Seminar
| Date | 2025-03-07 |
|---|---|
| Time | 10 : 30 AM |
| Title | Controlling light and heat with conducting polymers |
[Seminar 개최안내]
■ 일시 : 2025년 3월 7일(금), 오전10시30분
■ 장소 : W1-1(신소재공학과_응용공학동), 2429호(제2세미나실)
■ 연사 : Prof. Magnus Jonsson (Linköping University)
■ 주제 : Controlling light and heat with conducting polymers
■ 주관 : 신소재공학과 신종화 교수
■ Abstract :
■ Abstract :
We have enhanced conducting polymers offer unique ways to control light and heat, which I will illustrate using recent examples from our research. I will first demonstrate that conducting polymers enable 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 dynamically 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.8-9 The concept is based on modulating the infrared emissivity of our devices, which also offer means for adaptable camouflage and anticounterfeiting.