Low-cost and broadband terahertz antireflection coatings based on DMSO-doped PEDOT/PSS
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AbstractWe report the potential application of 6%dimethylsulfoxide (DMSO)-doped poly (3, 4-ethylenedioxythiophene)/poly (4-styrenesulfonate) (PEDOT/PSS) as a low cost and broadband terahertz (THz) antireflection coating based on the impedance matching effect. The reflected pulses from the quartz and silicon substrates are observed to change with the thickness of the PEDOT/PSS layer. Theoretical analysis based on an equivalent transmission line circuit model and FDTD computational simulations have been used to understand the experimental results. Excellent impedance matching is achieved by a ∼39-nm-thick 6% DMSO-doped PEDOT/PSS layer on quartz, and a ∼101-nm-thick 6% DMSO-doped PEDOT/PSS layer on silicon due to the almost-frequency-independent conductivity of the thin film between 0.3 and 2.5 THz. In the critical conditions, the normalizedmain pulse transmission remains as high as 74%and 64%, for the quartz and silicon substrates, respectively, significantly higher than the existing state of the art THz antireflection coatings.
All Author(s) ListYan F., Parrott E.P.J., Liu X.D., Pickwell-MacPherson E.
Journal nameOptics Letters
Year2015
Month1
Day1
Volume Number40
Issue Number12
PublisherOptical Society of America
Place of PublicationUnited States
Pages2886 - 2889
ISSN0146-9592
eISSN1539-4794
LanguagesEnglish-United Kingdom

Last updated on 2021-27-01 at 01:11