Trapping Microparticles in a Structured Dark Focus

被引：5
作者：
Almeida, F. [1 ]
Sousa, I. [1 ]
Kremer, O. [2 ]
da Silva, B. Pinheiro [3 ]
Tasca, D. S. [3 ]
Khoury, A. Z. [3 ]
Temporao, G. [2 ]
Guerreiro, T. [1 ]
机构：
[1] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22451900 Rio De Janeiro, RJ, Brazil
[2] Pontificia Univ Catolica Rio de Janeiro, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro, RJ, Brazil
[3] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil
来源：
PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 16期
基金：
巴西圣保罗研究基金会;
关键词：
OPTICAL TWEEZERS; ANGULAR-MOMENTUM; BOTTLE; BEAM; PARTICLES; GENERATION; ATOM;
D O I：
10.1103/PhysRevLett.131.163601
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all directions-the dark focus tweezer. Results from power spectrum and potential analysis demonstrate the nonharmonicity of the trapping potential landscape, which is reconstructed from experimental data in agreement to Lorentz-Mie numerical simulations. Applications of the dark tweezer in levitated optomechanics and biophysics are discussed.
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页数：6
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