Large dynamic resonance transition between surface plasmon and localized surface plasmon modes.
We present resonant terahertz transmission in a composite plasmonic film comprised of an array of subwavelength metallic patches and semiconductor holes. A large dynamic transition between a dipolar localized surface plasmon mode and a surface plasmon resonance near 0.8 THz is observed under near infrared optical excitation. The reversal in transmission amplitude from a stop-band to a pass-band and up to pi/2 phase shift achieved in the composite plasmonic film make it promising in large dynamic phase modulation, optical changeover switching, and active terahertz plasmonics.
Tian
Zhen
Z
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Azad
Abul K
AK
Lu
Xinchao
X
Gu
Jianqiang
J
Han
Jiaguang
J
Xing
Qirong
Q
Taylor
Antoinette J
AJ
O'Hara
John F
JF
Zhang
Weili
W