文献类型：期刊文献

英文题名：Aligned Fiber Induced Laser-Driven Bamboo Diffuser Enabling Highly Directional Illumination Applications

作者：Zhang, Jie[1] Zhang, Lei[1] Meng, Yuan[1] Chen, Xueqi[1] Chang, Liang[1] Guo, Wenjing[1] Wang, Yuchen[1] Tang, Qiheng[1]

通信作者：Tang, QH[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, 1 Dongxiaofu, Beijing 100091, Peoples R China

年份：2024

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20250117628049);Scopus(收录号：2-s2.0-105002485481);WOS:【SCI-EXPANDED(收录号:WOS:001385278800001)】；

基金：The authors acknowledge the financial support provided by the National Key Research and Development Program (2023YFD2201404), the Young Top-notch Talents of the National Forestry and Grassland Administration (2022132007) and the Special Fund of the Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes (CAFYBB2023MB021).

语种：英文

外文关键词：directional illumination; laser-driven bamboo diffuser; light-scattering; natural bamboo

摘要：Directional optical diffusers provide customizable spatial intensity light distributions and have potential applications in next-generation directional lighting devices. The manufacturing procedures for directional lighting devices suffer from insufficient directionality, complex manufacturing conditions, and unsustainability. Herein, bamboo is processed directly into a directional laser-driven bamboo diffuser (LDBD) by delignification and subsequent impregnation with a polymer (poly(ethylene glycol)diacrylate and epoxy acrylate) with a mismatched refractive index. The LDBD shows a distinctly elliptical directional light distribution under laser irradiation. Then, a bright, efficient, and tunable white directional lighting from Y3Al5O12:Ce3+ (YAG: Ce)-added LDBDs is obtained by regulating the power of a 450 nm laser and YAG: Ce concentration. Optimal white lighting by the LDBD is obtained at a power of 400 mW and 1% YAG: Ce concentration. This provides standard white CIE 1931 chromaticity coordinates (0.33, 0.33), suitable correlated color temperature (5406 K), and high color rendering index (81.2%). Furthermore, the optimized bamboo diffuser exhibits satisfactory mechanical properties, as well as long-term thermal and water resistance. Due to the unique materials design and facile fabrication strategy, LDBD shows promise for optical fiber-guided, non-contact, long-distance, undersea, and other highly directional laser lighting applications.