Theoretical attosecond and strong field solid state physics

理论阿秒与强场固体物理

• 批准号: RGPIN-2018-04244
• 负责人: Brabec, Thomas
• 金额: $ 8.89万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=762617
• 关键词: Theoretical; attosecond; strong; field; solid

My proposal is centered around the interaction of intense laser light with solids at the intersection of ultrafast photonics, nanophotonics, and condensed matter physics. Part I of my proposal focuses on laser intensities below material damage threshold. Recently high harmonic generation (HHG) in solids was demonstrated experimentally. As harmonic radiation is emitted on a laser sub-cycle time scale (~femtosecond (fs)), it results in the emission of attosecond (asec) pulses. This has created the field of attosecond and strong field solid state physics. Over the past few years my theoretical work has substantially contributed to shaping this field. Part I of my proposal builds on these results which puts me in a very good position to continue making key contributions. More groups have started moving into the field; as time is of essence, I request 1PDF, PhD #1 and MSc #1 to conduct the suggested quantum theory research. It will be focused on key questions of practical and fundamental relevance. How can we make attosecond solid state radiation sources more efficient and therewith practically relevant? How can HHG in solids be used to develop new diagnostic methods for materials, such as measuring the valence electron density, and time resolving ultrafast processes, such as collective excitations? To answer these questions new theoretical tools and models will have to be developed. Among those, my research will drive forward (non-perturbative) many-body quantum dynamics which has remained one of the major challenges of theoretical physics. Part II is about applications of the microscopic particle in cell (MicPIC) method which solves classical many-body dynamics self-consistently with laser propagation. It allows us to bridge the microscopic and macroscopic dynamics of light matter evolution. MicPIC captures many-body Coulomb interaction and resulting correlation to all orders which is a unique capacity. This is important for laser material interaction at higher intensities where damage occurs and a classical solid density plasma is created. There is no other method that can model the resulting strongly coupled plasma dynamics correctly. Part of my proposal will be focused on understanding the importance of collisions and plasma nano-fields in laser material machining. This will result in optimization of laser manufacturing processes. The second part will be focused on nano-photonics and the enhancement of strong field and nonlinear processes through nano-antennas and nano-resonators. Although MicPIC was not developed for this purpose we found it well suited to model the nonlinear response of metallic nano-systems. I will use MicPIC to gain insights on topical problems such as plasmon enhanced HHG and nonlinear optics which cannot be reliably modeled by any other approach. Due to the uniqueness of MicPIC there is less time pressure. This is why I request PhD #2 and MSc #2 for part II and no PDF.

我的建议集中在超激光光子学，纳米光子和凝结物理物理学的交点上强烈激光与固体的相互作用。我的提案的第一部分着重于低于物质伤害阈值的激光强度。最近在实验中证明了固体中的高谐波产生（HHG）。随着谐波辐射以激光亚周期时间尺度（〜pytsecond（FS））发射，它导致attsecond（ASEC）脉冲的发射。这创造了Attosend and strong Field固态物理学领域。在过去的几年中，我的理论工作为塑造这一领域做出了重大贡献。我的提案的第一部分基于这些结果，这使我处于继续做出关键贡献的好位置。越来越多的小组开始进入该领域。由于时间至关重要，我要求1PDF，PhD＃1和MSC＃1进行建议的量子理论研究。它将集中在实用和基本相关性的关键问题上。我们如何才能使Attsond固态辐射源更加高效，并且实际上相关？如何使用固体中的HHG开发用于材料的新诊断方法，例如测量价电子密度和时间解决超快过程，例如集体激发？要回答这些问题，必须开发新的理论工具和模型。其中，我的研究将推动前进（非扰动）多体量子动力学，这仍然是理论物理学的主要挑战之一。 第二部分是关于微观粒子在细胞（MICPIC）方法中的应用，该方法可以通过激光传播自兼而有地解决经典的多体动力学。它使我们能够桥接光质演化的显微镜和宏观动力学。 MICPIC捕获了多体库仑相互作用，并与所有订单相关，这是独特的能力。这对于在发生损坏的较高强度和创建经典固体密度等离子体的较高强度下的激光材料相互作用很重要。没有其他方法可以正确对产生的强耦合等离子体动力学进行建模。我的一部分提案将集中于了解激光材料加工中碰撞和等离子体纳米田的重要性。这将导致优化激光制造过程。第二部分将集中在纳米量音上，并通过纳米 - 安南纳斯和纳米谐振剂对强场和非线性过程的增强。尽管不是为此目的开发MICPIC，但我们发现它非常适合对金属纳米系统的非线性响应进行建模。我将使用MICPIC来获得有关局部问题的见解，例如血浆增强的HHG和非线性光学器件，这些光学无法通过任何其他方法可靠地建模。由于MICPIC的独特性，时间压力的时间较小。这就是为什么我要求第二部分和没有PDF的PhD＃2和MSC＃2的原因。