Yang Xuekang, Lv Jiawei, Zhang Jing, Shen Tianxi, Xing Tingyang, Qi Fenglian, Ma Shaohua, Gao Xiaoqing, Zhang Wei, Tang Zhiyong
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Angew Chem Int Ed Engl. 2022 Jul 18;61(29):e202201674. doi: 10.1002/anie.202201674. Epub 2022 May 17.
Chiral semiconductor nanostructures have received enormous attention due to their emerging circularly polarized luminescence (CPL) properties. However, compared with well-studied photoluminescence (PL), the reported CPL is much weaker and more challenging to be modulated. Herein, we describe a new approach for acquiring the intense and tunable CPL from inorganic chiral photonic crystals (CPCs) doped with semiconductor quantum dots (QDs). Unprecedentedly, the sign, position and intensity of CPL peaks can be precisely controlled by manipulating either the photonic band gap of CPCs or luminescence wavelength of QDs and a giant absolute dissymmetry factor |g | up to 0.25 is obtained. More importantly, the origin of the CPL modulation is clearly elucidated by both experiment and theory. This work lays the foundation for the construction of next-generation high-performance CPL-based devices.
手性半导体纳米结构因其新出现的圆偏振发光（CPL）特性而受到了广泛关注。然而，与研究充分的光致发光（PL）相比，所报道的CPL要弱得多，并且调制起来更具挑战性。在此，我们描述了一种从掺杂半导体量子点（QDs）的无机手性光子晶体（CPCs）中获得强且可调谐CPL的新方法。前所未有的是，通过操纵CPCs的光子带隙或QDs的发光波长，可以精确控制CPL峰的符号、位置和强度，并且获得了高达0.25的巨大绝对不对称因子|g|。更重要的是，通过实验和理论都清楚地阐明了CPL调制的起源。这项工作为构建下一代基于CPL的高性能器件奠定了基础。
