25.3 A 40-to-330GHz synthesizer-free THz spectroscope-on-chip exploiting electromagnetic scattering
25.3 A 40-to-330GHz synthesizer-free THz spectroscope-on-chip exploiting electromagnetic scattering
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25.3 利用电磁散射的 40 至 330GHz 无合成器太赫兹片上光谱仪
DOI：
10.1109/isscc.2016.7418090
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Sengupta
中科院分区：
文献类型：
--
作者：
Xue Wu;K. Sengupta
已经发现太赫兹波段（0.3至3.0THz）在光谱上富含许多具有强烈和独特吸收特征的物质，可用于化学和生物医学传感应用[1-4]。基于光子学的入射信号频谱分析方法需要复杂的时域光谱系统，实现带宽超过1 THz，但分辨率在GHz范围内。经典的固态下变频架构可以实现更高的分辨率，但需要大量的频率合成器和乘法器来生成覆盖整个频带的LO频率[1，2]。显然，在固态技术的fmax以上实现覆盖大频带（在这种情况下为40至330 GHz）的片上频率生成是不切实际的[3，4]。
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].