Scanning near-field optical microspectroscopy of single perylene microcrystals

Jun Ichi Niitsuma, Toru Fujimura, Tadashi Itoh, Hitoshi Kasai, Shuji Okada, Hidetoshi Oikawa, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Perylene microcrystals are known to show characteristic change in the exciton fluorescence spectra depending on the crystal size less than about 200nm. However, the origin of the size-dependence is not yet clear. In this work, we have studied on individual microcrystals by a scanning near-field optical microscope (SNOM). The samples were prepared by a modified technique based on reprecipitation method. As a result, we could successfully measure the topographic and fluorescence images of perylene microcrystals with the size of ∼200nm by SNOM at room temperature. In the fluorescence spectra of the single microcrystals, free and self-trapped exciton bands were successfully observed but they did not show any critical difference from that of the bulk crystals. Some possibility of environmental difference is discussed.

Original languageEnglish
Pages (from-to)3901-3903
Number of pages3
JournalInternational Journal of Modern Physics B
Volume15
Issue number28-30
Publication statusPublished - 2001 Dec 10

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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