太赫兹金属网带通滤波器与钻石形孔径的敏感太赫兹接收器

IF 3.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-01-27 DOI:10.1109/TTHZ.2025.3534757

Changyun Yoo;Jeffrey L. Hesler;Boris S. Karasik

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引用次数: 0

摘要

在这封信中，我们提出了高性能太赫兹（THz）金属网带通滤波器，该滤波器是为了减轻基于超导热电子测热计（HEB）混频器的敏感太赫兹接收器中的直接探测效应而开发的。这些金属网过滤器是独立的5 μm厚的铜片，上面穿孔有周期性排列的菱形孔。简单的孔径设计最大限度地减少了制造（舍入）误差对滤波器性能的影响，允许精确设计中心频率（1.5-5.5太赫兹），同时在正常入射下保持高（>90%）峰值功率传输和相对较窄的5%-15%带宽。基于有限元法仿真结果，提供了简单的设计方程，可用于快速、高精度的设计。1.9 thz、2.5 thz和4.7 thz滤波器的透射曲线实测结果与仿真结果吻合良好。这些过滤器与低温操作兼容，可以大大降低HEB混合器的直接检测效果。

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THz Metal-Mesh Bandpass Filters With Diamond-Shaped Apertures for Sensitive THz Receivers

In this letter, we present high-performance terahertz (THz) metal-mesh bandpass filters developed to mitigate direct detection effects in sensitive THz receivers based on superconducting hot-electron bolometer (HEB) mixers. These metal-mesh filters are freestanding 5-μm-thick sheets of copper perforated with a periodic array of diamond-shaped apertures. The simple aperture design minimizes the effect of fabrication (rounding) errors on filter performance, allowing precise engineering of the center frequency (1.5–5.5 THz) while maintaining high (>90%) peak power transmission at normal incidence and a relatively narrow bandwidth of 5%–15%. Based on finite-element method simulation results, we provide simple design equations that can be used for rapid design with high accuracy. The measured transmission profiles of 1.9-, 2.5-, and 4.7-THz filters show excellent agreement with the simulation results. These filters are compatible with cryogenic operation and can substantially reduce the direct detection effects in HEB mixers.

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来源期刊

IEEE Transactions on Terahertz Science and Technology ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

7.10

自引率

9.40%

发文量

102

期刊介绍： IEEE Transactions on Terahertz Science and Technology focuses on original research on Terahertz theory, techniques, and applications as they relate to components, devices, circuits, and systems involving the generation, transmission, and detection of Terahertz waves.