On the role of the electric dipole moment in the diffraction of biomolecules at nanomechanical gratings

Christian Knobloch, Benjamin A. Stickler, Christian Brand, Michele Sclafani, Yigal Lilach, Thomas Juffmann, Ori Cheshnovsky, Klaus Hornberger, Markus Arndt

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate effects of a permanent electric dipole moment on matter-wave diffraction at nanomechanical gratings. Specifically, the diffraction patterns of hypericin at ultra-thin carbonaceous diffraction masks are compared with those of a polar and a non-polar porphyrin derivative of similar mass and de Broglie wavelength. We present a theoretical analysis of the diffraction of a rotating dipole highlighting that small local electric charges in the material mask can strongly reduce the interference visibility. We discuss the relevance of this finding for single grating diffraction and multi-grating interferometry with biomolecules.

Original languageEnglish
Article number1600025
JournalFortschritte der Physik
Volume65
Issue number6-8
DOIs
StatePublished - Jun 2017

Keywords

  • Matter-wave interferometry
  • biomolecules
  • dephasing
  • dipole moment
  • hypericin

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