Optofluidic Near-Field Optical Microscopy: Near-Field Mapping of a Silicon Nanocavity Using Trapped Microbeads

被引：19

作者：

Pin, Christophe ^{[1
,2
,3
,4
]}

Cluzel, Benoit ^{[1
]}

Renaut, Claude ^{[1
,2
,3
,4
]}

Picard, Emmanuel ^{[2
,3
]}

Peyrade, David ^{[4
]}

Hadji, Emmanuel ^{[2
,3
]}

de Fornel, Frederique ^{[1
]}

机构：

[1] Univ Bourgogne Franche Comte, Lab Interdisciplinaire Carnot Bourgogne, Grp Opt Champ Proche LRC SiNOPTIQ CEA DSM 08 36, UMR CNRS 6303, F-21078 Dijon, France

[2] Univ Grenoble Alpes, INAC SINAPS SP2M, F-38000 Grenoble, France

[3] CEA, INAC SINAPS SP2M, F-38000 Grenoble, France

[4] Univ Grenoble Alpes, CNRS, CEA Leti Minatec, LTM, F-38054 Grenoble, France

来源：

ACS PHOTONICS | 2015年 / 2卷 / 10期

关键词：

photonic crystal; optical tweezers; near-field optical forces; photonic force microscopy; optical lattice; near-field optical microscopy; PHOTONIC CRYSTAL; WAVE-GUIDE; PLASMONIC NANOTWEEZERS; STANDING-WAVE; TWEEZERS; MANIPULATION; PARTICLES; NANOPARTICLE; ARRAYS; CAVITY;

D O I：

10.1021/acsphotonics.5b00353

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

By analyzing the thermal motion of fluorescent dielectric microbeads trapped in the near-field of a silicon nanocavity, we investigate the influence of the bead's size and the trapping laser power on the shape of the optical trap and the "effective" trap stiffness. We demonstrate that the trapping potential is proportional to the subwavelength patterns of the electromagnetic near-field intensity distribution for unexpectedly large Mie particle sizes. More especially, we show that mapping the trapping potential experienced by a 500 nm diameter bead reveals the nanopattems of the cavity resonant mode. This result highlights how photonic force microscopy in nanotweezers can provide an elegant way to image evanescent fields at the nanoscale via the thermal motion of optically trapped fluorescent microprobes.

引用

页码：1410 / 1415

页数：6

共 53 条

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