Molecular Plasmonics
Adam Lauchner
Andrea E. Schlather
Alejandro Manjavacas
Yao Cui
Michael J. McClain
Grant J. Stec
F. Javier García de Abajo
Peter Nordlander
Naomi J. Halas
10.1021/acs.nanolett.5b02549.s001
https://acs.figshare.com/articles/journal_contribution/Molecular_Plasmonics/2133295
Graphene supports surface plasmons
that have been observed to be both electrically and geometrically
tunable in the mid- to far-infrared spectral regions. In particular,
it has been demonstrated that graphene plasmons can be tuned across
a wide spectral range spanning from the mid-infrared to the terahertz.
The identification of a general class of plasmonic excitations in
systems containing only a few dozen atoms permits us to extend this
versatility into the visible and ultraviolet. As appealing as this
extension might be for active nanoscale manipulation of visible light,
its realization constitutes a formidable technical challenge. We experimentally
demonstrate the existence of molecular plasmon resonances in the visible
for ionized polycyclic aromatic hydrocarbons (PAHs), which we reversibly
switch by adding, then removing, a single electron from the molecule.
The charged PAHs display intense absorption in the visible regime
with electrical and geometrical tunability analogous to the plasmonic
resonances of much larger nanographene systems. Finally, we also use
the switchable molecular plasmon in anthracene to demonstrate a proof-of-concept
low-voltage electrochromic device.
2015-09-09 00:00:00
graphene plasmons
reversibly switch
electrochromic device
PAHs display
nanographene systems
Molecular PlasmonicsGraphene
plasmonic resonances
surface plasmons
plasmonic excitations
plasmon resonances
dozen atoms
nanoscale manipulation