Ultrafast photonics - new frontier in science and technology

超快光子学——科技新前沿

• 批准号: RGPIN-2016-04179
• 负责人: Bhardwaj, Ravi
• 金额: $ 2.4万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=645401
• 关键词: Ultrafast; photonics; new; frontier; science

Investigation of physical processes occurring on natural time and length scales is one of the greatest challenges in science and is the focus of my research in ultrafast photonics at university of Ottawa. ******In nature, electron motion is responsible for energy conversion in a photochemical process. However, tracking it has been beyond the scope of the existing tools until recently because electrons move on attosecond time scale. Also, when material dimension is reduced to nanometers, it exhibits significantly different physical, chemical, electrical and optical properties compared to the bulk. Nanostructured materials have several potential applications but existing techniques do not provide the ability to control and modify material properties in 3D with sub-micron precision. My research conducted at the extreme limits of space and time addresses these two challenges. ******Employing state-of-the-art laser technology we propose: (i) to produce light bullets comparable in duration to electron motion and use them to probe electron dynamics in complex molecules – a high speed burst mode photography. (ii) to use light as an ultrahigh precision machining tool to manipulate material properties by confining it to nanometer dimensions in solids. ******The proposed research in ultrafast photonics will lead to the development of next generation imaging, diagnostic and fabrication tools. This will enable us to image ultrafast processes in atoms/molecules. Unraveling electron dynamics enables control of photochemical processes that play a pivotal role in chemistry and biology. It is also important for emerging technologies like nano- and bio-photonics, and molecular electronics. In solids, uncovering the underlying physics of light-matter interaction enables control and optimization of process parameters that will enhance the efficiency of the manufacturing process. It also enables fabrication of novel embedded photonic devices and sensors. Technologically, it opens new vistas for photonics-related technologies that will enhance safety and security of Canadians and facilitate innovation in industry.

对自然时间和长度尺度上发生的物理过程的调查是科学中最大的挑战之一，也是我在渥太华大学超快光子学研究的重点。 *****在自然界中，电子运动负责光化学过程中的能量转换。但是，直到最近，跟踪它已经超出了现有工具的范围，因为电子在Attosendipe范围内移动。同样，当材料尺寸降低到纳米时，与整体相比，它表现出明显不同的物理，化学，电和光学特性。纳米结构材料具有多种潜在的应用，但现有技术并不能提供以亚微米精度控制和修改3D材料特性的能力。我的研究以时空的极限进行了，解决了这两个挑战。 *****使用最先进的激光技术，我们提出：（i）生产持续时间与电子运动相当的灯泡并使用它们来探测复杂分子中的电子动力学 - 高速爆发模式摄影。 （ii）将光作为超高精度加工工具通过将材料限制在固体中的纳米尺寸中来操纵材料。 *****拟议的超快光子学研究将导致下一代成像，诊断和制造工具的发展。这将使我们能够在原子/分子中成像超快过程。阐明电子动力学可以控制化学和生物学中起关键作用的光化学过程。对于纳米和生物光谱和分子电子等新兴技术也很重要。在固体中，揭示了光结合相互作用的基本物理，可以控制和优化过程参数，从而提高制造过程的效率。它还可以制造新型嵌入的光子设备和传感器。从技术上讲，它为光子学相关技术开辟了新的远景，这些技术将增强加拿大人的安全和保障，并促进工业的创新。