Multifold enhancement of quantum dot luminescence in plasmonic metamaterials

Phys Rev Lett. 2010 Nov 26;105(22):227403. doi: 10.1103/PhysRevLett.105.227403. Epub 2010 Nov 24.


We report that hybridizing semiconductor quantum dots with plasmonic metamaterial leads to a multifold intensity increase and narrowing of their photoluminescence spectrum. The luminescence enhancement is a clear manifestation of the cavity quantum electrodynamics Purcell effect and can be controlled by the metamaterial's design. This observation is an essential step towards understanding loss compensation in plasmonic metamaterials with gain media and for developing metamaterial-enhanced gain media.