报告题目：Controlling light and heat with conducting polymers
报告人：Prof. Magnus Jonsson
邀请人：韩宇 教授
报告时间：2025年11月27日（周四） 15:00
报告地址：广州国际校区C2a-201
报告摘要：
Conducting polymers offer unique ways to control light and heat, which I will illustrate using recent examples from our research. I will first demonstrate their use to create a new type of dynamically tuneable optical nanoantennas.1-5 Such nanoantennas form the basis for important applications like optical metasurfaces, but they are traditionally static. By contrast, the optical response of conducting polymer nanoantennas can be tuned by varying the oxidation state of the polymer, opening for redox-tunable metasurfaces and applications like dynamically tunable flat lenses and video holograms. Next, I will show how the same type of electroactive polymers enables novel means for dynamic structural coloration for reflective displays.6-7 Such displays form an energy-efficient complement to emissive displays and provide additional benefits such as being suitable for use in bright light. Finally, I will present some of our work on radiative cooling by which the coldness of outer space enables passive cooling of objects on Earth via thermal radiation. I will focus on the use of conducting polymers to electrically tune the radiative cooling power, offering temperature regulation of objects by tuning their ability to radiate heat.8-11 The concept is based on modulating the infrared emissivity of our devices, which we also explore for adaptable camouflage and anticounterfeiting concepts.12
References
1. Conductive polymer nanoantennas for dynamic organic plasmonics. S. Chen et al. Nature Nanotechnology 2020, 15, 35-40.
2. Electrical Tuning of Plasmonic Conducting Polymer Nanoantennas. A. Karki et al. Advanced Materials 2022, 34, 13, 2107172
3. Doped Semiconducting Polymer Nanoantennas for Tunable Organic Plasmonics. A. Karki et al. Communications Materials 2022, 2022, 3, 48
4. Dynamic Conducting Polymer Plasmonics and Metasurfaces. S. Chen and M. P. Jonsson. ACS Photonics 2023, 10, 3, 571–581
5. Tuneable anisotropic plasmonics with shape-symmetric conducting polymer nanoantennas Y. Duan, et al. Advanced Materials 2023, 35, 51, 2303949.
6. Switchable Narrow Nonlocal Conducting Polymer Plasmonics. Lin et al. Nature Communications 2025, 16, 4484
7. Switchable thermal mid-IR conducting polymer antenna arrays Bandaru et al. Advanced Functional Materials, accepted
8. Dynamically tuneable reflective structural colouration with electroactive conducting polymer nanocavities. S. Rossi et al. Advanced Materials 2021, 33, 40, 2105004
9. Tunable structural color images by UV-patterned conducting polymer nanofilms on metal surfaces. S. Chen et al. Advanced Materials 2021, 33, 33, 2102451
10. Cellulose-based Radiative Cooling and Solar Heating Powers Ionic Thermoelectrics M. Liao, et al. Advanced Science 2023, 10, 2206510
11. Electrical Tuning of Radiative Cooling at Ambient Conditions D. Banerjee et al. Cell Reports Physical Science 2023, 4, 101274
12. Electrically tunable infrared optics enabled by flexible ion-permeable conducting polymer-cellulose paper. C. Kuang et al. npj Flexible Electronics 2024, 8, 55
报告人简介：
Magnus Jonsson is a professor of applied physics at Linköping University (LiU) in Sweden. He leads a research group focusing on organic photonics and nanooptics. The group is part of the Laboratory of Organic Electronics. Prof. Jonsson is also the director of a LiU centre for micro- and nanofabrication and co-director of a strategic focus area on advanced functional materials at LiU(SFO-Mat-LiU, AFM). He received his docent (habilitation) in organic electronics in 2016 and was appointed Wallenberg Academy Fellow in 2019 (with prolongation). He received a Swedish Research Council Consolidator grant in 2020 and an ERC Consolidator grant in 2023. His main research interests are to develop and study novel nanooptical concepts for application in sensors, displays, energy systems and smart materials. The group focuses particularly on exploring unique possibilities of organic materials for nanooptics, and recently introduced conducting polymers as a new type of materials for dynamic plasmonics.