Journal
OPTICS LETTERS
Volume 35, Issue 23, Pages 3988-3990Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.003988
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Funding
- Engineering and Physical Sciences Research Council (EPSRC)
- National Science Foundation (NSF) [ECE-0801980]
- Engineering and Physical Sciences Research Council [EP/D063329/1, EP/H000917/1, EP/H000917/2] Funding Source: researchfish
- EPSRC [EP/D063329/1, EP/H000917/1, EP/H000917/2] Funding Source: UKRI
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0801985] Funding Source: National Science Foundation
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We demonstrate thermally controlled plasmon resonance modulation of single gold nanoparticles on vanadium dioxide thin films by performing dark-field spectroscopy measurements at different temperatures. The plasmon resonance of the nanoparticles exhibits a significant blueshift in the visible range when the vanadium dioxide film undergoes its insulator-to-metal phase transition around 67 degrees C. More importantly, the resonance shift shows a clear hysteresis, mirroring the behavior of the vanadium dioxide film. At a fixed wavelength, the scattering intensity of Au particles also shows a hysteretic behavior decorated with an overshoot before (after) the insulator-metal (metal-insulator) phase transition of the vanadium dioxide film, suggesting that the nanoparticle is probing local variations in the phase transition. (C) 2010 Optical Society of America
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