Expanding the toolbox for nanoparticle trapping and spectroscopy with holographic optical tweezers

被引：19

作者：

Dienerowitz, M. ^{[1
]}

Gibson, G. ^{[1
]}

Dienerowitz, F. ^{[2
]}

Padgett, M. ^{[1
]}

机构：

[1] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland

[2] KIT, ITM, Inst Engn Mech, D-76131 Karlsruhe, Germany

来源：

JOURNAL OF OPTICS | 2012年 / 14卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

holographic optical tweezers; nanoparticle trapping and spectroscopy; darkfield imaging; video-based particle tracking; HIGH-SPEED CAMERA; METAL NANOPARTICLES; GOLD NANOPARTICLES; ABERRATION CORRECTION; STIFFNESS; POSITION; TRACKING; TIME;

D O I：

10.1088/2040-8978/14/4/045003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have developed a workstation based on holographic tweezers to optically trap, move and characterize metal nanoparticles. Our advanced darkfield imaging system allows us to simultaneously image and take spectra of single trapped metal nanoparticles. We take advantage of the beamshaping abilities of the spatial light modulator and correct for aberrations of the trapping optics. We monitor the improvement of the optical trap with video-based nanoparticle tracking. Furthermore we theoretically assess the capabilities and limitations of video-based tracking for nanoparticle position detection, in particular with respect to acquisition frequencies below the corner frequency.

引用

页数：6

共 25 条

[1] Power spectrum analysis for optical tweezers [J].