Near-field visualization of focal depth modulation by step corrugated plasmonic slits

被引：30

作者：

Jia, Baohua ^{[1
,2
]}

Shi, Haofei ^{[3
]}

Li, Jiafang ^{[1
,2
]}

Fu, Yongqi ^{[4
]}

Du, Chunlei ^{[3
]}

Gu, Min ^{[1
,2
]}

机构：

[1] Swinburne Univ Technol, Fac Engn & Ind Sci, Ctr Microphoton, Hawthorn, Vic 3122, Australia

[2] Swinburne Univ Technol, Fac Engn & Ind Sci, CUDOS, Hawthorn, Vic 3122, Australia

[3] Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Sichuan Prov, Peoples R China

[4] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Sichuan Prov, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 15期

关键词：

integrated optics; lenses; light propagation; optical design techniques; optical fabrication; optical focusing; optical modulation; plasmonics; TRANSMISSION; LIGHT; ARRAYS; FILMS;

D O I：

10.1063/1.3120542

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanometric plasmonic slits with stepped corrugations have been designed and fabricated to achieve plasmonic focusing and focal depth modulation. A scanning near-field optical microscope is employed to directly visualize the transmitted light from the slits. The near-field and far-field two-dimensional images taken at different planes parallel to the slit surface unambiguously demonstrated the focusing effect of the nanoslits. Furthermore, by forming stepped corrugations with either a concave or a convex profile on both sides of the slits, the phase of the transmitted beam can be effectively manipulated, thus allowing an accurate tuning of the focal depth.

引用

页数：3

共 19 条

[1] Plasmon-assisted transmission of entangled photons [J].

Altewischer, E ;

van Exter, MP ;

Woerdman, JP .

NATURE, 2002, 418 (6895) :304-306

[2] Surface plasmon subwavelength optics [J].

Barnes, WL ;

Dereux, A ;

Ebbesen, TW .

NATURE, 2003, 424 (6950) :824-830

[3] Channel plasmon subwavelength waveguide components including interferometers and ring resonators [J].

Bozhevolnyi, SI ;

Volkov, VS ;

Devaux, E ;

Laluet, JY ;

Ebbesen, TW .

NATURE, 2006, 440 (7083) :508-511

[4] Extraordinary optical transmission through sub-wavelength hole arrays [J].

Ebbesen, TW ;

Lezec, HJ ;

Ghaemi, HF ;

Thio, T ;

Wolff, PA .

NATURE, 1998, 391 (6668) :667-669

[5] Geometrical characterization issues of plasmonic nanostructures with depth-tuned grooves for beam shaping [J].

Fu, Yongqi ;

Zhou, Wei ;

Lim, Lennie E. N. ;

Du, Chunlei ;

Luo, Xiangang ;

Zhao, Zeyu ;

Dong, Xiaochun ;

Shi, Haofei ;

Wang, ChangTao .

OPTICAL ENGINEERING, 2006, 45 (10)

[6] Direct evidence for surface plasmon-mediated enhanced light transmission through metallic nanohole arrays [J].

Gao, Hanwei ;

Henzie, Joel ;

Odom, Teri W. .

NANO LETTERS, 2006, 6 (09) :2104-2108

[7] Focusing light with a single subwavelength aperture flanked by surface corrugations [J].

García-Vidal, FJ ;

Martín-Moreno, L ;

Lezec, HJ ;

Ebbesen, TW .

APPLIED PHYSICS LETTERS, 2003, 83 (22) :4500-4502

[8] Local observation of modes from three-dimensional woodpile photonic crystals with near-field microspectroscopy under supercontinuum illumination [J].

Jia, Baohua ;

Norton, Andrew H. ;

Li, Jiafang ;

Rahmani, Adel ;

Asatryan, Ara A. ;

Botten, Lindsay C. ;

Gu, Min .

OPTICS LETTERS, 2008, 33 (10) :1093-1095

[9] Direct observation of a pure focused evanescent field of a high numerical aperture objective lens by scanning near-field optical microscopy [J].

Jia, BH ;

Gan, XS ;

Gu, M .

APPLIED PHYSICS LETTERS, 2005, 86 (13) :1-3

[10] Tuning the focus of a plasmonic lens by the incident angle [J].

Liu, ZW ;

Steele, JM ;

Lee, H ;

Zhang, X .

APPLIED PHYSICS LETTERS, 2006, 88 (17)

← 1 2 →