报告地点：理学馆213学术交流室

报告时间：2024年11月9日（星期六）10:00-11:00

报告人：宋昊旻 助理教授

邀请人：邹雪翠 副教授

内容简介：

Light-matter interaction is a pivotal branch of photonics and optical science and engineering, offering groundbreaking advancements in the efficiency and functionality of optoelectronic devices. Central to this talk is a pioneering study that unveils a method for substantially enhancing optical absorption in ultra-thin films through planar nanocavities. This approach, characterized by a robust interference effect, adeptly navigates the traditional compromise between film thickness and optical absorption efficiency, laying foundational principles for the development of advanced energy harvesting and conversion technologies.

Expanding on this core discovery, this talk further explores its applications across various domains. We discuss the creation of single-crystalline germanium nanomembrane photodetectors that benefit from improved light absorption and distinctive optoelectronic traits, thanks to the nanocavity enhancement. Additionally, the talk covers the integration of MoS₂ monolayers with nanocavities to significantly bolster light-matter interactions, markedly optimizing the performance of ultra-thin 2D semiconductor materials in photonic devices. Lastly, we examine the use of ultrathin-film TiO₂ on nanocavities for the photocatalytic reduction of CO₂, showcasing enhanced catalytic activity and selectivity towards oxygenated hydrocarbons, which underscores the talk's focus on significant applications of nanocavity-enhanced light-matter interaction for sustainable energy solutions.

光-物质相互作用是光子学和光学科学与工程的关键研究重点，为光电器件的效率和功能方面提供了突破性进展。本次讨论的核心内容是一项开创性研究，揭示了一种通过平面纳米空腔大幅增强超薄膜光学吸收效果的方法。这种方法利用强大的干涉效应巧妙地解决了传统薄膜厚度和光吸收效率之间的折衷问题，并为先进能量收集和转换技术奠定了基础原则。在此基础上，本次讨论将进一步探讨该方法在各个领域中的应用。我们还将介绍单晶锗纳米膜光电探测器的创建过程，在纳米腔增强下，该探测器得益于改善后的光吸收和独特的光电特性。此外，讲座还包括MoS₂单层与纳米腔集成以显着增强其与光物质相互作用并优化超薄二维半导体材料在光子器件中表现出来性能方面所取得的成果。最后，我们还研究了使用超薄TiO₂膜在纳米空腔上进行CO₂光催化还原反应，并展示出对含氧碳氢化合物具有增强催化活性和选择性等特点，从而凸显出本次演讲重点即纳米空腔回路增强下 其在可持续能源解决方案中重要应用。

报告人简介：

Dr. Haomin Song is an Assistant Professor in the Institute of Applied Physics and Materials Engineering at the University of Macau. Previously, he served as a postdoctoral researcher in the Physical Science Engineering Division at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia. He embarked on his academic journey at Nankai University in China, progressing to graduate studies at the State University of New York (SUNY) at Buffalo in the US. After graduation, he assumed roles as a Research Assistant Professor and Postdoctoral Associate at SUNY at Buffalo. Beyond academia, he showcased his entrepreneurial ability as the Principal Investigator and Chief Technology Officer for Sunny Clean Water, LLC. His main research interests lie in the light harvesting and the energy conversion of light into electrical, thermal, chemical energies. He has authored and co-authored over 40 peer-reviewed papers in esteemed journals, including Advanced Materials, Nature Sustainability, Nature Communications, Advanced Science, PNAS, and Nano Energy. In recognition of his excellence in fundamental and applied research, he was awarded the travel grant for the Global Grand Challenges Summit, a prestigious event collaboratively organized by the National Academies of Engineering in US, UK and China.