title: Conjugated polymer-based broadband terahertz wave modulator.
abstract: An optical broadband terahertz (THz) wave modulator, based on a polymer-inorganic interface, is investigated. The THz pulse transmission was efficiently modulated by an external continuous wave (CW) laser. The effects on the poly[2-methoxy-5-(2'-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV)/silicon interface were measured by THz time-domain spectroscopy. The modulation factor reached 99.6%, at an external laser beam intensity of 6.3  W/cm2. In the proposed THz-CW system, a significant fall (in both THz transmission and reflection) was also observed at the MEH-PPV/Si interface. This reduction in THz transmission and reflection has been induced by absorption at the MEH-PPV/Si interface. The results show that an optically controlled polymer/inorganic broadband THz modulator can be realized.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Ting
authors.initials: T
authors.lastname: He
authors.forename: Jingling
authors.initials: J
authors.lastname: Shen
authors.forename: Yanbing
authors.initials: Y
authors.lastname: Hou
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Hu
authors.forename: Mengdi
authors.initials: M
authors.lastname: Zang
authors.forename: Tianji
authors.initials: T
authors.lastname: Chen
authors.forename: Shengfei
authors.initials: S
authors.lastname: Feng
authors.forename: Feng
authors.initials: F
authors.lastname: Teng
authors.forename: Liang
authors.initials: L
authors.lastname: Qin