Speckle with Classical and Entangled Photons for Sensing, Imaging and Communication

本研究的目的是探索光学散斑信息提取和利用的新方法。空间分集将用于光学散斑成像和通信。该方法是测量散斑模式作为位置的函数，并将数据纳入空间强度相关模型。将开发适用于弱散射环境的光学散斑成像技术。该方法采用矢量贝特-萨尔皮特方程作为正演模型。将研究随机散射介质中纠缠光子的成像和通信。该方法利用量子纠缠的特性，对随机散射介质中的能量-时间纠缠光子进行测量。在散射介质内部和通过散射介质成像的方法在开发新的临床诊断工具、在气溶胶和乳剂内部和通过散射介质进行环境传感、在材料表征和通信中都很重要。这项工作将发展基本的认识，散射介质的模型，适合弱散射和强散射的成像方法，以及适合应用的表征方法。更广泛的影响这项工作将影响电磁频谱的其他部分以及其他波类型的应用。两名博士生将参与研究，每年将招收一名本科生。这项工作有可能通过普渡大学社区服务工程项目影响小学科学，本科生正在开发实践项目来教授重要原则，并为工程女性提供示范。

The objective of this research is to investigate new ways of extracting and using information in optical speckle. Spatial diversity will be used for imaging and communication with optical speckle. The approach is to measure speckle patterns as a function of position and incorporate the data in a spatial intensity correlation model. Imaging with optical speckle suitable in a weakly scattering environment will be developed. The approach is to use a vector Bethe-Salpeter equation as the forward model. Imaging and communication with entangled photons in random scattering media will be studied. The approach is to use measurements of energy-time entangled photons in random scattering media, exploiting features of quantum entanglement. Intellectual MeritMethods to image within and through scattering media are important in the development of new clinical diagnostic tools, in environmental sensing within and through aerosols and emulsions, in material characterization, and in communication. The work will develop basic understanding, models for the scattering media, an imaging method suitable for weak and strong scatter, and characterization methods suitable for applications. Broader ImpactsThe work will impact applications with other segments of the electromagnetic spectrum, as well as other wave types. Two Ph.D. students will participate in the research, and an undergraduate student will be recruited each year. The work has the potential to impact elementary school science through the Purdue Engineering Projects in Community Service program, where undergraduate students are developing hands-on projects to teach important principles, and also provide demonstrations for the Women in Engineering.