Reciprocity in scanning near-field optical microscopy: Illumination and collection modes of transmission measurements

Kohei Imura, Hiromi Okamoto

Research output: Contribution to journalArticle

30 Citations (Scopus)


We experimentally investigated the reciprocity of scanning near-field optical microscopy between illumination and collection modes. Near-field transmission images of single gold spheres and nanorods observed by the two modes are found to be equivalent to each other in the region from visible to near infrared. This result shows that reciprocity holds for the near-field scattering problems. We found that the conventional optical selection rule for far-field excitations does not apply not only under illumination mode but also with collection-mode arrangements. The possible origin of this observation might be the near-field probe.

Original languageEnglish
Pages (from-to)1474-1476
Number of pages3
JournalOptics Letters
Issue number10
Publication statusPublished - 2006 May 15


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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