TY - JOUR
T1 - 3D Microstructured Frequency Selective Surface Based on Carbonized Polyimide Films for Terahertz Applications
AU - Hlaing, May Zin
AU - Karthikeyan, Vaithinathan
AU - Wu, Wei
AU - Chen, Bao Jie
AU - Ng, Aaron Kubong
AU - Chan, Chi Hou
AU - De Souza, Maria Merlyne
AU - Roy, Vellaisamy A.L.
N1 - Publisher Copyright:
© 2022 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.
PY - 2022/4/19
Y1 - 2022/4/19
N2 - In recent years, frequency selective surface (FSS)-based two-dimensional (2D) and three-dimensional (3D) carbon materials such as carbon nanofibers, carbon nanotubes, and carbon-filled filaments are essential tools to design millimeter-wave radomes, absorbers, electromagnetic interference (EMI) shielding, and antenna reflectors in gigahertz (GHz) regimes. Terahertz (THz) technologies are gaining attentions from medical imaging to security surveillance. In this work, a 3D microstructured FSS using carbon-based polyimide as a precursor to enhance the resonant frequency at the THz range. Furthermore, gold nanoparticles (AuNPs) are embedded on 3D microsturctured carbonized polyimide (3D-CPI) film to improve their FSS property through plasmonic effects. From the time domain spectroscopy measurements, 3D-CPI FSS film shows band-stop filter properties in the frequency range of 0.5–1.5 THz and with a maximum return loss (RL) of 40.5 dB (at the resonant frequency of 1 THz). The 3D-CPI/AuNPs film demonstrates the highest RL of 43.7 dB at the higher excitation resonance frequency ≈1.06 THz due to the interaction of plasmonic electrons with scattered delocalized electrons in carbon, which induces the mechanisms for EMI shielding. The results will open insight into 3D plasmonic carbon microstructures as an EMI shielding material at THz frequency.
AB - In recent years, frequency selective surface (FSS)-based two-dimensional (2D) and three-dimensional (3D) carbon materials such as carbon nanofibers, carbon nanotubes, and carbon-filled filaments are essential tools to design millimeter-wave radomes, absorbers, electromagnetic interference (EMI) shielding, and antenna reflectors in gigahertz (GHz) regimes. Terahertz (THz) technologies are gaining attentions from medical imaging to security surveillance. In this work, a 3D microstructured FSS using carbon-based polyimide as a precursor to enhance the resonant frequency at the THz range. Furthermore, gold nanoparticles (AuNPs) are embedded on 3D microsturctured carbonized polyimide (3D-CPI) film to improve their FSS property through plasmonic effects. From the time domain spectroscopy measurements, 3D-CPI FSS film shows band-stop filter properties in the frequency range of 0.5–1.5 THz and with a maximum return loss (RL) of 40.5 dB (at the resonant frequency of 1 THz). The 3D-CPI/AuNPs film demonstrates the highest RL of 43.7 dB at the higher excitation resonance frequency ≈1.06 THz due to the interaction of plasmonic electrons with scattered delocalized electrons in carbon, which induces the mechanisms for EMI shielding. The results will open insight into 3D plasmonic carbon microstructures as an EMI shielding material at THz frequency.
KW - EMI shielding
KW - band stop filter
KW - carbon materials
KW - frequency selective surface
KW - terahertz spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85125467344&partnerID=8YFLogxK
U2 - 10.1002/adom.202102178
DO - 10.1002/adom.202102178
M3 - Article
AN - SCOPUS:85125467344
VL - 10
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 8
M1 - 2102178
ER -