报告时间：2026年9月2日（周三）早上10:30

报告地点：武汉大学电子信息学院（于刚宋晓楼）B603会议室

报告题目：On-Chip Functional Meta-Devices Enabled by Nanophotonic Cavities

报告人：董兆冈  教授

邀请人：梁国镇  教授

报告主题简介：

The multi-dimensional degrees of freedom of light, including spectral, polarization, phase, coherence, and momentum channels, provide a high-capacity basis for quantum and classical photonic information processing. Here, we present a suite of cavity-enhanced nanophotonic platforms that leverage local-density-of-optical-state modulation, high-Q/V resonances, and multipolar mode hybridization to realize higher-dimensional meta-devices with tailored emission and detection responses. For instance, we demonstrate tunable emission from Mie-resonant and hybrid dielectric–plasmonic nanocavities integrated with perovskite quantum dots, via Purcell effect. By exploiting Fano resonance, we achieve strong polarization anisotropy leading to deterministic linear-polarized single-photon emission. Furthermore, we utilize chiral near-field distributions of bi-layer metasurface to establish unidirectional and spin-selective emission channels. Meanwhile, on the detection front, we design ultra-compact photodetector pixels whose responsivity is governed by resonant field confinement and mode–material overlap, enabling wavelength-discriminatory detection in the visible. We further realize silicon photodetectors with enhanced near-IR absorption mediated by disorder metasurface and upconversion nanoparticles. Moreover, via exploring the thermoelectric properties of Sb₂Te₃ with structural resonance, we have realized an ultra-broadband detector that is able to operate from visible to mid-infrared region.

报告人简介：

董兆冈教授于2024年10月加入新加坡科技设计大学，现任副教授、博士生导师，并兼任新加坡科学技术研究局,材料研究与工程研究院及量子创新中心的首席科学家。主要从事纳米光学与量子光电子器件方向的研究，涵盖亚10纳米制造技术、介电纳米天线、等离子体光学、光电超构器件以及量子超导器件等领域。近年来，围绕纳米尺度的光-物质相互作用、超构表面功能器件集成及超导纳米器件开发等方向，迄今已在Nature Photonics、 Advanced Materials、ACS Nano、Science Advances、Nature Communications、Nano Letters等国际知名学术期刊发表高水平学术论文100余篇，并拥有4项PCT国际发明专利。此外，他曾获得2022年和2023年MTC个人科研基金，目前主持或参与10项在研科研项目。

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