Spectral inhomogeneities and spatially resolved dynamics in porphyrin J-aggregate studied in the near-field

Tetsuhiko Nagahara, Kohei Imura, Hiromi Okamoto

研究成果: Article

33 引用 (Scopus)

抄録

Mesoscopic properties of water-insoluble tetrakis(4-methoxyphenyl) porphyrin J-aggregate in thin film have been investigated by time-resolved scanning near-field optical microscopy. The film was found to be composed of planar microcrystallines with lengths of a few micrometers, widths of ∼100 nm, and ∼20 nm heights. The transmittance spectra are site-specific. This observation might reflect inhomogeneity of the sample, and is related to the broad J-bands compared to those of tetrakis(4-sulfonatophenyl)porphyrin. Excited-state lifetimes, obtained from pump-probe measurements in small domains, were ranging from 10 to 50 ps that are of the same order with the far-field results.

元の言語English
ページ(範囲)368-375
ページ数8
ジャーナルChemical Physics Letters
381
発行部数3-4
DOI
出版物ステータスPublished - 2003 11 14
外部発表Yes

Fingerprint

Near field scanning optical microscopy
Porphyrins
Excited states
porphyrins
near fields
inhomogeneity
Pumps
Thin films
Water
far fields
micrometers
transmittance
pumps
microscopy
life (durability)
scanning
probes
thin films
water
excitation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

これを引用

Spectral inhomogeneities and spatially resolved dynamics in porphyrin J-aggregate studied in the near-field. / Nagahara, Tetsuhiko; Imura, Kohei; Okamoto, Hiromi.

:: Chemical Physics Letters, 巻 381, 番号 3-4, 14.11.2003, p. 368-375.

研究成果: Article

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