Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges

doi:10.1088/1674-1056/22/7/073701

中国物理B ›› 2013, Vol. 22 ›› Issue (7): 73701-073701.doi: 10.1088/1674-1056/22/7/073701

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges

王正岭^a, 唐伟民^a, 周明^{b c}, 高传玉^b

a Department of Physics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China;
b Center for Photon Manufacturing Science and Technology, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
c State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

收稿日期:2012-10-17 修回日期:2013-02-04 出版日期:2013-06-01 发布日期:2013-06-01
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2011CB013004), the National Natural Science Foundation of China (Grant No. 50975128), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2011462), and the Postdoctoral Science Foundation of China (Grant No. 20100481093).

Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges

Wang Zheng-Ling (王正岭)^a, Tang Wei-Min (唐伟民)^a, Zhou Ming (周明)^{b c}, Gao Chuan-Yu (高传玉)^b

a Department of Physics, Faculty of Science, Jiangsu University, Zhenjiang 212013, China;
b Center for Photon Manufacturing Science and Technology, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
c State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

Received:2012-10-17 Revised:2013-02-04 Online:2013-06-01 Published:2013-06-01
Contact: Wang Zheng-Ling E-mail:zlwang@ujs.edu.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2011CB013004), the National Natural Science Foundation of China (Grant No. 50975128), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2011462), and the Postdoctoral Science Foundation of China (Grant No. 20100481093).

摘要/Abstract

摘要： We propose a novel scheme to guide neutral cold atoms in a nanoscale region based on surface plasmons (SPs) of one pair and two pairs of tips of metallic wedges with locally enhanced light intensity and sub-optical wavelength resolution. We analyze the near-field intensity distribution of the tip of the metallic wedge by the FDTD method, and study the total intensity as well as the total potential of optical potentials and van der Waals potentials for ⁸⁷Rb atoms in the light field of one pair and two pairs of tips of metallic wedges. It shows that the total potentials of one pair and two pairs of tips of metallic wedges can generate a gravito-optical trap and a dark closed trap for nanoscale guiding of neutral cold atoms. Guided atoms can be cooled with efficient intensity-gradient Sisyphus cooling by blue-detuned light field. This provides an important step towards the generation of hybrid systems consisting of isolated atoms and solid devices.

关键词: nanoscale guiding, cold atoms, surface plasmons, metallic wedges

Abstract: We propose a novel scheme to guide neutral cold atoms in a nanoscale region based on surface plasmons (SPs) of one pair and two pairs of tips of metallic wedges with locally enhanced light intensity and sub-optical wavelength resolution. We analyze the near-field intensity distribution of the tip of the metallic wedge by the FDTD method, and study the total intensity as well as the total potential of optical potentials and van der Waals potentials for ⁸⁷Rb atoms in the light field of one pair and two pairs of tips of metallic wedges. It shows that the total potentials of one pair and two pairs of tips of metallic wedges can generate a gravito-optical trap and a dark closed trap for nanoscale guiding of neutral cold atoms. Guided atoms can be cooled with efficient intensity-gradient Sisyphus cooling by blue-detuned light field. This provides an important step towards the generation of hybrid systems consisting of isolated atoms and solid devices.

Key words: nanoscale guiding, cold atoms, surface plasmons, metallic wedges

中图分类号: (Atom traps and guides)

37.10.Gh

42.50.-p (Quantum optics) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)

王正岭, 唐伟民, 周明, 高传玉. Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges[J]. 中国物理B, 2013, 22(7): 73701-073701.

Wang Zheng-Ling (王正岭), Tang Wei-Min (唐伟民), Zhou Ming (周明), Gao Chuan-Yu (高传玉). Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges[J]. Chin. Phys. B, 2013, 22(7): 73701-073701.

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Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges

Nanoscale guiding for cold atoms based on surface plasmons alongtips of metallic wedges

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