Planar photonic crystals for ultra-broadband ultrasound detection and generation

用于超宽带超声检测和生成的平面光子晶体

• 批准号: 1509504
• 负责人: Miao Yu
• 金额: $ 39.97万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509504&HistoricalAwards=false
• 关键词: Planar; photonic; crystals; ultra; broadband

Ultrasound plays an important role in many applications, including health care (e.g., clinical diagnostics, medical therapy, and surgery) and industrial monitoring (e.g., non-destructive detection and material characterization). In all these applications, transducers are critically needed for detection and generation of ultrasound. However, the current ultrasonic transducers are limited in detectability, spatial resolution, and bandwidth, which seriously hinder the performance of existing ultrasonic techniques. This award will support fundamental research on novel artificially designed low-dimensional periodic photonic structures (i.e., planar photonic crystals) for ultrasound detection and generation. This work is expected to open up new avenues for the development of novel ultrasound transducers, which can potentially overcome the fundamental limitations encountered with conventional ultrasonic technologies. Various disciplines including physics, material science, and medicine are expected to benefit from different facets of the proposed research. This award is expected to help create a new generation of students equipped with knowledge of emerging technologies in nanophotonics and advanced materials. In addition, this award will also help broaden the participation of underrepresented groups in research and enrich the learning experience of students with innovative projects in an interdisciplinary curriculum integrated with the research findings.Through combined analytical, numerical, and experimental studies, the overall goal of this work is to achieve a fundamental understanding of the photonic-acoustic responses and slow light effect in planar photonic crystals (PPCs), and to use this understanding to develop novel PPC based transducers with significantly enhanced performance and capabilities for ultrasound detection and generation. This research is expected to enrich the knowledge in the growing field of nanophotonics and lead to new methodologies for ultrasound detection and generation with PPCs. The unique properties of PPCs, including high quality factor (Q-factor) resonance, multimode photo-mechanical response, and immunity to thermal interference, will be investigated. These properties give PPCs a clear advantage over existing ultrasonic sensors for ultrasound detection. The award will lead to the development of a new class of PPC based ultrasonic sensors with capabilities of ultra-broadband detection, high sensitivity, and high spatial-resolution. Furthermore, the slow light effect in PPCs for enhancing light-matter interactions will be investigated; this will enable the development of novel PPC based ultrasound generators with significantly enhanced energy transfer efficiency. In addition, this award is expected to lead to the development of a novel optical fiber based nano-imprinting technique, for enabling scalable, inexpensive, and high-precision batch fabrication of on-fiber PPC devices and on-chip PPC arrays.

超声波在许多应用中起着重要的作用，包括医疗保健（例如临床诊断，医疗疗法和手术）和工业监测（例如，非破坏性检测和材料表征）。 在所有这些应用中，都需要换能器来检测和产生超声。 但是，当前的超声传感器在可检测性，空间分辨率和带宽方面受到限制，这严重阻碍了现有的超声技术的性能。该奖项将支持有关新颖的人工设计的低维周期光子结构（即平面光子晶体）进行超声检测和生成的基础研究。 预计这项工作将为开发新型超声传感器的开发开辟新的途径，这些途径可能会克服传统超声技术遇到的基本局限性。预计包括物理学，材料科学和医学在内的各种学科将受益于拟议研究的不同方面。 预计该奖项将有助于创建新一代的学生，并配备了有关纳米光学和高级材料中新兴技术的知识。 In addition, this award will also help broaden the participation of underrepresented groups in research and enrich the learning experience of students with innovative projects in an interdisciplinary curriculum integrated with the research findings.Through combined analytical, numerical, and experimental studies, the overall goal of this work is to achieve a fundamental understanding of the photonic-acoustic responses and slow light effect in planar photonic crystals (PPCs), and to use this understanding开发具有显着增强的超声检测和生成能力的新型基于PPC的传感器。 预计这项研究将丰富纳米光学领域的知识，并通过PPCS进行超声检测和产生的新方法。 PPC的独特特性，包括高质量因子（Q-因子）共振，多模型机电响应以及对热干扰的免疫力。这些特性使PPC比现有的超声传感器具有明显的优势用于超声检测。 该奖项将导致开发一类新的基于PPC的超声传感器，具有超宽带检测能力，高灵敏度和高空间分辨率。此外，将研究PPC中的慢光效应，以增强光线相互作用。这将使基于PPC的新型超声发生器的发展具有显着提高的能量传递效率。此外，预计该奖项将导致开发一种新型的基于光纤的纳米压印技术，以实现可扩展，廉价且高精度的纤维上PPC设备和芯片PPC阵列的高精度批处理。