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.

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 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.

Enhancement of the thermal lens signal induced by sample matrix absorption of the probe laser beam

2002 ◽  
Vol 41 (27) ◽  
pp. 5814 ◽  
Author(s):  
Victor I. Grishko ◽  
Chieu D. Tran ◽  
Walter W. Duley
Keyword(s):  
Laser Beam ◽  
Thermal Lens ◽  
Probe Laser ◽  
Sample Matrix ◽  
Probe Laser Beam ◽  
Thermal Lens Signal

Effects of laser beam diameter on electromagnetically induced transparency due to Zeeman coherences in Rb vapor

2013 ◽  
Vol T157 ◽  
pp. 014019
Author(s):  
S N Nikolić ◽  
A J Krmpot ◽  
N M Lučić ◽  
B V Zlatković ◽  
M Radonjić ◽  
...  
Keyword(s):  
Laser Beam ◽  
Electromagnetically Induced Transparency ◽  
Beam Diameter ◽  
Laser Beam Diameter ◽  
Rb Vapor ◽  
Induced Transparency

scholarly journals Electromagnetically induced transparency with Rydberg atoms across the Breit-Rabi regime

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Julian Naber ◽  
Atreju Tauschinsky ◽  
Ben van Linden van den Heuvell ◽  
Robert Spreeuw
Keyword(s):  
Magnetic Fields ◽  
Electromagnetically Induced Transparency ◽  
Level Structure ◽  
Laser Beams ◽  
Optical Bloch Equations ◽  
Angular Momenta ◽  
Low Field ◽  
Multi Level ◽  
Atomic States ◽  
Induced Transparency

We present experimental results on the influence of magnetic fields and laser polarization on electromagnetically induced transparency (EIT) using Rydberg levels of ^{87}87Rb atoms. The measurements are performed in a room temperature vapor cell with two counter-propagating laser beams at 480 m and 780 m in a ladder-type energy level scheme. We measure the EIT spectrum of a range of ns_{1/2}ns1/2 Rydberg states for n=19-27n=19−27, where the hyperfine structure can still be resolved. Our measurements span the range of magnetic fields from the low field linear Zeeman regime to the high field Paschen-Back regimes. The observed spectra are very sensitive to small changes in magnetic fields and the polarization of the laser beams. We model our observations using optical Bloch equations that take into account the full multi-level structure of the atomic states involved and the decoupling of the electronic JJ and nuclear II angular momenta in the Breit-Rabi regime. The numerical model yields excellent agreement with the observations. In addition to EIT related experiments, our results are relevant for experiments involving coherent excitation to Rydberg levels in the presence of magnetic fields.

Spatial Mapping of Transient Atomic Concentrations Using Acousto-Optic Deflection

1986 ◽  
Vol 40 (6) ◽  
pp. 863-868 ◽  
Author(s):  
Carmen W. Huie ◽  
Edward S. Yeung
Keyword(s):  
Laser Beam ◽  
Sodium Tungstate ◽  
Imaging System ◽  
Region Of Interest ◽  
One Dimension ◽  
Probe Laser ◽  
Spatial Mapping ◽  
Spatial Region ◽  
Probe Laser Beam ◽  
Transient Events

We report a new imaging system for obtaining spatially and temporally resolved atomic absorption profiles for transient events. This is based on an aconsto-optic beam deflector that scans the probe laser beam in one dimension repeatedly across the spatial region of interest. Scan rates of 10 µs durations essentially freeze the absorbing species in time to allow a spatial resolution of 0.06 cm over a 1.2 cm length. With the use of 2K of buffer memory and a digitization interval of 200 ns (12 bits), the time evolution can be followed up to a total of 400 µs. The capabilities are demonstrated in the study of atom formation in a laser-generated plume from a sodium tungstate surface.

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