SONAR: Localized Surface Plasmon Resonance in doped semiconductor nanocrystals (DFM.AD005.259)

Thematic area

Physical sciences and technologies of matter

Project area

Structure responsible for the research project

Institute for photonics and nanotechnologies (IFN)

Project manager

MONICA BOLLANI
Phone number: 031-3327356
Email: monica.bollani@ifn.cnr.it

Abstract

Doped semiconductor nanocrystals (dSNCs) are an exciting emerging material. Carrier densities in the range of 1020-1021cm-3 lead to localized surface plasmon resonances (LSPRs) in the near infrared (NIR). Prominent examples are copper chalcogenides, where doping occurs via vacancy formation, and metal oxides (MOs) that show plasmonic response due to impurity doping. Excitingly, both materials display post synthetic carrier density and LSPR tunability over a broad spectral range. Combined with layered two dimensional materials exciting manipulation options appear where the plasmon-exciton coupling or 'hot' carrier extraction enables local photo luminescence manipulation or tracking of local currents in a graphene based nano device. This active control over the LSPR allows active switching of the strength of coupling, useful also for the study of exciton-plasmon, plasmon-plasmon coupling, or plasmon induced 'hot' carrier extraction in nano-heterostructures. Ultralow doping allows the study of quantum plasmonics.Ultrafast photodoping, optical switching, active light manipulation or tunable NIR photon detection are additionalexciting applications. W

Start date of activity

01/01/2019

Keywords

localized surface plasmon resonance, layered two-dimensional materials, doped semiconductor nanocrystals

Last update: 03/08/2025