Abstract
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 language | English (US) |
---|---|
Pages (from-to) | 2312-2319 |
Number of pages | 8 |
Journal | ACS Photonics |
Volume | 6 |
Issue number | 9 |
DOIs | |
State | Published - Sep 18 2019 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Keywords
- MoS
- directional emission
- isofrequency contours
- photonic crystal
- spatial dispersion