The transmission enhancement of a THz pulse through an Ag/Ag2O layer detected by terahertz time-domain spectroscopy
Chen Hua(陈华)a)† and Wang Li(汪力)b)
a Department of Physics, Southeast University, Nanjing 210096, China; b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract This paper reports a new way to detect the enhanced transmission of a THz electromagnetic wave through an Ag/Ag2O layer by THz-TDS (time-domain spectroscopy). As the THz beam illuminates the sub-wavelength Ag particles gained by Ag2O thermal decomposition, the evanescent wave is generated. The evanescent wave is coupled by a 500μ m-GaAs substrate, which attaches behind the Ag/Ag2O layer, and then it transmits to the far field to be detected. The experimental results indicate that the transmitting amplitude is enhanced, as well as the frequent shifting and spectra broadening.
Received: 27 October 2008
Revised: 30 December 2008
Accepted manuscript online:
PACS:
78.70.Gq
(Microwave and radio-frequency interactions)
Cite this article:
Chen Hua(陈华) and Wang Li(汪力) The transmission enhancement of a THz pulse through an Ag/Ag2O layer detected by terahertz time-domain spectroscopy 2009 Chin. Phys. B 18 2785
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