Kazi Suraya, Bandaru Pravallika, Tang Haoran, Duan Yulong, Chen Shangzhi, Huang Fei, Jonsson Magnus P
Organic Photonics and Nanooptics group, Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Campus Norrköping SE 601 74 Sweden
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, South China University of Technology Guangzhou China.
J Mater Chem C Mater. 2024 Oct 2;12(43):17469-17474. doi: 10.1039/d4tc03038a. eCollection 2024 Nov 7.
Conducting polymers can be dynamically switched between being optically metallic (negative real permittivity) and dielectric (positive real permittivity) by varying their redox state. This has enabled nanoantennas with plasmonic resonances that can be reversibly turned on/off, opening for applications in dynamic metaoptics, reflective displays, and smart windows. However, previous reports on conducting polymer plasmonics were limited to p-type polymers. Here, we show that a highly conducting n-type polymer, called poly(benzodifurandione) (PBFDO), can also provide optically metallic properties and be used to make dynamic optical nanoantennas. The doped version of the polymer becomes metallic at wavelengths above around 700 nm, leading to plasmonic extinction peaks for nanodisks made from the material. These peaks can be reversibly switched off and on electrically or chemically by varying the doping level of the polymer. The study extends the field of dynamic polymer plasmonics to n-type materials and broadens the application areas of PBFDO.
通过改变氧化还原状态，导电聚合物可以在光学上呈现金属态（负实介电常数）和介电态（正实介电常数）之间动态切换。这使得具有等离子体共振的纳米天线能够可逆地开启/关闭，为动态超光学、反射式显示器和智能窗户等应用开辟了道路。然而，先前关于导电聚合物等离子体激元的报道仅限于p型聚合物。在此，我们表明一种称为聚（苯并二呋喃二酮）（PBFDO）的高导电n型聚合物也能提供光学金属特性，并可用于制造动态光学纳米天线。该聚合物的掺杂版本在波长约700 nm以上变为金属态，导致由该材料制成的纳米盘出现等离子体消光峰。通过改变聚合物的掺杂水平，这些峰可以通过电学或化学方式可逆地开启和关闭。该研究将动态聚合物等离子体激元领域扩展到n型材料，并拓宽了PBFDO的应用领域。
