Abstract

This study proposes a plasmonic band-stop filter with surface plasmon resonance in a doublelayer wire grid structure targeting short-wavelength visible and near-ultraviolet regions for applications in ultraviolet photography. Using Ag and Al, the rigorous coupling wave of analysis method revealed that the maximum absorption was approximately 90% at 450 nm and 375 nm. The experiments using Ag produced similar results in a simulation. These results demonstrate that plasmonic band-stop filters in the visible and near-UV region can be realized at 450 nm and 375 nm using Ag or Al.

Highlights

  • Ultraviolet (UV) photography is used in various fields, including medicine, science, engineering, criminal investigation, and visual arts

  • We propose a plasmonic filter using the propagating surface plasmon polariton in a wire grid (WG) structure

  • Experiments demonstrated by designing the structure of the doublelayer WG structure, the extraordinary transmission can be achieved at a specific incident angle and light wavelength [1, 2]

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Summary

Introduction

Ultraviolet (UV) photography is used in various fields, including medicine, science, engineering, criminal investigation, and visual arts. In using non-monochromatic light for UV photography, it is necessary to prepare appropriate filters to transmit or stop transmitting a specific wavelength. Experiments demonstrated by designing the structure of the doublelayer WG structure, the extraordinary transmission can be achieved at a specific incident angle and light wavelength [1, 2]. Results of transmittance mapping indicate that transmission phenomena can be explained by the propagating surface plasmon polariton in the double-layer WG structure.

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