Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

Fabio A. Ferri; Victor A.G. Rivera; Sérgio P.A. Osorio; Otávio B. Silva; Antonio R. Zanatta; Ben Hur V. Borges; John Weiner; Euclydes Marega

doi:10.1364/AO.50.000G11

Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

Fabio A. Ferri, Victor A.G. Rivera, Sérgio P.A. Osorio, Otávio B. Silva, Antonio R. Zanatta, Ben Hur V. Borges, John Weiner, Euclydes Marega

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Silver and gold films with thicknesses in the range of 120-450nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488.0 nm (for Ag) and 632.8nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.

Original language	English
Pages (from-to)	G11-G16
Journal	Applied Optics
Volume	50
Issue number	31
DOIs	https://doi.org/10.1364/AO.50.000G11
State	Published - 1 Nov 2011

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title = "Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films",

abstract = "Silver and gold films with thicknesses in the range of 120-450nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488.0 nm (for Ag) and 632.8nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.",

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T1 - Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

AU - Ferri, Fabio A.

AU - Rivera, Victor A.G.

AU - Osorio, Sérgio P.A.

AU - Silva, Otávio B.

AU - Zanatta, Antonio R.

AU - Borges, Ben Hur V.

AU - Weiner, John

AU - Marega, Euclydes

PY - 2011/11/1

Y1 - 2011/11/1

N2 - Silver and gold films with thicknesses in the range of 120-450nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488.0 nm (for Ag) and 632.8nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.

AB - Silver and gold films with thicknesses in the range of 120-450nm were evaporated onto glass substrates. A sequence of slits with widths varying between 70 and 270nm was milled in the films using a focused gallium ion beam. We have undertaken high-resolution measurements of the optical transmission through the single slits with 488.0 nm (for Ag) and 632.8nm (for Au) laser sources aligned to the optical axis of a microscope. Based on the present experimental results, it was possible to observe that (1) the slit transmission is notably affected by the film thickness, which presents a damped oscillatory behavior as the thickness is augmented, and (2) the transmission increases linearly with increasing slit width for a fixed film thickness.

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U2 - 10.1364/AO.50.000G11

DO - 10.1364/AO.50.000G11

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Influence of film thickness on the optical transmission through subwavelength single slits in metallic thin films

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