Imaging the crystal structure of few-layer two-dimensional crystals by optical nonlinearity

Leandro M. Malard, Thonimar V. Alencar, Ana Paula M. Barboza, Kin Fai Mak, Ana M. De Paula

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report the observation of second harmonic generation (SHG) from odd-layer MoS2 atomic crystal. In contrast, no SHG is observed for samples with even layer numbers due to the restoration of perfect inversion symmetry. Moreover, the SHG intensity is found to directly reflect the underlying 3-fold rotation symmetry of the crystal, which provides a powerful method for optical imaging of the material crystal structure with sub-micron resolution.

Original languageEnglish (US)
Title of host publicationCLEO
Subtitle of host publicationScience and Innovations, CLEO_SI 2013
StatePublished - Nov 18 2013
EventCLEO: Science and Innovations, CLEO_SI 2013 - San Jose, CA, United States
Duration: Jun 9 2013Jun 14 2013


OtherCLEO: Science and Innovations, CLEO_SI 2013
Country/TerritoryUnited States
CitySan Jose, CA

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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