Trapping photon-dressed Dirac electrons in a quantum dot studied by coherent two dimensional photon echo spectroscopy
Abstract
We study the localization of dressed Dirac electrons in a cylindrical quantum dot (QD) formed on monolayer and bilayer graphene by spatially different potential profiles. Short lived excitonic states which are too broad to be resolved in linear spectroscopy are revealed by cross peaks in the photon-echo nonlinear technique. Signatures of the dynamic gap in the two-dimensional spectra are discussed. The effect of the Coulomb induced exciton-exciton scattering and the formation of biexciton molecules are demonstrated.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 17, 2012
- Source ID
- 10.1063/1.4707182
Entities
People
- Godfrey Gumbs
- Oleksiy Roslyak
- Shaul Mukamel
Organizations
- City University of New York
- Defense Advanced Research Projects Agency
- National Science Foundation
- University of California, Irvine