Characterization of terahertz field confinement at the end of a tapered metal wire waveguide

被引：51

作者：

Astley, Victoria ^{[1
]}

Mendis, Rajind ^{[1
]}

Mittleman, Daniel M. ^{[1
]}

机构：

[1] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77251 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 03期

基金：

美国国家科学基金会;

关键词：

optical waveguides; surface plasmons; terahertz wave devices; NEAR-FIELD; MICROSCOPY; RADIATION; TRANSPORT; TIP;

D O I：

10.1063/1.3186065

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present experimental verification of the possibility of strong subwavelength confinement of the terahertz electric field at the end of a tapered metal wire waveguide. The axial field component at the end of the tapered waveguide shows a lateral confinement that is an order of magnitude greater than an untapered waveguide, and over 100 times greater than the free-space wavelength. The axial component is also strongly confined in the propagation direction, in contrast to the radial field component. Comparison to numerical simulation yields excellent agreement when the effect of the detecting probe is included in the analysis.

引用

页数：3

共 27 条

[1] Measurement and calculation of the near field of a terahertz apertureless scanning optical microscope [J].

Adam, Aurele J. L. ;

van der Valk, Nick C. J. ;

Planken, Paul C. M. .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2007, 24 (05) :1080-1090

[2] A study of background signals in terahertz apertureless near-field microscopy and their use for scattering-probe imaging [J].

Astley, Victoria ;

Zhan, Hui ;

Mendis, Rajind ;

Mittleman, Daniel M. .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (11)

[3] Tapered Sommerfeld wire terahertz near-field imaging [J].

Awad, M. ;

Nagel, M. ;

Kurz, H. .

APPLIED PHYSICS LETTERS, 2009, 94 (05)

[4]

Cory H, 1998, MICROW OPT TECHN LET, V18, P120, DOI 10.1002/(SICI)1098-2760(19980605)18:2<120::AID-MOP10>3.0.CO

[5]

2-B

[6] Enhanced coupling of terahertz radiation to cylindrical wire waveguides [J].

Deibel, JA ;

Wang, KL ;

Escarra, MD ;

Mittleman, DM .

OPTICS EXPRESS, 2006, 14 (01) :279-290

[7] Frequency-dependent radiation patterns emitted by THz plasmons on finite length cylindrical metal wires [J].

Deibel, Jason A. ;

Berndsen, Nicholas ;

Wang, Kanglin ;

Mittleman, Daniel M. ;

van der Valk, Nick C. J. ;

Planken, Paul C. M. .

OPTICS EXPRESS, 2006, 14 (19) :8772-8778

[8] Electric near-field enhancement of a sharp semi-infinite conical probe: Material and cone angle dependence [J].

Goncharenko, Anatoliy V. ;

Wang, Juen-Kai ;

Chang, Yia-Chung .

PHYSICAL REVIEW B, 2006, 74 (23)

[9] Terahertz Near-Field Nanoscopy of Mobile Carriers in Single Semiconductor Nanodevices [J].

Huber, A. J. ;

Keilmann, F. ;

Wittborn, J. ;

Aizpurua, J. ;

Hillenbrand, R. .

NANO LETTERS, 2008, 8 (11) :3766-3770

[10] Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip [J].

Janunts, NA ;

Baghdasaryan, KS ;

Nerkararyan, KV ;

Hecht, B .

OPTICS COMMUNICATIONS, 2005, 253 (1-3) :118-124

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