• Acta Photonica Sinica
  • Vol. 50, Issue 8, 0850206 (2021)
Zijie DAI1、2、4, Lixing KANG3, Cheng GONG1、2, Zheng LIU3, and Weiwei LIU1、2
Author Affiliations
  • 1Institute of Modern Optics, Nankai University, Tianjin300350, China
  • 2Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Tianjin300350, China
  • 3School of Materials Science and Engineering, Nanyang Technological University, Singapore69798, Singapore
  • 4Institude of Micro-nano Optoelectronics and Terahertz Technology, Jiangsu University, Zhenjiang, Jiangsu212013, China
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    DOI: 10.3788/gzxb20215008.0850206 Cite this Article
    Zijie DAI, Lixing KANG, Cheng GONG, Zheng LIU, Weiwei LIU. Exploration of PtSe2 Thin Film Based on Time-resolved Terahertz Spectroscopy (Invited)[J]. Acta Photonica Sinica, 2021, 50(8): 0850206 Copy Citation Text show less

    Abstract

    Utilizing the time-resolved terahertz spectroscopy, the optical property of platinum selenide (PtSe2) thin films with different thicknesses in terahertz band are investigated experimentally. As the applied pump fluences increase from 0 to 2 540 μJ/cm2, the conductivity of 11 nm-PtSe2 film increases and further leading to the attenuation of the transmitted terahertz wave. Conversely, the conductivity of 197 nm-PtSe2 film decreases with the enhanced pump fluences that induces the increase of the transmitted terahertz wave. These characters enable PtSe2 thin film to be a photoactive terahertz modulator, which shows an ultrafast (~14 ps) and broadband (0.2~1.8 THz) modulation (15%~35%) of terahertz waves. The research provides a potential PtSe2-based platform to the active and ultrafast photonic devices at terahertz frequencies.
    Zijie DAI, Lixing KANG, Cheng GONG, Zheng LIU, Weiwei LIU. Exploration of PtSe2 Thin Film Based on Time-resolved Terahertz Spectroscopy (Invited)[J]. Acta Photonica Sinica, 2021, 50(8): 0850206
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