Microscopic model of the THz field enhancement in a metal nanoslit

Andrey Novitsky; Maksim Zalkovskij; Radu Malureanu; Andrei Lavrinenko

doi:10.1016/j.optcom.2011.08.019

Microscopic model of the THz field enhancement in a metal nanoslit

Andrey Novitsky, Maksim Zalkovskij, Radu Malureanu, Andrei Lavrinenko

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Abstract

We discuss the strong THz-field enhancement effect in a metal slit of dozens of nanometers sizes reported recently. Proposed simple microscopic model considers electric charges induced at the edges of the slit by a polarized incident wave. These charges contribute then to the field in the slit. The model is capable of explaining peculiarities of the field enhancement phenomenon such as an inverse frequency dependence of the enhancement factor. It provides closed-form expressions for the enhancement factor and field mapping inside the slit having only one fitting parameter. The model predicts influence of the slit shape on the field enhancement.

Original language	English
Journal	Optics Communications
Volume	284
Issue number	23
Pages (from-to)	5495
ISSN	0030-4018
DOIs	https://doi.org/10.1016/j.optcom.2011.08.019
Publication status	Published - 2011

Keywords

THz radiation
Metallic nanoslit
Field enhancement

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title = "Microscopic model of the THz field enhancement in a metal nanoslit",

abstract = "We discuss the strong THz-field enhancement effect in a metal slit of dozens of nanometers sizes reported recently. Proposed simple microscopic model considers electric charges induced at the edges of the slit by a polarized incident wave. These charges contribute then to the field in the slit. The model is capable of explaining peculiarities of the field enhancement phenomenon such as an inverse frequency dependence of the enhancement factor. It provides closed-form expressions for the enhancement factor and field mapping inside the slit having only one fitting parameter. The model predicts influence of the slit shape on the field enhancement.",

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AU - Novitsky, Andrey

AU - Zalkovskij, Maksim

AU - Malureanu, Radu

AU - Lavrinenko, Andrei

PY - 2011

Y1 - 2011

N2 - We discuss the strong THz-field enhancement effect in a metal slit of dozens of nanometers sizes reported recently. Proposed simple microscopic model considers electric charges induced at the edges of the slit by a polarized incident wave. These charges contribute then to the field in the slit. The model is capable of explaining peculiarities of the field enhancement phenomenon such as an inverse frequency dependence of the enhancement factor. It provides closed-form expressions for the enhancement factor and field mapping inside the slit having only one fitting parameter. The model predicts influence of the slit shape on the field enhancement.

AB - We discuss the strong THz-field enhancement effect in a metal slit of dozens of nanometers sizes reported recently. Proposed simple microscopic model considers electric charges induced at the edges of the slit by a polarized incident wave. These charges contribute then to the field in the slit. The model is capable of explaining peculiarities of the field enhancement phenomenon such as an inverse frequency dependence of the enhancement factor. It provides closed-form expressions for the enhancement factor and field mapping inside the slit having only one fitting parameter. The model predicts influence of the slit shape on the field enhancement.

KW - THz radiation

KW - Metallic nanoslit

KW - Field enhancement

U2 - 10.1016/j.optcom.2011.08.019

DO - 10.1016/j.optcom.2011.08.019

M3 - Journal article

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VL - 284

SP - 5495

JO - Optics Communications

JF - Optics Communications

IS - 23

ER -

Microscopic model of the THz field enhancement in a metal nanoslit

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Keywords

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