Chiroptical effects in planar achiral plasmonic oriented nanohole arrays

Ben M. Maoz, Assaf Ben Moshe, Daniel Vestler, Omri Bar-Elli, Gil Markovich

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Chiroptical effects are routinely observed in three dimensional objects lacking mirror symmetry or quasi-two-dimensional thin films lacking in-plane mirror symmetry. Here we show that symmetric plasmonic planar arrays of circular nanoholes produced strong chiroptical responses at visible wavelengths on tilting them with respect to the incident light beam due to the collective asymmetric nature of their surface plasmon excitations. This extrinsic chiroptical effect can be stronger than the local chiroptical response in arrays of intrinsically chiral nanoholes and may be useful for chiral sensing and negative refraction.

Original languageEnglish
Pages (from-to)2357-2361
Number of pages5
JournalNano Letters
Issue number5
StatePublished - 9 May 2012
Externally publishedYes


  • 2D chirality
  • Nanohole arrays
  • circular dichroism
  • extrinsic chirality
  • plasmonic nanostructures


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