Time：10:30-12:00, Friday, January 10th, 2025

时间：2025年1月10日（星期五）上午10:30-12:00

Host: Prof. Ruihua HE, PI of School of Science, Westlake University

主持人: 西湖大学物理系PI 何睿华

Venue: E10-211, Yungu Campus, Westlake University

地点:云谷校区E10-211教室

Lecture Language: Chinese

讲座语言: 中文

Prof. Minghui Lu

Nanjing University

卢明辉教授

南京大学

Speaker:

Minghui Lu is a professor and doctoral supervisor at Nanjing University. He has been awarded the Outstanding Youth Fund of the National Natural Science Foundation of China, the National "Ten Thousand People Plan" for science and technology leaders, the first batch of young top talents of the Ministry of Organization of the Communist Party of China (MOOC), the Distinguished Professors of Jiangsu Province, and the Outstanding Talents of the New Century of the Ministry of Education of China, as well as other talent programs.

Abstract:

In recent years, due to their compact size and low transmission loss, solid-state elastic wave devices in the microwave frequency have gained widespread attention in emerging fields such as wireless communication, quantum acoustics, spintronics, and microwave photonics. To fully harness the potential of solid-state elastic waves, precise wave transmission control is crucial. Phononic crystal band engineering provides an effective means to control elastic wave transport, but fabrication defects and disturbances leading to backscattering limit their performance. Topological effects offer an effective solution to this issue. However, elastic waves in solids exhibit various propagation modes (such as longitudinal waves, transverse waves, Lamb waves, and surface acoustic waves), which complicates the design of topologically protected elastic wave devices. This report focuses on achieving precise control of various types of elastic waves within the frequency range of 10 KHz to 2 GHz and promoting the realization of novel elastic wave functional devices, through the theoretical design and experimental fabrication of macro- and micro-nanoscale elastic wave metamaterials. The report emphasizes the active monolithic integration technology of lithium niobate-based topological phononic crystals, which provides crucial support for the future development of acoustic integrated chip materials and devices.

讲座联系人/Contact:

School of Science, Zeyuan LI, Email: lizeyuan@westlake.edu.cn