Presentation 2005/1/14
Optical Nonlinearities of Metal Nanoparticles with Various Shapes and Sizes
Arao NAKAMURA, Yasushi HAMANAKA, Noriyuki OKADA, Kazuhiro FUKUTA, Yutaka TAI, Junichi MURAKAMI, Luis M. LIZ-MARZAN, Paul MULVANEY,
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Abstract(in English) We have investigated linear and nonlinear optical response of metal nanoparticles with various shapes and sizes. For silica-capped Au nanoparticles, the imaginary part of χ^<(3)> (Imχ^<(3)>) around surface plasmon resonance increases with incrasing volume fraction p of nanoparticles up to 0.34. In addition to the local field enhancement, additional enhancement of Imχ^<(3)> due to the interaction between nanoparticles is observed. In Ag nanoprisms with the edge length of 67 nm and thickness of 35 nm, dipole and quadrupole plasmon resonance bands have been observed in absorption spectra. The local field factors f_Q and f_D of quadrupole and dipole plasmon resonacnes have been obtained from the values of absorption coefficient and Imχ^<(3)>. The ratio f_Q/f_D is found to be 0.7. We have also investigated optical response of Au clusters with 28 to 148 atoms. For clusters with 28 and 48 atoms optical transitions due to quantized levels of sp bands are observed. We have found that Imχ^<(3)> shows resonance enhancement at the optical transitions due to quantized levels and the value of Imχ^<(3)> is comparable to that of Au nanoparticles with a size of 15 nm.
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Keyword(in English) Surface plasmon / Quantum size effect / Nonlinear optical properties / Photonics
Paper # OME2004-111
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Committee OME
Conference Date 2005/1/14(1days)
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Registration To Organic Material Electronics (OME)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Optical Nonlinearities of Metal Nanoparticles with Various Shapes and Sizes
Sub Title (in English)
Keyword(1) Surface plasmon
Keyword(2) Quantum size effect
Keyword(3) Nonlinear optical properties
Keyword(4) Photonics
1st Author's Name Arao NAKAMURA
1st Author's Affiliation School of Engineering, Nagoya University and CREST-JST()
2nd Author's Name Yasushi HAMANAKA
2nd Author's Affiliation Faculty of Engineering, Nagoya Institute of Technology
3rd Author's Name Noriyuki OKADA
3rd Author's Affiliation School of Engineering, Nagoya University and CREST-JST
4th Author's Name Kazuhiro FUKUTA
4th Author's Affiliation School of Engineering, Nagoya University and CREST-JST
5th Author's Name Yutaka TAI
5th Author's Affiliation Chubu Research Base, National Research Institute of Advanced Industrial Science and Technology
6th Author's Name Junichi MURAKAMI
6th Author's Affiliation Chubu Research Base, National Research Institute of Advanced Industrial Science and Technology
7th Author's Name Luis M. LIZ-MARZAN
7th Author's Affiliation University of Vigo
8th Author's Name Paul MULVANEY
8th Author's Affiliation University of Melbourne
Date 2005/1/14
Paper # OME2004-111
Volume (vol) vol.104
Number (no) 578
Page pp.pp.-
#Pages 6
Date of Issue