Gradient force pattern, focal shift, and focal switch in an apodized optical system

被引：21

作者：

Gao, XM ^{[1
]}

Zhou, F ^{[1
]}

Xu, WD ^{[1
]}

Gan, FX ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

来源：

OPTIK | 2005年 / 116卷 / 03期

基金：

中国国家自然科学基金;

关键词：

optical trap; focal shift; focal switch; focal split;

D O I：

10.1016/j.ijleo.2004.12.010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, the evolution of the gradient force pattern, focal shift, and focal switch induced by a three-portion pure phase-shifting apodizer is numerically investigated in detail. The results show that the proposed apodizer may induce tunable gradient force on the particles in the focal region, focal shift, and focal switch. By adjusting the geometrical parameters of the phase-shifting apodizer, multiple traps may occur with changeable distance between them, and the shape of the optical trap also evolves evidently. More interestingly, for certain geometrical parameters of the proposed apodizer, by changing the phase shift of inner annular portion, the considerable focal shift may occur with focal switch accompanying, which is discussed to show that this kind of apodizer may be a very promising method of transporting trapped particles. © 2005 Elsevier GmbH. All rights reserved.

引用

页码：99 / 106

页数：8

共 37 条

[1] OBSERVATION OF A SINGLE-BEAM GRADIENT FORCE OPTICAL TRAP FOR DIELECTRIC PARTICLES [J].

ASHKIN, A ;

DZIEDZIC, JM ;

BJORKHOLM, JE ;

CHU, S .

OPTICS LETTERS, 1986, 11 (05) :288-290

[2] ACCELERATION AND TRAPPING OF PARTICLES BY RADIATION PRESSURE [J].

ASHKIN, A .

PHYSICAL REVIEW LETTERS, 1970, 24 (04) :156-&

[3] OPTICAL MATTER - CRYSTALLIZATION AND BINDING IN INTENSE OPTICAL-FIELDS [J].

BURNS, MM ;

FOURNIER, JM ;

GOLOVCHENKO, JA .

SCIENCE, 1990, 249 (4970) :749-754

[4] Possibility of an optical focal shift with polarization masks [J].

Chowdhury, DR ;

Bhattacharya, K ;

Chakroborty, AK ;

Ghosh, R .

APPLIED OPTICS, 2003, 42 (19) :3819-3826

[5] Dynamic holographic optical tweezers [J].

Curtis, JE ;

Koss, BA ;

Grier, DG .

OPTICS COMMUNICATIONS, 2002, 207 (1-6) :169-175

[6] Dynamic array of dark optical traps [J].

Daria, VR ;

Rodrigo, PJ ;

Glückstad, J .

APPLIED PHYSICS LETTERS, 2004, 84 (03) :323-325

[7] Optical tweezer arrays and optical substrates created with diffractive optics [J].

Dufresne, ER ;

Grier, DG .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1998, 69 (05) :1974-1977

[8] Computer-generated holographic optical tweezer arrays [J].

Dufresne, ER ;

Spalding, GC ;

Dearing, MT ;

Sheets, SA ;

Grier, DG .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2001, 72 (03) :1810-1816

[9] Multiple-beam optical tweezers generated by the generalized phase-contrast method [J].

Eriksen, RL ;

Mogensen, PC ;

Glückstad, J .

OPTICS LETTERS, 2002, 27 (04) :267-269

[10] Optical alignment and spinning of laser-trapped microscopic particles [J].

Friese, MEJ ;

Nieminen, TA ;

Heckenberg, NR ;

Rubinsztein-Dunlop, H .

NATURE, 1998, 394 (6691) :348-350

← 1 2 3 4 →