Plasmonic Probe of the Semiconductor to Metal Phase Transition in Vanadium Dioxide

An array of 180 nm diameter gold nanoparticles (NPs) embedded in a thin vanadium dioxide film was used as a nanoscale probe of the thermochromic semiconductor-to-metal transition (SMT) in the VO2. The observed 30% reduction in plasmon dephasing time resulted from the interaction between the localize...

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Veröffentlicht in:	Nano letters 2013-09, Vol.13 (9), p.4169-4175
Hauptverfasser:	Ferrara, Davon W, Nag, Joyeeta, MacQuarrie, Evan R, Kaye, Anthony B, Haglund, Richard F
Format:	Artikel
Sprache:	eng
Schlagworte:	Arrays Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Equations of state, phase equilibria, and phase transitions Exact sciences and technology Gold Gold - chemistry Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials science Nanocrystalline materials Nanoparticles - chemistry Nanoscale materials and structures: fabrication and characterization Nanostructure Oxides - chemistry Physics Plasmonics Plasmons Semiconductors Specific phase transitions Structural transitions in nanoscale materials Surface and interface electron states Surface Plasmon Resonance Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Vanadium Compounds - chemistry Vanadium dioxide Vanadium oxides
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Beschreibung
Zusammenfassung:	An array of 180 nm diameter gold nanoparticles (NPs) embedded in a thin vanadium dioxide film was used as a nanoscale probe of the thermochromic semiconductor-to-metal transition (SMT) in the VO2. The observed 30% reduction in plasmon dephasing time resulted from the interaction between the localized surface plasmon resonance of the NPs with the 1.4 eV electronic transitions in VO2. The NPs act as nanoantennas probing the SMT; homogeneous broadening of the gold plasmon resonance is observed at the temperatures where electron correlations are strongest in VO2.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl401823r