000230288 001__ 230288
000230288 005__ 20190317000805.0
000230288 0247_ $$2doi$$a10.1021/acsnano.6b08589
000230288 022__ $$a1936-086X
000230288 02470 $$2ISI$$a000400233200009
000230288 037__ $$aARTICLE
000230288 245__ $$aMode Coupling in Plasmonic Heterodimers Probed with Electron Energy Loss Spectroscopy
000230288 260__ $$bAmerican Chemical Society$$c2017
000230288 269__ $$a2017
000230288 336__ $$aJournal Articles
000230288 520__ $$aWhile plasmonic antennas composed of building blocks made of the same material have been thoroughly studied, recent investigations have highlighted the unique opportunities enabled by making compositionally asymmetric plasmonic systems. So far, mainly heterostructures composed of nanospheres and nanodiscs have been investigated, revealing opportunities for the design of Fano resonant nanostructures, directional scattering, sensing and catalytic applications. In this article, an improved fabrication method is reported that enables precise tuning of the heterodimer geometry, with interparticle distances made down to a few nanometers between Au–Ag and Au–Al nanoparticles. A wide range of mode energy detuning and coupling conditions are observed by near field hyperspectral imaging performed with electron energy loss spectroscopy, supported by full wave analysis numerical simulations. These results provide direct insights into the mode hybridization of plasmonic heterodimers, pointing out the influence of each dimer constituent in the overall electromagnetic response. By relating the coupling of nondipolar modes and plasmon–interband interaction with the dimer geometry, this work facilitates the development of plasmonic heterostructures with tailored responses, beyond the possibilities offered by homodimers.
000230288 6531_ $$abimetallic antennas
000230288 6531_ $$aeigenmodes
000230288 6531_ $$aelectron beam lithography
000230288 6531_ $$aelectron energy loss spectroscopy
000230288 6531_ $$aoptical nanoantennas
000230288 6531_ $$aplasmonic heterostructures
000230288 6531_ $$aNanophotonics
000230288 6531_ $$aPlasmonics
000230288 700__ $$0245734$$g180486$$aFlauraud, Valentin
000230288 700__ $$aBernasconi, Gabriel D.
000230288 700__ $$aButet, Jérémy
000230288 700__ $$0242217$$g180921$$aAlexander, Duncan T. L.
000230288 700__ $$aMartin, Olivier J. F.
000230288 700__ $$aBrugger, Jürgen
000230288 773__ $$j11$$tACS Nano$$k4$$q3485-3495
000230288 8564_ $$uhttps://infoscience.epfl.ch/record/230288/files/Mode%20Coupling%20in%20Plasmonic%20Heterodimers%20Probed%20with%20Electron%20Energy%20Loss%20Spectroscopy.pdf$$zn/a$$s7437116$$yn/a
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000230288 909C0 $$0252025$$pCIME$$xU10192
000230288 909C0 $$xU10373$$pNAM$$0252353
000230288 909CO $$qGLOBAL_SET$$pSB$$pSTI$$particle$$ooai:infoscience.tind.io:230288
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000230288 937__ $$aEPFL-ARTICLE-230288
000230288 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000230288 980__ $$aARTICLE
000230288 981__ $$a252988