The plasmon resonance of periodic and random arrays of Au-nanodiscs and nano-squares was investigated experimentally and numerically. By randomization, plasmon resonance spectra become broadened, however, the electro-magnetic field enhancement is augmented by a factor of 10-10 times at some specific wavelength as shown by the finite-element time-domain calculations. The spatial localization takes place at a fewer hot-spots. The randomized structures are promising for the applications in opto-electronics, sensing and light harvesting.
Long-range interaction of localized surface plasmons in periodic and random patterns of Au nanoparticles / Nishijima, Yoshiaki; Rosa, Lorenzo; Juodkazis, Saulius. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - 115:2(2014), pp. 409-414. [10.1007/s00339-013-8057-9]
Long-range interaction of localized surface plasmons in periodic and random patterns of Au nanoparticles
ROSA, Lorenzo;
2014
Abstract
The plasmon resonance of periodic and random arrays of Au-nanodiscs and nano-squares was investigated experimentally and numerically. By randomization, plasmon resonance spectra become broadened, however, the electro-magnetic field enhancement is augmented by a factor of 10-10 times at some specific wavelength as shown by the finite-element time-domain calculations. The spatial localization takes place at a fewer hot-spots. The randomized structures are promising for the applications in opto-electronics, sensing and light harvesting.
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