研究目的
To demonstrate a class of narrowband transmissive filters in the terahertz spectrum based on guided-mode resonances in thin films of the low-loss cyclo-olefin polymer Zeonor, with applications in emerging terahertz wireless communication systems.
研究成果
The proposed THz filters combine high transmittance, narrow linewidth, increased out-of-band rejection, compact size, mechanical stability, and low manufacturing cost. Both polarization-selective and polarization-independent responses are demonstrated, with potential applications in filtering transmit and receive communication channels using a single filter.
研究不足
The study is limited by the current availability of Zeonor films for substrate thickness variation and the intrinsic material losses of aluminum and Zeonor affecting the filter's peak transmittance.
1：Experimental Design and Method Selection:
The study employs the excitation of guided-mode resonances in thin films of Zeonor with patterned aluminum stripe and patch arrays via standard photolithography.
2：Sample Selection and Data Sources:
Seven different chips were designed and fabricated, characterized via terahertz time-domain spectroscopy (THz-TDS).
3：List of Experimental Equipment and Materials:
Includes a Menlo Systems TERA K15 all fiber-coupled spectrometer, Karl Suss MA150 mask aligner, and materials like aluminum and Zeonor.
4：Experimental Procedures and Operational Workflow:
Fabrication involved UV photolithography, aluminum evaporation, and wet-etching. Characterization was done in transmission mode in nitrogen environment.
5：Data Analysis Methods:
Spectral characteristics were calculated via fast Fourier transformation of the time-domain signals, with theoretical finite-element simulations performed via COMSOL Multiphysics.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
