Monolayer Excitonic Emission for Imaging Spatial Dispersion of Photonic Crystals

Wenzhuo Huang, Chawina De-Eknamkul, Xingwang Zhang, Eric Leewong, Meng Qiang Zhao, A. T.Charlie Johnson, Ertugrul Cubukcu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Spatial dispersion of a photonic crystal manifests itself as an angle dependent optical response. Here, we use the emerging two-dimensional transition metal dichalcogenides (TMDCs) as a photon source to directly image the spatial dispersion in the reciprocal space. Excitonic emission from a monolayer MoS2 is coupled to the delocalized Fano resonances supported by the photonic crystal slab, recreating isofrequency contours in the far-field. This integration of monolayer TMDCs and photonic crystal not only reveals the band structure of a photonic crystal but also provides a new route to controllable and directional excitonic light sources.

Original languageEnglish (US)
Pages (from-to)2312-2319
Number of pages8
JournalACS Photonics
Issue number9
StatePublished - Sep 18 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


  • MoS
  • directional emission
  • isofrequency contours
  • photonic crystal
  • spatial dispersion


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