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- Title
Electrical control of Förster resonant energy transfer across single-layer graphene.
- Authors
Liu, Yansheng; Niño Ortí, Miguel Angel; Luo, Feng; Wannemacher, Reinhold
- Abstract
In artificial structures of molecular or quantum dot emitters in contact with single-layer graphene (SLG) Förster-type resonant energy transfer (FRET) can occur unconditionally due to the gapless band structure of SLG. A significant breakthrough for applications, however, would be the electrical modulation of FRET between arbitrary FRET pairs, using the SLG to control this process and taking advantage of the particular band structure and the monatomic thickness of SLG, far below the typical Förster radius of a few nanometers. For a proof of concept, we have therefore designed a Sandwich device where the SLG was transferred onto holey Si3N4 membranes and organic molecules were deposited on either side of the SLG. The relative photoluminescence (PL) intensities of donor and acceptor molecules changed continuously and reversibly with the external bias voltage, and a variation of about 6% of FRET efficiency has been achieved. We ascribe the origin of the electrical modulation of FRET to important doping-dependent nonlocal optical effects in the near field of SLG in the visible range.
- Subjects
GRAPHENE; MOLECULAR structure; INDUCTIVE effect; PROOF of concept; PHOTOLUMINESCENCE; NARROW gap semiconductors
- Publication
Nanophotonics (21928606), 2022, Vol 11, Issue 14, p3247
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2021-0778