Journal
OPTICS LETTERS
Volume 34, Issue 18, Pages 2867-2869Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.002867
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The observation of surface-plasmon resonances in indium tin oxide (ITO) thin films is complemented with the effects of hybrid ITO/Au conducting layers where charge densities can be tuned. Where carrier densities are similar (ITO and nanoparticle Au), the plasmonic behavior is that of a monolithic ITO thin film. Where the carrier density of one layer is much greater than that of the other (ITO and Au metal), boundary conditions lead to cancelation of the surface plasmon. In the latter case a capacitivelike plasmon resonance is observed for sufficiently thin films. (C) 2009 Optical Society of America
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