1 research outputs found
Plasmonically Enhanced Electron Escape from Gold Nanoparticles and Their Polarization-Dependent Excitation Transfer along DNA Nanowires
Here we show plasmon mediated excitation
transfer along DNA nanowires
over up to one micrometer. Apparently, an electron excitation is initiated
by a femtosecond laser pulse that illuminates gold nanoparticles (AuNP)
on double stranded DNA (dsDNA). The dependency of this excitation
on laser wavelength and polarization are investigated. Excitation
of the plasmon resonance of the AuNPs via one- and two-photon absorption
at 520 and 1030 nm, respectively, was explored. We demonstrate an
excitation transfer along dsDNA molecules at plasmon supported four-photon
excitation of AuNP cluster or at laser field driven nanoparticle electron
tunneling for an alignment of the attached dsDNA to the polarization
of the electric field of the laser light. These results extend the
previously observed plasmonically induced three-photon excitation
transfer along DNA nanowires to another nanoparticle material (gold)
and the adapted irradiation wavelengths