Self-induced back-action optical trapping of dielectric nanoparticles

被引:474
作者
Juan, Mathieu L. [1 ]
Gordon, Reuven [1 ,2 ]
Pang, Yuanjie [2 ]
Eftekhari, Fatima [2 ]
Quidant, Romain [1 ,3 ]
机构
[1] ICFO, Barcelona 08860, Spain
[2] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8W 3P6, Canada
[3] ICREA, Barcelona 08010, Spain
基金
加拿大自然科学与工程研究理事会;
关键词
WHISPERING-GALLERY MODE; NEAR-FIELD; FORCE; PARTICLES; TWEEZERS; MANIPULATION; VIRUSES; LIGHT;
D O I
10.1038/NPHYS1422
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Optical trapping has widely affected both the physical and life sciences. Past approaches to optical trapping of nanoscale objects required large optical intensities, often above their damage threshold. To achieve more than an order of magnitude reduction in the local intensity required for optical trapping, we present a self-induced back-action (SIBA) optical trap, where the trapped object has an active role in enhancing the restoring force. We demonstrate experimentally trapping of a single 50 nm polystyrene sphere using a SIBA optical trap on the basis of the transmission resonance of a nanoaperture in a metal film. SIBA optical trapping shows a striking departure from previous approaches, which we quantify by comprehensive calculations. The SIBA optical trap enables new opportunities for non-invasive immobilization of a single nanoscale object, such as a virus or a quantum dot.
引用
收藏
页码:915 / 919
页数:5
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