Direct observation of a transition of a surface plasmon resonance from a photonic crystal effect.
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.
Zhang
Weili
W
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Azad
Abul K
AK
Han
Jiaguang
J
Xu
Jingzhou
J
Chen
Jian
J
Zhang
X-C
XC