Enhanced terahertz emission from quantum dot by graphene-coated nanoparticle
The terahertz (THz) emission from quantum dots in close proximity to graphene-coated nanoparticles is studied via phenomenological modeling with particular interest in the possibility of enhancement for such emission via the excitation of the graphene plasmons. It is shown that depending on various factors such as the damping factor and the Fermi level of the graphene, as well as the size and core material of the coated particle, such plasmonic-enhanced THz emission is indeed possible. This thus opens up a new pathway to provide intense THz sources for future applications.
KeywordsTHz emission Plasmonic enhancement Graphene-coated nanoparticles
One of us (PTL) would like to thank Professor Hai-Pang Chiang for hosting his summer visit at the National Taiwan Ocean University where part of this work was completed. We also want to thank Dr. Huai-Yi Xie for help with the figures.
- 1.Nat. Photonics 7(9), 665 (2013)Google Scholar
- 7.A.N. Grigorenko, M. Polini, K.S. Novoselov Nat. Photonics 6, 749 (2012)Google Scholar
- 8.T. Low, P. Avouris, ACS Nano 8, 1086 (2014)Google Scholar
- 11.T. Christensen, A.-P. Jauho, M. Wubs, N.A. Mortensen, Phys. Rev. B 91, 12541 (2015)Google Scholar
- 22.M. Tabata et al., IEEE Nucl. Sci. Conf. Rec. 2, 816 (2005)Google Scholar