Research of laser cooling by the optical force between light field and the atoms

2019 ◽  
Vol 571 ◽  
pp. 229-234
Author(s):  
X.X. Zhang ◽  
Y.H. Ji ◽  
Z.L. Yan ◽  
H. Wang
Keyword(s):  
Laser Cooling ◽  
Light Field ◽  
Optical Force

scholarly journals A proposal to measure Belinfante’s curl of the spin optical force based on the Kerker conditions

2021 ◽  
Vol 136 (2) ◽  
Author(s):  
Manuel I. Marqués ◽  
Shulamit Edelstein ◽  
Pedro A. Serena
Keyword(s):  
Spin Density ◽  
Radiation Pressure ◽  
Light Field ◽  
Poynting Vector ◽  
High Refractive Index ◽  
Mechanical Action ◽  
Optical Force ◽  
Magnetic Response ◽  
Propagating Waves ◽  
Optical Configuration

AbstractThe linear momentum of electromagnetic radiation is proportional to the Poynting vector. However, when light interacts with a dipole, the radiation pressure generated is no longer proportional to the Poynting vector: the so-called Belinfante’s momentum or equivalently, the curl of the spin density of the light field, must be considered. In this paper, we propose an optical configuration, based on two evanescent counter-propagating waves, perpendicularly polarized, capable of detecting Belinfante’s mechanical action. The two beams interact with a high-refractive-index particle like silicon. The direction of the radiation pressure exerted on the particle, proportional only to the curl of the spin density, depends on the electric and magnetic response of the particle and changes sign at the radiation wavelengths corresponding with the Kerker conditions.

scholarly journals Laser Manipulation of Atoms and Atom Optics

1995 ◽  
Vol 48 (2) ◽  
pp. 267 ◽  
Author(s):  
Yu-Zhu Wang ◽  
Liang Liu
Keyword(s):  
Standing Wave ◽  
Laser Cooling ◽  
Atomic Beam ◽  
Basic Concept ◽  
Light Field ◽  
Atom Optics ◽  
Diffuse Light ◽  
Laser Manipulation ◽  
Doppler Cooling

In this paper experiments on laser cooling, collimation and manipulation of a sodium atomic beam, such as the transverse collimation and decollimation of an atomic beam by a standing wave or a misaligned standing wave, longitudinal cooling of an atomic beam by a diffuse light field, sub-Doppler cooling in a blue detuned standing wave, are reported. The basic concept on atom optics is developed. An experiment on a method for the injection of atoms into an atomic cavity is also discussed.

Laser Cooling Dynamics of Neutral Atoms in a Light Field with Nonuniform Polarization for Fixed Interaction Time

2011 ◽  
Vol 6 (1) ◽  
pp. 24-35
Author(s):  
Oleg N. Prudnikov
Keyword(s):  
Laser Cooling ◽  
Laser Field ◽  
Light Field ◽  
Optical Transition ◽  
Interaction Time ◽  
Optimal Parameters ◽  
Elliptical Polarization ◽  
Neutral Atoms ◽  
Light Waves ◽  
Counterpropagating Waves

Laser cooling dynamics of neutral atoms with a closed optical transition Jg → Je in light fields with nonuniform polarization formed by counterpropagating waves with linear, circular or elliptical polarization was considered. For the case of finite interaction time of atoms with light field both mechanisms of Doppler and Sub-Doppler laser cooling affected on atoms in ensemble having different velocities were taken into account. We get qualitative relations on a base of numerical analysis in a frame of quasiclassical treatment of laser cooling. These relations allow to define optimal parameters of cooling waves, i.e. polarization, detuning from atomic resonance and intensity of light waves for the most rapid and dip laser cooling from initially wide momentum distribution for finite interaction time of atoms with laser field

The Impact of Light Polarisation on Light Field of Scenes with Multiple Reflections

2020 ◽  
pp. 108-115 ◽  
Author(s):  
Vladimir P. Budak ◽  
Anton V. Grimaylo
Keyword(s):  
Mathematical Model ◽  
Light Field ◽  
Global Illumination ◽  
Multiple Reflections ◽  
Software Environment ◽  
The Monte Carlo Method ◽  
Mueller Matrices ◽  
Volume Integration ◽  
The Impact

The article describes the role of polarisation in calculation of multiple reflections. A mathematical model of multiple reflections based on the Stokes vector for beam description and Mueller matrices for description of surface properties is presented. On the basis of this model, the global illumination equation is generalised for the polarisation case and is resolved into volume integration. This allows us to obtain an expression for the Monte Carlo method local estimates and to use them for evaluation of light distribution in the scene with consideration of polarisation. The obtained mathematical model was implemented in the software environment using the example of a scene with its surfaces having both diffuse and regular components of reflection. The results presented in the article show that the calculation difference may reach 30 % when polarisation is taken into consideration as compared to standard modelling.

Reconstruction of Smoke based on Light Field Consistency

2016 ◽  
Vol 136 (12) ◽  
pp. 522-531
Author(s):  
Yuta Ideguchi ◽  
Yuki Uranishi ◽  
Shunsuke Yoshimoto ◽  
Yoshihiro Kuroda ◽  
Masataka Imura ◽  
...  
Keyword(s):  
Light Field
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