Evanescent-field illumination for Terahertz biological imaging

用于太赫兹生物成像的倏逝场照明

• 批准号: 2137478
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2137478
• 关键词: Evanescent; field; illumination; Terahertz; biological

Terahertz (THz) radiation is radiation with a wavelength between 300 and 100 micrometres. It holds promise for imaging since it is nonionizing (unlike X-rays) and can penetrate through many optically opaque media. A limitation of free-space THz imaging is poor resolution compared to optical imaging. The industry standard technique for improving resolution is near-field raster-scanning which improves the resolution below the so-called diffraction limit to a few tens of micrometres. However, this improvement comes at the expense of time. This PhD research programme will look at evanescent-field illumination techniques (via total internal reflection and surface modes in periodic structures) along with state-of-the-art THz cameras to achieve an improved spatial resolution without the need for near-field raster scanning. Using a commercial all fibre-coupled Terahertz time-domain spectrometer and CW IMPATT diode sources along with a THz camera, the PhD student will design, model and implement a high-resolution THz microscope. The imaging capabilities of the microscope will be tested using biological samples.

太赫兹(THz)辐射是波长在300微米到100微米之间的辐射。它具有成像的前景，因为它是非电离的(不同于X射线)，并且可以穿透许多光学不透明的介质。与光学成像相比，自由空间太赫兹成像的一个限制是分辨率较低。提高分辨率的行业标准技术是近场栅格扫描，它将低于所谓的衍射极限的分辨率提高到几十微米。然而，这种改进是以时间为代价的。这项博士研究计划将着眼于逝去场照明技术(通过周期结构中的全内反射和表面模式)以及最先进的THz相机，以在不需要近场光栅扫描的情况下实现更高的空间分辨率。这位博士生将使用商用全光纤耦合太赫兹时域光谱仪和连续波IMPATT二极管光源以及太赫兹相机，设计、建模和实现高分辨率太赫兹显微镜。显微镜的成像能力将使用生物样本进行测试。

项目成果

Study of Leaky Waves Responsible for Terahertz TE Extroardinary Transmission

造成太赫兹 TE 非凡传输的漏波研究

• DOI: 10.1109/ucmmt47867.2019.9008325
• 发表时间: 2019
• 作者: Freer S

Peculiarities of Commercial PCA based THz Spectrometer Beam Profiling

基于 PCA 的商用太赫兹光谱仪光束分析的特点

• 发表时间: 2020
• 作者: A. Gorodetsky

Continuous Wave Sub-Terahertz Lensless Holographic Reflective Imaging

连续波亚太赫兹无透镜全息反射成像

• 发表时间: 2020
• 作者: A. Gorodetsky

Beam Profiling of a Commercial Lens-Assisted Terahertz Time Domain Spectrometer

• DOI: 10.1109/tthz.2020.3026656
• 发表时间: 2021-01-01
• 期刊: IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
• 影响因子: 3.2
• 作者: Freer, Suzanna;Gorodetsky, Andrei;Navarro-Cia, Miguel
• 通讯作者: Navarro-Cia, Miguel

Symmetry and Finite-Size Effects in Quasi-Optical Extraordinarily THz Transmitting Arrays of Tilted Slots

倾斜槽准光学特赫兹发射阵列的对称性和有限尺寸效应

• DOI: 10.1109/tap.2020.2985770
• 发表时间: 2020
• 期刊: IEEE Transactions on Antennas and Propagation
• 影响因子: 5.7
• 作者: Camacho M