The localized surface plasmon resonances (LSPRs) of nanoparticle materials give rise to strong optical and electronic response when the particles are irradiated with resonant frequencies of light. LSPRs cause huge enhancements of the nanoparticle surface electric fields and so also affect the optical and electronic properties of nearby materials. Here we synthesize hybrid nanoparticle systems of two different plasmonic materials, a noble metal and a semiconductor, to study the interactions between LSPRs of different frequencies. These interactions can influence both the strength and position of the LSPR as well as the nonlinear optical properties, which are heavily influenced by the presence of a plasmonic field. We present hybrid systems consisting of a gold domain and a plasmonic copper chalcogenide (CuS, Cu2S, and Cu2-xSe) domain, both with and without a silica spacer to control distance between the two materials. Understanding how LSPR interactions affect the properties of a hybrid nanoparticle will open new avenues for the control of LSPR-based technology, including sensors and bioimaging.

Surface plasmon interaction studies on hybrid nanoparticles with two plasmonic domains

249th National Meeting (2015)

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