Controlling the spontaneous emission rate of monolayer MoS2 in a photonic crystal nanocavity
Abstract
We report on controlling the spontaneous emission (SE) rate of a molybdenum disulfide (MoS2) monolayer coupled with a planar photonic crystal (PPC) nanocavity. Spatially resolved photoluminescence (PL) mapping shows strong variations of emission when the MoS2 monolayer is on the PPC cavity, on the PPC lattice, on the air gap, and on the unpatterned gallium phosphide substrate. Polarization dependences of the cavity-coupled MoS2 emission show a more than 5 times stronger extracted PL intensity than the un-coupled emission, which indicates an underlying cavity mode Purcell enhancement of the MoS2 SE rate exceeding a factor of 70.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2013
- DOI:
- 10.1063/1.4826679
- arXiv:
- arXiv:1310.0923
- Bibcode:
- 2013ApPhL.103r1119G
- Keywords:
-
- light polarisation;
- molybdenum compounds;
- photoluminescence;
- photonic crystals;
- spontaneous emission;
- 78.55.Hx;
- 42.70.Qs;
- Other solid inorganic materials;
- Photonic bandgap materials;
- Physics - Optics;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 8 pages, 3 figures