Related Experiment Video
Updated: May 18, 2026
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Effects of plasmonic coupling and electrical current on persistent photoconductivity of single-layer graphene on
Chih-Yi Liu1, Kengchih Liang, Chun-Cheng Chang
1Advanced Optoelectronic Technology Center, National Cheng Kung University, No1, University Road, Tainan 701, Taiwan.
Abstract:
Effects and mechanisms of conductivity variation of chemically vapor deposited single-layer graphene covering silver nanoparticles on SiO(2)/Si are reported based on blue-light (405 nm) induced plasmonic coupling and electrical current induced annealing and desorption of surface adsorbates. With 1V applied voltage, photoconductivity is positive except a brief negative period when the graphene is first illuminated by light. At 10 mV applied voltage, negative photoconductivity persists for hours. In comparison, negative photoconductivity of graphene on pristine SiO(2)/Si persists for tens of hours. When the applied voltage is increased to 1V, it takes tens of hours of light illumination to change to positive photoconductivity.
