Multicolor T‐Ray Imaging Using Multispectral Metamaterials,Advanced Science

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Multicolor T‐Ray Imaging Using Multispectral Metamaterials
Advanced Science ( IF 14.3 ) Pub Date : 2018-03-25 , DOI: 10.1002/advs.201700982
Zhitao Zhou _{1,

2} , Tao Zhou ₃ , Shaoqing Zhang ₄ , Zhifeng Shi ₅ , Ying Chen ₁ , Wenjian Wan ₃ , Xinxin Li _{1,

2,

6} , Xinzhong Chen ₇ , Stephanie N Gilbert Corder ₇ , Zhanglong Fu ₃ , Liang Chen ₅ , Ying Mao ₅ , Juncheng Cao _{2,

3} , Fiorenzo G Omenetto ₈ , Mengkun Liu ₇ , Hua Li _{2,

3} , Tiger H Tao _{1,

2,

4,

6}

Affiliation

Recent progress in ultrafast spectroscopy and semiconductor technology is enabling unique applications in screening, detection, and diagnostics in the Terahertz (T‐ray) regime. The promise of efficaciously operation in this spectral region is tempered by the lack of devices that can spectrally analyze samples at sufficient temporal and spatial resolution. Real‐time, multispectral T‐ray (Mul‐T) imaging is reported by designing and demonstrating hyperspectral metamaterial focal plane array (MM‐FPA) interfaces allowing multiband (and individually tunable) responses without compromising on the pixel size. These MM‐FPAs are fully compatible with existing microfabrication technologies and have low noise when operating in the ambient environment. When tested with a set of frequency switchable quantum cascade lasers (QCLs) for multicolor illumination, both MM‐FPAs and QCLs can be tuned to operate at multiple discrete THz frequencies to match analyte “fingerprints.” Versatile imaging capabilities are presented, including unambiguous identification of concealed substances with intrinsic and/or human‐engineered THz characteristics as well as effective diagnosis of cancerous tissues without notable spectral signatures in the THz range, underscoring the utility of applying multispectral approaches in this compelling wavelength range for sensing/identification and medical imaging.

中文翻译：

使用多光谱超材料进行多色 T 射线成像

超快光谱和半导体技术的最新进展使得太赫兹（T 射线）领域的筛选、检测和诊断的独特应用成为可能。由于缺乏能够以足够的时间和空间分辨率对样本进行光谱分析的设备，在该光谱区域有效操作的前景受到了影响。通过设计和演示高光谱超材料焦平面阵列 (MM-FPA) 接口，报告了实时多光谱 T 射线 (Mul-T) 成像，该接口允许在不影响像素大小的情况下实现多波段（和单独可调）响应。这些 MM-FPA 与现有的微加工技术完全兼容，并且在周围环境中运行时噪音低。当使用一组频率可切换量子级联激光器 (QCL) 进行多色照明测试时，MM-FPA 和 QCL 都可以调整为在多个离散太赫兹频率下运行，以匹配分析物“指纹”。提供了多功能成像功能，包括明确识别具有固有和/或人工设计的太赫兹特性的隐藏物质，以及有效诊断太赫兹范围内没有显着光谱特征的癌组织，强调了在这个引人注目的波长中应用多光谱方法的实用性适用于传感/识别和医学成像的范围。

更新日期：2018-03-25

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