Chen Quanliang, Tang Baolei, Ye Kaiqi, Hu Hanlin, Zhang Hongyu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street, Changchun, 130012, P. R. China.
Hoffman Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Shenzhen, 518055, P. R. China.
Angew Chem Int Ed Engl. 2025 Jan 27;64(5):e202417459. doi: 10.1002/anie.202417459. Epub 2024 Oct 31.
Flexible organic crystalline optical waveguides, which deliver input or self-emit light through various dynamic organic crystals, have attracted increasing attention in the past decade. However, the modulation of the waveguide output relies on chemical design and substituent modification, being time-consuming and laborious. Here we report an elastic organic crystal that displays long-distance light transduction up to 2.0 cm and an ultra-wide modulation of crystalline optical waveguides between red (645 nm) and near infrared (731 nm) in both the pristine and the elastically bent states based on a pre-designed self-absorption effect. The flexible organic crystalline optical waveguides can be precisely and reversibly reconfigured by controlling the irradiation point. In addition, deep-red amplified spontaneous emission (ASE) that is able to transduce through a 5.0 mm bent crystal with an ultra-low optical loss coefficient of 0.093 dB/mm has been attained. To the best of our knowledge, this is the first report of flexible organic ASE waveguides. The present study not only provides a simple yet effective strategy to remarkably modulate flexible organic crystalline optical waveguides but also demonstrates the superiority of lasing over normal emission as flexible optical communication elements.
柔性有机晶体光波导可通过各种动态有机晶体传输输入光或自发光，在过去十年中受到了越来越多的关注。然而，波导输出的调制依赖于化学设计和取代基修饰，既耗时又费力。在此，我们报道了一种弹性有机晶体，基于预先设计的自吸收效应，在原始状态和弹性弯曲状态下，该晶体都能实现长达2.0厘米的长距离光传导以及在红色（645纳米）和近红外（731纳米）之间对晶体光波导的超宽调制。通过控制照射点，柔性有机晶体光波导可以被精确且可逆地重新配置。此外，还实现了深红色放大自发辐射（ASE），其能够通过5.0毫米弯曲晶体进行传输，光学损耗系数超低，仅为0.093分贝/毫米。据我们所知，这是关于柔性有机ASE波导的首次报道。本研究不仅提供了一种简单而有效的策略来显著调制柔性有机晶体光波导，还展示了作为柔性光通信元件，激光相比于正常发射的优越性。
