About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Discovery and Design of Emerging Materials
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Presentation Title |
First-principles Theory of Nonlinear Optical Responses in 2D Materials and Topological Materials |
Author(s) |
Xiaofeng Qian |
On-Site Speaker (Planned) |
Xiaofeng Qian |
Abstract Scope |
Strong nonlinear optical responses were recently observed in 2D materials and topological materials. Understanding the underlying microscopic mechanisms is important for advancing nonlinear optics. Here I will present our recent effort in developing first-principles approaches to unveil the electronic structure origin of nonlinear optical responses, including second harmonic generation and nonlinear photocurrent in noncentrosymmetric2D materials, and nonlinear ferroelectric photocurrent in topological materials. I will discuss microscopic relations between nonlinear responses and topological quantities such as shift vector, Berry curvature dipole, etc. Our findings suggest the possibility to achieve deep understanding of nonlinear optical responses in 2D materials using first-principles approaches. This research was supported by the National Science Foundation (NSF) under award number NSF DMR-1753054. References: [1] Hua Wang and Xiaofeng Qian. Nano Letters 17, 50275034 (2017). [2] Hua Wang and Xiaofeng Qian. arXiv:1811.03133 (2018). [3] Hua Wang and Xiaofeng Qian. Nonlinear Ferroelectric Photocurrent in Topological Materials, in preparation (2018). |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |