Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

APS

Polarization Dependence of Optical Suppression in Ultracold Photoassociative Ionization Collisions

J. Weiner, Reginaldo de Jesus Napolitano, Vanderlei Salvador Bagnato, R. J. Horowicz, Luís Gustavo Marcassa, Sérgio Ricardo Muniz, Sérgio Carlos Zílio, Paul S. Julienne

Published May 1, 1996• 0 citations
OpenAlex

Related papers

Structure in the angular dependence of optical suppression of photoassociative ionization collisions within an optically cooled and collimated sodium atom beam

W. DeGraffenreid, Jaime Ramirez-Serrano, Y.-M. Liu +3 more

Applied Physics B•Dec 1, 2000•3 citations

Long-range Molecular States and Ultracold Photoassociative Ionization Collisions

Vanderlei Salvador Bagnato, J. Weiner, Paul S. Julienne +1 more

Laser Physics•Jan 1, 1994•2 citations

Polarization dependence of optical suppression in ultracold photoassociative ionization of sodium atoms

Vanderlei Salvador Bagnato, Luís Gustavo Marcassa, Sérgio Carlos Zílio +5 more

Summary form only given. Collisions with cooled and trapped atoms have been the subject of intense investigation during the past years. Unprecedented details of the intermediate steps in the collision have been revealed. A remarkable feature in the ultracold system is the ability to control entrance-channel scattering flux and thereby control the exit channel of the collisional encounter. Here we present the continuation of our recent work where photoassociative ionizations (PAI) of sodium atoms were suppressed by application of an optical field. The new experiments show that suppression of almost 100% is possible when high intensity is used and a remarkable dependence with the polarization of the suppressor laser field is observed and calculated. This result shows a deviation from the simple picture based on the Landau-Zener avoided crossing model when high intensity is used.

Quantum Electronics and Laser Science Conference•Jun 7, 1996•0 citations

Polarization Dependence of Optical Suppression in Photoassociative Ionization Collisions in a Sodium Magneto-optic Trap

Sérgio Carlos Zílio, Luís Gustavo Marcassa, Sérgio Ricardo Muniz +5 more

Three-dimensional quantum scattering calculations predict that the degree of optical shielding of cold collisions saturates with increasing intensity very differently from two-state models and is sensitive to the polarization of the shielding light. We report measurements showing how suppression of Na photoassociative ionization (PAI) rates is sensitive to the intensity and polarization of the shielding laser. At higher intensities, circular polarization suppresses PAI rates an order of magnitude more effectively than linear polarization, in qualitative agreement with our model calculations.

Physical Review Letters•Mar 18, 1996•42 citations

Experimental investigation of optical suppression in cold collisions

Luís Gustavo Marcassa, R. J. Horowicz, Simone Dal Zilio +2 more

Quantum Electronics and Laser Science Conference•May 22, 1995•0 citations

Cooperative Effects In Laser-induced Ultracold Collisions

S. D. Gensemer, V. Sánchez-Villicaña, S. Ciris +1 more

Quantum Electronics and Laser Science Conference•May 18, 1997•0 citations
Summary form only given. Collisions with cooled and trapped atoms have been the subject of intense investigation during the past years. Unprecedented details of the intermediate steps in the collision have been revealed. A remarkable feature in the ultracold system is the ability to control entrance-channel scattering flux and thereby control the exit channel of the collisional encounter. Here we present the continuation of our recent work where photoassociative ionizations (PAI) of sodium atoms were suppressed by application of an optical field. The new experiments show that suppression of almost 100% is possible when high intensity is used and a remarkable dependence with the polarization of the suppressor laser field is observed and calculated. This result shows a deviation from the simple picture based on the Landau-Zener avoided crossing model when high intensity is used.
Three-dimensional quantum scattering calculations predict that the degree of optical shielding of cold collisions saturates with increasing intensity very differently from two-state models and is sensitive to the polarization of the shielding light. We report measurements showing how suppression of Na photoassociative ionization (PAI) rates is sensitive to the intensity and polarization of the shielding laser. At higher intensities, circular polarization suppresses PAI rates an order of magnitude more effectively than linear polarization, in qualitative agreement with our model calculations.