title: High-power THz to IR emission by femtosecond laser irradiation of random 2D metallic nanostructures.
abstract: Terahertz (THz) spectroscopic sensing and imaging has identified its potentials in a number of areas such as standoff security screening at portals, explosive detection at battle fields, bio-medical research, and so on. With these needs, the development of an intense and broadband THz source has been a focus of THz research. In this work, we report an intense (~10 mW) and ultra-broadband (~150 THz) THz to infrared (IR) source with a Gaussian wavefront, emitted from nano-pore-structured metallic thin films with femtosecond laser pulse excitation. The underlying mechanism has been proposed as thermal radiation. In addition, an intense coherent THz signal was generated through the optical rectification process simultaneously with the strong thermal signal. This unique feature opens up new avenues in biomedical research.
authors.affiliation: Department of Physics, Capital Normal University, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors.forename: Liangliang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Physics, Capital Normal University, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Mu
authors.affiliation: Department of Physics, Capital Normal University, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors.forename: Yunsong
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Physics, Capital Normal University, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Physics, Capital Normal University, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors.forename: Cunlin
authors.initials: C
authors.lastname: Zhang
authors.affiliation: The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.
authors.forename: X-C
authors.initials: XC
authors.lastname: Zhang