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

The European Physical Journal D

A controllable double-well optical trap for cold atoms (or molecules) using a binary π-phase plate: experimental demonstration and Monte Carlo simulation

Renwang Mu, Z. L. Wang, Y. L. Li, Xiaoting Ji, Jiaqi Yin

Published May 25, 2010• 7 citations
Publisher
DOI
10.1140/epjd/e2010-00148-x

Related papers

Double-Layer Optical-Trap Arrays for Trapping Cold Atoms or Molecules

沐仁旺 Mu Renwang, 纪宪明 Ji Xianming, 印建平 Yin Jianping

Acta Optica Sinica•Jan 1, 2009•0 citations

Generation of controllable double-well optical trap for cold atoms (molecules) and its experimental studies

Renwang Mu, Yali Li, Ji Xian-Ming +2 more

In this paper, an experimental scheme of a controllable double-well optical trap for cold atoms (molecules) is briefly introduced, and the fabrication method of a binary π-phase plate and the experimental results to generate a controllable double-well optical trap are reported. In the experiment, we investigated the dependence of the double-well parameters (such as the spatial position of optical double-well, the spacing between the centers of two wells and the relative intensity distributions and so on) on the phase errors of the π-phase plate, and the change of double-well intensities resulting from errors in the engraving depth of the binary π-phase plate as well as the evolution of the optical trap from two wells to single one are studied both theoretically and experimentally. Experimental results consistent with theoretical prediction are obtained.

Acta Physica Sinica•Jan 1, 2006•7 citations

A Novel Controllable Six-Well Optical Trap for Cold Atoms or Molecules and Optical lattice

陆俊发 Lu Junfa, 陆荷琴 Lu Heqin, 周琦 Zhou Qi +1 more

Acta Optica Sinica•Jan 1, 2008•0 citations

A Novel Controllable Four-Well Optical Trap for Cold Atoms or Molecules and Its Two-Dimensional Optical Lattices

陆俊发 Lu Junfa, 纪宪明 Ji Xianming, 周琦 Zhou Qi +1 more

Acta Optica Sinica•Jan 1, 2008•0 citations

A controllable longitudinal double-well optical dipole trap for cold atoms (or cold molecules)

Renwang Mu, Ji Xian-Ming, Yin Jian-Ping +1 more

In this paper, we propose a novel scheme to produce a longitudinal controllable double-well optical dipole trap for cold atoms (or cold molecules), which is composed of a binary π-phase plate and a lens. The π-phase plate consists of two homocentric rings with equal area and opposite phase (0 and π), and its central region is opaque. When a plane light wave passes through the above optical system, a double-well optical trap will be formed at two sides of the focal point along the optical axis. The outer radius of the binary π-phase plate can be controlled by adjusting the radius of a diaphragm, so that a double-well optical trap will evolve and finally combined into a single-well, or vice versa. We briefly introduce the basic principle and derive several optimal parameters of the trap, and show the dependence of the optical parameters (including intensity distributions) on the geometrical parameters of the system. Our study shows that the proposed controllable optical trap can be used not only to trap cold atoms (or cold molecules) and realize all-optical, double-well or two species Bose-Einstein condensation (BEC), but also to study the trapped-atom (-molecule) interference, or form a 2D array of double-layer optical traps for cold atoms (or molecules), even to prepare a novel 2D optical lattice, and so on.

Acta Physica Sinica•Jan 1, 2006•2 citations

Controllable double-well optical trap for cold atoms or molecules and its one-dimensional and two-dimensional optical lattices

Ji Xian-Ming, Jianping Yin

We propose a novel, to our knowledge, scheme to form a controllable double-well optical dipole trap for cold atoms (or molecules) by using an optical system composed of a binary pi-phase plate and a lens illuminated by a plane light wave. We calculate the intensity distribution of the double-well trap and derive the analytical relationships between the characteristic parameters of the double-well trap (including geometric parameters, intensity distributions, and intensity gradients and their curvatures) and the relative aperture beta of the lens system. We also extend our controllable double-well trap to its trap array by using a binary pi-phase grating combined with an array of spherical microlenses. Our study shows that, if the pi-phase plate (or the pi-phase grating) is moved along the x direction, our double-well trap (or array of double-well ones) can continuously evolve to a single-well one (or an array of single-well ones) and vice versa, which can be used to study cold collisions between two atomic (or molecular) samples and atom interference with Bose-Einstein condensation (BEC) in a double-well potential; to prepare quantum entanglement between two macroscopic atomic assembles, even to realize an all-optical double-well atomic (molecular) BEC (including an array of all-optical double-well BECs) by using optical-potential evaporative cooling; to form a novel optical lattice with a larger lattice constant; and so on.

Journal of the Optical Society of America B•Aug 1, 2005•12 citations
In this paper, an experimental scheme of a controllable double-well optical trap for cold atoms (molecules) is briefly introduced, and the fabrication method of a binary π-phase plate and the experimental results to generate a controllable double-well optical trap are reported. In the experiment, we investigated the dependence of the double-well parameters (such as the spatial position of optical double-well, the spacing between the centers of two wells and the relative intensity distributions and so on) on the phase errors of the π-phase plate, and the change of double-well intensities resulting from errors in the engraving depth of the binary π-phase plate as well as the evolution of the optical trap from two wells to single one are studied both theoretically and experimentally. Experimental results consistent with theoretical prediction are obtained.
In this paper, we propose a novel scheme to produce a longitudinal controllable double-well optical dipole trap for cold atoms (or cold molecules), which is composed of a binary π-phase plate and a lens. The π-phase plate consists of two homocentric rings with equal area and opposite phase (0 and π), and its central region is opaque. When a plane light wave passes through the above optical system, a double-well optical trap will be formed at two sides of the focal point along the optical axis. The outer radius of the binary π-phase plate can be controlled by adjusting the radius of a diaphragm, so that a double-well optical trap will evolve and finally combined into a single-well, or vice versa. We briefly introduce the basic principle and derive several optimal parameters of the trap, and show the dependence of the optical parameters (including intensity distributions) on the geometrical parameters of the system. Our study shows that the proposed controllable optical trap can be used not only to trap cold atoms (or cold molecules) and realize all-optical, double-well or two species Bose-Einstein condensation (BEC), but also to study the trapped-atom (-molecule) interference, or form a 2D array of double-layer optical traps for cold atoms (or molecules), even to prepare a novel 2D optical lattice, and so on.
We propose a novel, to our knowledge, scheme to form a controllable double-well optical dipole trap for cold atoms (or molecules) by using an optical system composed of a binary pi-phase plate and a lens illuminated by a plane light wave. We calculate the intensity distribution of the double-well trap and derive the analytical relationships between the characteristic parameters of the double-well trap (including geometric parameters, intensity distributions, and intensity gradients and their curvatures) and the relative aperture beta of the lens system. We also extend our controllable double-well trap to its trap array by using a binary pi-phase grating combined with an array of spherical microlenses. Our study shows that, if the pi-phase plate (or the pi-phase grating) is moved along the x direction, our double-well trap (or array of double-well ones) can continuously evolve to a single-well one (or an array of single-well ones) and vice versa, which can be used to study cold collisions between two atomic (or molecular) samples and atom interference with Bose-Einstein condensation (BEC) in a double-well potential; to prepare quantum entanglement between two macroscopic atomic assembles, even to realize an all-optical double-well atomic (molecular) BEC (including an array of all-optical double-well BECs) by using optical-potential evaporative cooling; to form a novel optical lattice with a larger lattice constant; and so on.