Silicon photonic thermal photodetectors for mid-infrared sensing

用于中红外传感的硅光子热光电探测器

• 批准号: EP/W020254/1
• 负责人: Milos Nedeljkovic
• 金额: $ 44.12万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW020254%2F1
• 关键词: Silicon; photonic; thermal; photodetectors; mid

Mid-infrared (mid-IR) absorption spectroscopy is a well-known and versatile analytical technique for uniquely identifying and measuring the concentrations of gases, chemicals, and biological molecules by measuring which wavelengths of mid-IR light an analyte absorbs. Existing mid-IR absorption sensors are however either bulky and expensive (e.g. benchtop spectrometers), or have poor sensitivity and specificity (e.g. LED based sensors). Miniaturising such sensors could be transformative for diverse medical, industrial, and environmental sensing scenarios.High performance, low cost, and small spectroscopic sensors could be created using mid-IR optical circuits on silicon chips. These chips would ideally combine all of the required optical functions of the sensor (i.e. light source, waveguides for routing light, interaction between the light and the analyte, and light detection), and could be fabricated at low cost in high volumes, thanks to existing silicon manufacturing infrastructure that has been developed for electronics and for near-infrared optical communications.The last few years have seen rapid development of many of the components that are needed to create these sensor systems: silicon photonic waveguides that can transmit light with low loss at almost any mid-IR wavelength have been developed, while lasers emitting high powers in the mid-IR are now readily available and have been successfully integrated with silicon waveguides.However, there remains a crippling lack of practical photodetector technologies; those that have already been integrated wilth optical circuits on silicon chips are either expensive to manufacture, are impractical because they have to be cooled to cryogenic temperatures, or do not work at all required wavelengths. This project will develop new waveguide integrated thermal photodetectors, which work by converting the incoming light into a temperature change that can be measured with an electronic circuit. They will be able to operate at room temperature at any mid-IR wavelength, and will be manufactured using low cost techniques. This project will also demonstrate that sensors employing these photodetectors can reach the sensitivities required for clinical and industrial uses, by using them to measure low concentrations of artificial sweeteners in soft drinks - an industrially important example application. These detectors will potentially transform mid-infrared sensor systems from an academic curiosity into a commercially viable technology.

中红外（mid-IR）吸收光谱是一种众所周知的通用分析技术，用于通过测量分析物吸收的中红外光的波长来唯一地识别和测量气体、化学品和生物分子的浓度。然而，现有的中红外吸收传感器要么体积庞大且昂贵（例如台式光谱仪），要么具有差的灵敏度和特异性（例如基于LED的传感器）。微型化这种传感器对于各种医疗、工业和环境传感场景来说可能是革命性的。使用硅芯片上的中红外光学电路可以创建高性能、低成本和小型光谱传感器。这些芯片理想地将联合收割机结合传感器的所有所需光学功能（即，光源、用于路由光的波导、光与分析物之间的相互作用以及光检测），并且可以以低成本大量制造，由于现有的硅制造基础设施，已开发的电子和近，近几年来，已经看到了创建这些传感器系统所需的许多组件的快速发展：已经开发出可以在几乎任何中红外波长下以低损耗传输光的硅光子波导，而发射高功率中红外激光器现在已经很容易获得，并且已经成功地与硅波导集成在一起。然而，仍然严重缺乏实用的光电探测器技术;那些已经在硅芯片上集成了光学电路的器件或者制造昂贵，或者因为它们必须被冷却到低温而不切实际，或者在所有需要的波长下都不工作。该项目将开发新的波导集成热光电探测器，其工作原理是将入射光转换为可以用电子电路测量的温度变化。它们将能够在室温下在任何中红外波长下工作，并将使用低成本技术制造。该项目还将证明，采用这些光电探测器的传感器可以达到临床和工业用途所需的灵敏度，通过使用它们来测量软饮料中低浓度的人工甜味剂-这是一个重要的工业应用实例。这些探测器将有可能将中红外传感器系统从学术好奇心转变为商业上可行的技术。

项目成果

Mid-infrared SOI waveguide thermo-optic Fourier-transform spectrometer

中红外SOI波导热光傅立叶变换光谱仪

• DOI: 10.1117/12.2649189
• 发表时间: 2023
• 作者: Wei C

Group IV Mid-Infrared Photonic Devices and Applications

IV 族中红外光子器件和应用

• DOI: 10.1109/icton59386.2023.10207235
• 发表时间: 2023
• 作者: Rowe D

Sub-wavelength gratings in silicon photonic devices for mid-infrared spectroscopy and sensing

• DOI: 10.1016/j.photonics.2023.101223
• 发表时间: 2023-12-19
• 期刊: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
• 影响因子: 2.7
• 作者: Stirling，Callum J.;Nedeljkovic，Milos;Mashanovich，Goran Z.
• 通讯作者: Mashanovich，Goran Z.