Plasmonic phenomena in indium tin oxide and ITO-Au hybrid films.
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.
Franzen
Stefan
S
Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA. Stefan_Franzen@ncsu.edu
Rhodes
Crissy
C
Cerruti
Marta
M
Gerber
Ralph W
RW
Losego
Mark
M
Maria
Jon-Paul
JP
Aspnes
D E
DE