精密光学工程技术研究所王占山和程鑫彬团队王绪泉、马志远等人在《Royal Society Open Science》杂志上发表题为“Rapid species discrimination of similar insects using hyperspectral imaging and lightweight edge artificial intelligence”的文章。昆虫物种的鉴别是生态学和生物多样性研究的一个重要方面。基于人类视觉经验和生化分析的传统方法无法兼顾准确性和及时性。利用计算机视觉和机器学习进行形态识别有望解决这...
In this lecture, I'll introduce photoemission spectroscopy and its applications in quantum materials research. The lecture begins with an introduction to electronic band structure, the basic working principles of photoemission spectroscopy, and its early use in material research. Later, I'll present state-of-the-art photoemission equipment and recent studies using these tools. The goal of this lecture is to provide a comprehensive overview of photoemission spectroscopy in condensed matter physics.
This lecture will review the recent progress in investigating a spontaneous build-up of macroscopic coherence in non-resonantly pumped semiconductor microcavities. Because of the strong interaction between excitons and cavity mode, the hybrid particles called polaritons appear. Inheriting high mobility and strong interactions from their constituents, these particles demonstrate superfluid behavior accompanied by spontaneous nucleation of vortices. I will describe experimental approaches for creation and manipulation of such peculiar structures including spatial confinement techniques. In addition, I will present a theoretical framework capable of explaining a number of recent experimental findings.
This lecture will provide an introductory overview of optical spectroscopy techniques and their applications in the study of two-dimensional (2D) quantum materials. As the field of 2D materials has rapidly expanded, understanding their unique optical and electronic properties has become important for advancing quantum science. We will begin with a basic review of key concepts in linear and nonlinear optical spectroscopies. Participants will gain insights into recent breakthroughs in the field, including moiré excitons and twist angle dependent tunable optical properties in twisted semiconducting bilayers. This session is designed for undergraduate students who are new to the field of 2D quantum materials and seek a comprehensive introduction to the application of optical spectroscopy in this cutting-edge area of research.
