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Abstract
We study semi-regular arrays of Au nanoparticles (NP) obtained via UV laser irradiation of thin Au films on glass substrate. The NP structures are prepared from films of a thickness up to 60 nm produced by discharge sputtering or pulsed laser deposition, and annealed by nanosecond laser pulses at 266 or 308 nm, respectively, at fluencies in the range of 60-410 mJ/cm2. For the rare- and close-packed NP structures, consistent description of optical properties is derived from microscopic observation, measurements of the absorption, and Raman spectra, and modeling of the near-field intensity distributions. The absorption bands centered at 540-570 nm are ascribed to resonant absorption of the surface plasmons. For the band positions, half widths, and intensities, the dependence on the NP shape (partial spheres), size, size distribution, and also excitation energy is observed. The structures are characterized by markedly reduced dephasing times of ∼3 fs. It is shown, that laser annealing of thin Au films provides reliable and cost effective method for controlled preparation of semi-regular NP arrays favorable for photonic applications.
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Authors (8)
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Katarzyna Grochowska
- PAN Photophysics Department
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Anna Iwulska
- PAN Photophysics Department
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M. Sawczak
- PAN Photophysics Department
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N. Nedyalkov
- Bulgarian Academy of Sciences Institute of Electronic
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P. Atanasov
- Bulgarian Academy of Sciences Institute of Electronic
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G. Obara
- Keio University Faculty of Science and Technology
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M. Obara
- Keio University Faculty of Science and Technology
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PLASMONICS
no. 8,
edition 1,
pages 105 - 113,
ISSN: 1557-1955 - Language:
- English
- Publication year:
- 2013
- Bibliographic description:
- Grochowska K., Śliwiński G., Iwulska A., Sawczak M., Nedyalkov N., Atanasov P., Obara G., Obara M.: Engineering Au nanoparticle arrays on SiO2 glass by pulsed UV laser irradiation// PLASMONICS. -Vol. 8, iss. 1 (2013), s.105-113
- DOI:
- Digital Object Identifier (open in new tab) 10.1007/s11468-012-9428-3
- Verified by:
- Gdańsk University of Technology
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