研究目的
To propose and experimentally verify a simple and effective continuous-wave THz super-resolution imaging method using 3D printed metal-cladding waveguides.
研究成果
The waveguide-based THz imaging method effectively achieves super-resolution imaging with a resolution of 1/2 of the wavelength, demonstrating high contrast and signal-to-noise ratio. The flexibility of 3D printing technology allows for quick design and fabrication of confocal waveguides, offering potential for advanced low-loss, high-resolution THz imaging applications.
研究不足
The resolution of the presented method is about lambda/2, which does not reach the level of terahertz near-field super-resolution technology. There are also discrepancies between simulation and experimental results due to ideal simulation models, measurement errors, and mechanical motion errors.
1：Experimental Design and Method Selection
The study employs a waveguide-based lens-free terahertz imaging method, utilizing 3D printed and metal-cladded waveguides to replace traditional lenses for THz wave transmission and focusing.
2：Sample Selection and Data Sources
The imaging targets include a USAF 1951 resolution board, a blade hidden in a plastic sheet, and an electromagnetic induction access key card.
3：List of Experimental Equipment and Materials
Two hollow waveguides (8 mm inner diameter, 60 mm length), a 0.1 THz source based on IMPATT diodes, a chopper, pyroelectric detector, and a two-dimensional translation system.
4：Experimental Procedures and Operational Workflow
THz wave is emitted, modulated by a chopper, transmitted through the waveguides, focused on the sample, and detected by a pyroelectric detector after passing through a pinhole. The sample is scanned two-dimensionally to acquire THz images.
5：Data Analysis Methods
The focusing mechanism and transmission characteristics of THz in the waveguide are simulated using CST 2014 software, and the experimental results are compared with simulations.
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
