (9) ◽  
Author(s):  
Dong Wei ◽  
J. F. Chen ◽  
M. M. T. Loy ◽  
G. K. L. Wong ◽  
Shengwang Du
Keyword(s):  
Cold Atoms ◽  
Electromagnetically Induced Transparency ◽  
Induced Transparency

scholarly journals Observation of multi-electromagnetically induced transparency in V-type rubidium atoms

2014 ◽  
Vol 61 (8) ◽  
pp. 631-635 ◽  
Author(s):  
Kang Ying ◽  
Yueping Niu ◽  
Dijun Chen ◽  
Haiwen Cai ◽  
Ronghui Qu ◽  
...  
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Rubidium Atoms ◽  
Induced Transparency

scholarly journals Optical Bistability in a Controllable Giant Self-Kerr Nonlinear Gaseous Medium under Electromagnetically Induced Transparency and Doppler Broadening

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Phuong Le Thi Minh ◽  
Doai Le Van ◽  
Khoa Dinh Xuan ◽  
Bang Nguyen Huy
Keyword(s):  
Optical Bistability ◽  
Gaseous Medium ◽  
Electromagnetically Induced Transparency ◽  
Ring Cavity ◽  
Kerr Nonlinearity ◽  
Weak Field ◽  
Probe Laser ◽  
Doppler Broadening ◽  
Probe Light ◽  
Induced Transparency

We study optical bistability (OB) in a controllable giant self-Kerr nonlinear atomic gaseous medium placed in a unidirectional ring cavity. The medium is coherently excited by strong controlling field and a weak probe laser field under electromagnetically induced transparency (EIT) and Doppler broadening. In a weak field limit of the probe light, an analytic OB equation for the probe light field is derived as an analytic function of parameters of the controlling field and temperature of the medium. It is shown that OB characters can be manipulated with the parameters due to the controllable properties of the self-Kerr nonlinearity. Furthermore, enhancement of the Kerr nonlinearity reduces the switching intensity threshold and width of the OB.

Electromagnetically induced transparency in an inverted-Ysystem of interacting cold atoms

2012 ◽  
Vol 86 (2) ◽  
Author(s):  
Dong Yan ◽  
Yi-Mou Liu ◽  
Qian-Qian Bao ◽  
Chang-Bao Fu ◽  
Jin-Hui Wu
Keyword(s):  
Cold Atoms ◽  
Electromagnetically Induced Transparency ◽  
Induced Transparency
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