Two types of highly efficient electrostatic traps for single loading or multi-loading of polar molecules

doi:10.1088/1674-1056/ab7905

Abstract Two novel electrostatic traps named octopole-based disk electrostatic trap (ODET) and tubular-based disk electrostatic trap (TDET) are proposed for trapping cold polar molecules in low-field-seeking states. Using MgF as the target molecule, single loading and multi-loading methods are numerically simulated with varied incident velocities of slow molecular beams in the two types of traps, respectively. In ODET, with an incident velocity of 10 m/s, a highest loading efficiency of 78.4% or 99.9% has been achieved under the single loading or multi-loading operation mode. In TDET, with an incident velocity of 11 m/s, a highest loading efficiency of 81.6% or 106.5% has been achieved using the two loading methods, respectively. With such high loading efficiencies, the trapped cold molecules can be applied in the researches of cold collisions, high precision spectroscopy, and precision measurements. Especially, together with a blue-detuned hollow beam, the new electrostatic traps proposed here offer a new platform for the following gradient-intensity cooling of MgF molecules, which may provide a new way to produce high density ultracold molecules.

Keywords: cold molecules electrostatic trapping Monte Carlo simulations

Received: 16 December 2019
Revised: 21 February 2020
Accepted manuscript online:

PACS:	37.10.Pq	(Trapping of molecules)
	32.60.+i	(Zeeman and Stark effects)
	37.10.Mn	(Slowing and cooling of molecules)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11834003, 91536218, 11034002, 11274114, 11504112, and 11874151), the National Key Basic Research and Development Program of China (Grant No. 2011CB921602), the Fundamental Research Funds for the Central Universities, China, Shanghai Pujiang Talents Plan, China (Grant No. 18PJ1403100), and Exploration Funds from the Shanghai Natural Science Foundation, China (Grant No. 18ZR1412700).

Corresponding Authors: Shunyong Hou, Jianping Yin
E-mail: syhou@lps.ecnu.edu.cn;jpyin@phy.ecnu.edu.cn

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Bin Wei(魏斌), Hengjiao Guo(郭恒娇), Yabing Ji(纪亚兵), Shunyong Hou(侯顺永), Jianping Yin(印建平) Two types of highly efficient electrostatic traps for single loading or multi-loading of polar molecules 2020 Chin. Phys. B 29 043701

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Two types of highly efficient electrostatic traps for single loading or multi-loading of polar molecules

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