Tunable and ultra-elongated photonic nanojet generated by a liquid-immersed core-shell dielectric microsphere

被引：39

作者：

Wu, Pinghui ^{[1
]}

Li, Jia ^{[2
]}

Wei, Kaihua ^{[3
]}

Yue, Wenjie ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Coll Opt Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Univ Miami, Dept Phys, Coll Arts & Sci, Coral Gables, FL 33146 USA

[3] Hangzhou Dianzi Univ, Coll Life Informat Sci & Instrument Engn, Hangzhou 310018, Zhejiang, Peoples R China

来源：

APPLIED PHYSICS EXPRESS | 2015年 / 8卷 / 11期

基金：

中国国家自然科学基金;

关键词：

NANOPARTICLES; LIGHT; BACKSCATTERING; NANOSCOPE;

D O I：

10.7567/APEX.8.112001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A three-dimensional (3D) photonic nanojet (PNJ) emerging from a liquid-immersed core-shell dielectric microsphere is numerically investigated by the finite-difference time-domain (FDTD) method. An ultra-elongated PNJ with an effective length larger than 57 wavelengths while retaining a high intensity and a large working distance is obtained from the simulation. In particular, PNJ properties, including intensity enhancement, working distance, effective length, and full width at half maximum (FWHM), can be well tuned and controlled by varying the refractive index of the immersed liquid. We believe that this design is applicable to many fields, such as material science, nanophotonics, and biomedicine. (C) 2015 The Japan Society of Applied Physics

引用

页数：3

共 16 条

[1] Photonic nanojet enhancement of backscattering of light by nanoparticles: a potential novel visible-light ultramicroscopy technique [J].

Chen, ZG ;

Taflove, A ;

Backman, V .

OPTICS EXPRESS, 2004, 12 (07) :1214-1220

[2] Optical forces on metallic nanoparticles induced by a photonic nanojet [J].

Cui, Xudong ;

Erni, Daniel ;

Hafner, Christian .

OPTICS EXPRESS, 2008, 16 (18) :13560-13568

[3] Size scaling of mesoporous silica membranes produced by nanosphere mediated laser ablation [J].

Grojo, D. ;

Boarino, L. ;

De Leo, N. ;

Rocci, R. ;

Panzarasa, G. ;

Delaporte, P. ;

Laus, M. ;

Sparnacci, K. .

NANOTECHNOLOGY, 2012, 23 (48)

[4] Super-long photonic nanojet generated from liquid-filled hollow microcylinder [J].

Gu, Guoqiang ;

Zhou, Rui ;

Chen, Zaichun ;

Xu, Huiying ;

Cai, Guoxiong ;

Cai, Zhiping ;

Hong, Minghui .

OPTICS LETTERS, 2015, 40 (04) :625-628

[5] Observation of nanojet-induced modes with small propagation losses in chains of coupled spherical cavities [J].

Kapitonov, A. M. ;

Astratov, V. N. .

OPTICS LETTERS, 2007, 32 (04) :409-411

[6] Quasi one-dimensional light beam generated by a graded-index microsphere [J].

Kong, Soon-Cheol ;

Taflove, Allen ;

Backman, Vadim .

OPTICS EXPRESS, 2009, 17 (05) :3722-3731

[7] Optical analysis of nanoparticles via enhanced backscattering facilitated by 3-D photonic nanojets [J].

Li, X ;

Chen, ZG ;

Taflove, A ;

Backman, V .

OPTICS EXPRESS, 2005, 13 (02) :526-533

[8] Subwavelength direct-write nanopatterning using optically trapped microspheres [J].

McLeod, Euan ;

Arnold, Craig B. .

NATURE NANOTECHNOLOGY, 2008, 3 (07) :413-417

[9] A hybridization model for the plasmon response of complex nanostructures [J].

Prodan, E ;

Radloff, C ;

Halas, NJ ;

Nordlander, P .

SCIENCE, 2003, 302 (5644) :419-422

[10] Detection of embedded ultra-subwavelength-thin dielectric features using elongated photonic nanojets [J].

Ruiz, Cesar Mendez ;

Simpson, Jamesina J. .

OPTICS EXPRESS, 2010, 18 (16) :16805-16812

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