Optical waveform measurement for attosecond science and trace chemical detection

用于阿秒科学和痕量化学检测的光学波形测量

• 批准号: RGPIN-2019-06877
• 负责人: Hammond, Thomas
• 金额: $ 1.75万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=739159
• 关键词: Optical; waveform; measurement; attosecond; science

Attosecond science (1 as = 10-18 s), or attoscience, is uniquely capable of resolving the rapid motion of electrons in atoms and molecules. The principal aim of this proposal is to extend these laser-based techniques to study the motion of electrons in liquids and solids. These experiments will have a major impact in opening up a large frontier in light-matter interactions, namely quantum and nonlinear optics, photonics, electro-optics, condensed matter physics, and materials science. In addition, attoscience can be combined with other high spatial resolution techniques, such as atomic force microscopy (AFM), to resolve the motion of electrons in nano-engineered objects such as quantum wells, quantum dots, and nanotips. Our proposed technologies that have unprecedented sensitivity to attosecond electronic motion in external electric fields have potential applications not only for next-generation electronics, electrical engineering, and photonics, but also for molecular detection, standoff detection, and biosensing. The goal of my research group, the Attosecond Condensed Matter Experiments (ACME) laboratory at the University of Windsor, is to create and leverage these attosecond techniques and apply them to condensed matter to discover ultrafast processes, control electronic motion in engineered material, and develop new photonics technologies. In my lab, we will model, engineer, and exploit nonlinear processes in materials for attosecond pulse generation and detection. Although femtosecond (1 fs = 10-15 s) laser sources are commercially available, compressing these pulses to the attosecond regime is challenging, but essential for attoscience. We will investigate and develop these attosecond pulse sources in my group. Through strong-field laser pulses of just a few optical cycles, we will drive currents and follow electronic states to track electron dynamics. Furthermore, we will take advantage of the sensitivity of these highly nonlinear processes to perturbing fields as sensors for optical fields and to reconstruct optical waveforms, developing a novel tool for time-dependent infrared spectroscopy with unprecedented resolution. The increased sensitivity to perturbing fields can be leveraged with other established techniques such as atomic force microscopy (AFM) for attosecond time resolution at the nanoscale, an unprecedented combination of two disparate areas of research. Moreover, through this technique we will develop an enhanced spectroscopic measurement in the infrared, where molecular vibrational signatures can distinguish biological samples, which will be useful for remote sensing and medicine.

Attosond Science（1 = 10-18 s）或Attoscience具有独特的能力解决原子和分子中电子的快速运动。该建议的主要目的是扩展这些基于激光的技术，以研究液体和固体中电子的运动。这些实验将在打开光线相互作用的大型边界，即量子和非线性光学，光子学，电镜，冷凝物质物理学和材料科学方面产生重大影响。此外，Attoscience可以与其他高空间分辨率技术（例如原子力显微镜（AFM））结合使用，以解决纳米工程物体中电子的运动，例如量子井，量子点和纳米型。我们提出的对外部电场中对ATTSED电子运动的敏感性的敏感性不仅在下一代电子，电气工程和光子学方面具有潜在的应用，而且还针对分子检测，僵持检测和生物效应。我的研究小组的目的是温莎大学的Attosond Coldensed Matter实验（ACME）实验室，是为了创建和利用这些Attosend技术，并将其应用于凝结物质以发现超快过程，并在工程材料中控制电子运动，并开发电子运动，并新的光子技术。在我的实验室中，我们将建模，工程师并利用材料中的非线性过程，以生成脉冲和检测。尽管飞秒（1 fs = 10-15 s）的激光源可在市售中获得，但将这些脉冲压缩到Attosecond制度是挑战性的，但对于Attoscience至关重要。我们将在我的小组中调查并开发这些脉冲源。通过仅几个光学周期的强场激光脉冲，我们将驱动电流并遵循电子状态以跟踪电子动力学。此外，我们将利用这些高度非线性过程的敏感性来扰动磁场作为光场的传感器并重建光波形，开发出一种新颖的工具，用于使用前所未有的分辨率为时间依赖的红外光谱。可以利用其他已建立的技术（例如原子力显微镜（AFM））来利用对扰动场的敏感性提高，该技术在纳米级（Nanoscale）的AttSeent Time分辨率上，这是两个不同研究领域的前所未有的组合。此外，通过这种技术，我们将在红外线中开发增强的光谱测量，其中分子振动信号可以区分生物样品，这将对遥感和药物有用。