Enhance transmission through a subwavelength slit on a bending metal substrate

C. M. Wang; C. L. Hsu; J. Y. Chang; C. C. Lee

doi:10.1117/12.616117

Enhance transmission through a subwavelength slit on a bending metal substrate

C. M. Wang, C. L. Hsu, J. Y. Chang, C. C. Lee

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

The optical transmission and distribution through a subwavelength slit on a tapered metallic substrate was investigated. By using a 45° tapered structure, 6 times larger transmission enhancement was achieved compared with a traditional metallic plate structure because of the asymmetric excited surface waves and the matching of propagation constants between the surface waves and slit waveguide. In addition, a focus beam was obtained by patterning surface corrugations in the exit plane. By tuning the period of the surface corrugations, we were able to adjust the focal length with a spot size smaller than the diffraction limit. The focal point can be kept about 0.6μm with a focal length from 0.5μm to 2.5μm for a grating period from 0.5μm to 0.6μm.

Original language	English
Article number	59270V
Pages (from-to)	1-8
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5927
DOIs	https://doi.org/10.1117/12.616117
State	Published - 2005
Event	Plasmonics: Metallic Nanostructures and Their Optical Properties III - San Diego, CA, United States Duration: 31 Jul 2005 → 3 Aug 2005

Keywords

Nano optics
Subwavelength aperture

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10.1117/12.616117

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title = "Enhance transmission through a subwavelength slit on a bending metal substrate",

abstract = "The optical transmission and distribution through a subwavelength slit on a tapered metallic substrate was investigated. By using a 45° tapered structure, 6 times larger transmission enhancement was achieved compared with a traditional metallic plate structure because of the asymmetric excited surface waves and the matching of propagation constants between the surface waves and slit waveguide. In addition, a focus beam was obtained by patterning surface corrugations in the exit plane. By tuning the period of the surface corrugations, we were able to adjust the focal length with a spot size smaller than the diffraction limit. The focal point can be kept about 0.6μm with a focal length from 0.5μm to 2.5μm for a grating period from 0.5μm to 0.6μm.",

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TY - JOUR

T1 - Enhance transmission through a subwavelength slit on a bending metal substrate

AU - Wang, C. M.

AU - Hsu, C. L.

AU - Chang, J. Y.

AU - Lee, C. C.

PY - 2005

Y1 - 2005

N2 - The optical transmission and distribution through a subwavelength slit on a tapered metallic substrate was investigated. By using a 45° tapered structure, 6 times larger transmission enhancement was achieved compared with a traditional metallic plate structure because of the asymmetric excited surface waves and the matching of propagation constants between the surface waves and slit waveguide. In addition, a focus beam was obtained by patterning surface corrugations in the exit plane. By tuning the period of the surface corrugations, we were able to adjust the focal length with a spot size smaller than the diffraction limit. The focal point can be kept about 0.6μm with a focal length from 0.5μm to 2.5μm for a grating period from 0.5μm to 0.6μm.

AB - The optical transmission and distribution through a subwavelength slit on a tapered metallic substrate was investigated. By using a 45° tapered structure, 6 times larger transmission enhancement was achieved compared with a traditional metallic plate structure because of the asymmetric excited surface waves and the matching of propagation constants between the surface waves and slit waveguide. In addition, a focus beam was obtained by patterning surface corrugations in the exit plane. By tuning the period of the surface corrugations, we were able to adjust the focal length with a spot size smaller than the diffraction limit. The focal point can be kept about 0.6μm with a focal length from 0.5μm to 2.5μm for a grating period from 0.5μm to 0.6μm.

KW - Nano optics

KW - Subwavelength aperture

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U2 - 10.1117/12.616117

DO - 10.1117/12.616117

M3 - 會議論文

AN - SCOPUS:31844456861

SN - 0277-786X

VL - 5927

SP - 1

EP - 8

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 59270V

T2 - Plasmonics: Metallic Nanostructures and Their Optical Properties III

Y2 - 31 July 2005 through 3 August 2005

ER -

Enhance transmission through a subwavelength slit on a bending metal substrate

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Keywords

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