材料科学
液晶
圆二色性
等离子体子
双折射
Crystal(编程语言)
纳米颗粒
卟啉
光电子学
光学
纳米技术
结晶学
物理
化学
光化学
程序设计语言
计算机科学
作者
Dorota Grzelak,Mateusz Zarzeczny,Mateusz Pawlak,Paweł Jarmuła,Atsushi Yoshizawa,Damian Pociecha,Wiktor Lewandowski
摘要
Chiral thin films showing electronic and plasmonic circular dichroism (CD) are intensively explored for optoelectronic applications. The most studied chiral organic films are the composites exhibiting a helical geometry, which often causes entanglement of circular optical properties with unwanted linear optical effects (linearly polarized absorption or refraction). This entanglement limits tunability and often translates to a complex optical response. This paper describes chiral films based on dark conglomerate, sponge-like, liquid crystal films, which go beyond the usual helical type geometry, waiving the problem of linear contributions to chiroptical electronic and plasmonic properties. First, we show that purely organic films exhibit high electronic CD and circular birefringence, as studied in detail using Mueller matrix polarimetry. Analogous linear properties are two orders of magnitude lower, highlighting the benefits of using the bi-isotropic dark conglomerate liquid crystal for chiroptical purposes. Next, we show that the liquid crystal can act as a template to guide the assembly of chemically compatible gold nanoparticles into 3D spiral-like assemblies. The Mueller matrix polarimetry measurements confirm that these composites exhibit both electronic and plasmonic circular dichroisms, while nanoparticle presence is not compromising the beneficial optical properties of the matrix.
科研通智能强力驱动
Strongly Powered by AbleSci AI