A 40-to-330GHz Synthesizer-Free THz Spectroscope-on-Chip Exploiting Electromagnetic Scattering

📋 论文概要

该论文提出了一种40-330GHz的无合成器太赫兹片上光谱仪，利用电磁散射实现宽带频谱分析，避免了传统下变频架构中大量频率合成器和倍频器的需求。解决了太赫兹传感系统中高分辨率与宽带宽难以兼顾的问题。

💡 主要创新点

• 提出基于电磁散射的无合成器太赫兹光谱仪架构，无需传统LO合成器即可实现宽带频谱分析。
• 在40-330GHz范围内实现片上集成，利用电磁散射特性进行频率选择与检测。

🏷 关键词

📄 原文摘要

The terahertz band (0.3 to 3.0THz) has been found to be spectroscopically rich with many substances possessing strong and unique absorption signatures useful for chemical and biomedical sensing applications [1-4]. Photonics-based methods for spectrum analysis of the incident signal require complex time-domain spectroscopy systems achieving bandwidths more than 1THz but with resolution in GHz range. Classical solid-state down-conversion architectures can achieve much higher resolution but require a large bank of frequency synthesizers and multipliers to generate LO frequencies covering the entire band [1,2]. Evidently, enabling frequency generation on-chip covering the large frequency band (40 to 330GHz in this case) operating above fmax of the solid-state technology is impractical [3,4]. In the classical architecture, the incident signal is captured by a broadband antenna, and down-converted for spectral analysis [2]. The key concept in this

👥 作者与机构

Xue Wu, Kaushik Sengupta

Princeton University, Princeton, NJ