title: Direct observation of a transition of a surface plasmon resonance from a photonic crystal effect.
abstract: Transition of surface-plasmon resonance from out-of-plane photonic crystal effect is observed in a semiconductor array of subwavelength holes by optical pump-terahertz probe measurements. The dielectric properties of the photoexcited array are essentially altered by the intense optical excitation due to photogenerated free carriers. As a result, the array becomes metallic and favors the coupling and propagation of surface plasmons. The photoinduced resonant extremes agree well with the Fano model.
authors.affiliation: School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
authors.forename: Weili
authors.initials: W
authors.lastname: Zhang
authors.forename: Abul K
authors.initials: AK
authors.lastname: Azad
authors.forename: Jiaguang
authors.initials: J
authors.lastname: Han
authors.forename: Jingzhou
authors.initials: J
authors.lastname: Xu
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: X-C
authors.initials: XC
authors.lastname: Zhang