Wen, FangfangZhang, YueGottheim, SamuelKing, Nicholas S.Zhang, YuNordlander, PeterHalas, Naomi J.2016-04-042016-04-042015Wen, Fangfang, Zhang, Yue, Gottheim, Samuel, et al.. "Charge Transfer Plasmons: Optical Frequency Conductances and Tunable Infrared Resonances." <i>ACS Nano,</i> 9, no. 6 (2015) American Chemical Society: 6428-6435. http://dx.doi.org/10.1021/acsnano.5b02087.https://hdl.handle.net/1911/88847A charge transfer plasmon (CTP) appears when an optical-frequency conductive pathway between two metallic nanoparticles is established, enabling the transfer of charge between nanoparticles when the plasmon is excited. Here we investigate the properties of the CTP in a nanowire-bridged dimer geometry. Varying the junction geometry controls its conductance, which modifies the resonance energies and scattering intensities of the CTP while also altering the other plasmon modes of the nanostructure. Reducing the junction conductance shifts this resonance to substantially lower energies in the near- and mid-infrared regions of the spectrum. The CTP offers both a high-information probe of optical frequency conductances in nanoscale junctions and a new, unique approach to controllably engineering tunable plasmon modes at infrared wavelengths.engThis is an open access article published under an ACS AuthorChoiceﾠLicense, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.Journal articlecharge transfer plasmonoptical antennaIR plasmonelectric currentsingle-particle dark-field spectroscopyelectron beam lithographyhttp://dx.doi.org/10.1021/acsnano.5b02087