Structural surface wave properties of amorphous Bi2Te3 by pulsed laser deposition in the visible and near-infrared regions
Zhen Chai,
Xiaoyong Hu,
Yifan Zhao,
You Wu,
Shufang Wang,
Hong Yang,
Qihuang Gong
Affiliations
Zhen Chai
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
Xiaoyong Hu
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
Yifan Zhao
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
You Wu
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
Shufang Wang
College of Physics Science & Technology, Hebei University, Baoding, Hebei 071002, P. R. China
Hong Yang
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
Qihuang Gong
State Key Laboratory for Mesoscopic Physics & Department of Physics, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, P. R. China
Owing to the unique properties of evanescent fields, surface waves show great applications in near field enhancement and in breaking the resolution limit. In this work, we found the amorphous-state Bi2Te3 film deposited by pulsed laser deposition exhibits surface wave properties in an ultrawide waveband ranging from the visible to near-infrared regions. We analyze the surface wave in three ways: the propagation form, localized form, and coupling with a gold nanobar. This work not only breaks the strict limit of a Bi2Te3 topological crystalline insulator but also widens the wavelength region of surface waves compared with a previous report.
