Broadband, polarization-insensitive, and wide-angle optical absorber based on fractal plasmonics

A.E. Dorche; S. Abdollahramezani; A. Chizari; A. Khavasi

doi:10.1109/LPT.2016.2605503

Broadband, polarization-insensitive, and wide-angle optical absorber based on fractal plasmonics

A.E. Dorche
, S. Abdollahramezani
, A. Chizari
, A. Khavasi

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

28 Citations (Scopus)

Abstract

In this letter, a plasmonic absorber consisting of a metal-dielectric-metal stack with a top layer of Sierpinski nanocarpet is theoretically investigated. Such a compact absorber depicts broadband angle-independent behavior over a wide optical wavelength range (400-700 nm) and a broad range of incidence angles (0°-80°). Including several feature sizes, such a fractal-like structure shows an average simulated extinction response of 0.85 for either transverse electric or magnetic polarization states under normal incidence. Underlying mechanisms of absorbance due to excited surface plasmon modes as well as electric/magnetic dipole resonances are well revealed by investigating electric field, magnetic field, and current distributions. The proposed absorber opens a path to realize high-performance ultrathin light trapping devices.

Original language	English
Pages (from-to)	2545 - 2548
Journal	IEEE photonics technology letters
Volume	28
Issue number	22
DOIs	https://doi.org/10.1109/LPT.2016.2605503
Publication status	Published - 2016
Externally published	Yes

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10.1109/LPT.2016.2605503

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title = "Broadband, polarization-insensitive, and wide-angle optical absorber based on fractal plasmonics",

abstract = "In this letter, a plasmonic absorber consisting of a metal-dielectric-metal stack with a top layer of Sierpinski nanocarpet is theoretically investigated. Such a compact absorber depicts broadband angle-independent behavior over a wide optical wavelength range (400-700 nm) and a broad range of incidence angles (0°-80°). Including several feature sizes, such a fractal-like structure shows an average simulated extinction response of 0.85 for either transverse electric or magnetic polarization states under normal incidence. Underlying mechanisms of absorbance due to excited surface plasmon modes as well as electric/magnetic dipole resonances are well revealed by investigating electric field, magnetic field, and current distributions. The proposed absorber opens a path to realize high-performance ultrathin light trapping devices.",

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AU - Abdollahramezani, S.

AU - Chizari, A.

AU - Khavasi, A.

PY - 2016

Y1 - 2016

N2 - In this letter, a plasmonic absorber consisting of a metal-dielectric-metal stack with a top layer of Sierpinski nanocarpet is theoretically investigated. Such a compact absorber depicts broadband angle-independent behavior over a wide optical wavelength range (400-700 nm) and a broad range of incidence angles (0°-80°). Including several feature sizes, such a fractal-like structure shows an average simulated extinction response of 0.85 for either transverse electric or magnetic polarization states under normal incidence. Underlying mechanisms of absorbance due to excited surface plasmon modes as well as electric/magnetic dipole resonances are well revealed by investigating electric field, magnetic field, and current distributions. The proposed absorber opens a path to realize high-performance ultrathin light trapping devices.

AB - In this letter, a plasmonic absorber consisting of a metal-dielectric-metal stack with a top layer of Sierpinski nanocarpet is theoretically investigated. Such a compact absorber depicts broadband angle-independent behavior over a wide optical wavelength range (400-700 nm) and a broad range of incidence angles (0°-80°). Including several feature sizes, such a fractal-like structure shows an average simulated extinction response of 0.85 for either transverse electric or magnetic polarization states under normal incidence. Underlying mechanisms of absorbance due to excited surface plasmon modes as well as electric/magnetic dipole resonances are well revealed by investigating electric field, magnetic field, and current distributions. The proposed absorber opens a path to realize high-performance ultrathin light trapping devices.

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JO - IEEE photonics technology letters

JF - IEEE photonics technology letters

IS - 22

ER -

Broadband, polarization-insensitive, and wide-angle optical absorber based on fractal plasmonics

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