Numerical Investigation of the Stimulated Growth of Single-Crystal Fibers by Point-Effect-Induced Fluid Dynamics
Numerical Investigation of the Stimulated Growth of Single-Crystal Fibers by Point-Effect-Induced Fluid Dynamics
复制标题
DOI：
10.1021/acs.cgd.2c00690
复制
发表时间：
2022-11
期刊：
影响因子：
--
通讯作者：
Jiezhao Lv;Changfeng Fang;Chengjie Zhu;Peng Sun;Yvonne Y. Li;B. Durbeej;Xian Zhao;Lu Deng
中科院分区：
文献类型：
--
作者：
Jiezhao Lv;Changfeng Fang;Chengjie Zhu;Peng Sun;Yvonne Y. Li;B. Durbeej;Xian Zhao;Lu Deng
利用分子动力学分析和考虑含时晶体表面化学反应的双组分扩散模型，我们通过大量的数值模拟表明，最近在单晶光纤中观察到的棱柱面生长抑制是由于晶体表面选择性的自屏蔽和由于光纤的小直径和大长宽比引起的点效应而产生的自沟道的共同作用。我们进一步表明，自沟道导致了金字塔定向的溶质流动，从而加速了单晶纤维的生长。这一介观受激物质生长加速理论可以令人满意地解释迄今报道的所有实验结果。这种新的晶体光纤生长技术为单晶光纤结构在芯片尺寸光子学中的应用开辟了可能的领域。
Using molecular dynamics analysis and a two-component diffusion model that accounts for the time-dependent crystal surface chemical reaction, we show by extensive numerical simulations that the recently observed prismatic facet growth suppression in single-crystal fibers is the combined action of self-shielding by crystal surface selectivity and self-channeling arising from a point effect due to fibers’ small diameters and large aspect ratios. We further show that the self-channeling leads to a pyramidal-face-aiming solute flow, resulting in accelerated single-crystal fiber growth. This mesoscopic stimulated matter growth acceleration theory can satisfactorily explain all experimental results reported to date. This new crystal fiber growth technology opens a realm of application possibilities for single-crystal fiber architectures in chip-size photonics.