TY - JOUR
T1 - Broadband, polarization-insensitive, and wide-angle optical absorber based on fractal plasmonics
AU - Dorche, A.E.
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.
KW - n/a OA procedure
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85027059365&partnerID=MN8TOARS
U2 - 10.1109/LPT.2016.2605503
DO - 10.1109/LPT.2016.2605503
M3 - Article
SN - 1041-1135
VL - 28
SP - 2545
EP - 2548
JO - IEEE photonics technology letters
JF - IEEE photonics technology letters
IS - 22
ER -