arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2407.14036physics.optics
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超紧凑光束转向纳米激光器

Ultra-compact beam steering nanolasers

Xinghong Chen, Mingxuan Gu, Jiankai Tang, Yungang Sang, Bingrui Xiang, Kong Zhang, Guanjie Zhang, Xingyuan Wang, Xuhan Guo, Linjie Zhou, Wengang Wu, Yifei Mao

AI总结:

本研究提出一种基于相变材料在连续体束缚态间进行模式选择的超紧凑光束转向纳米激光器,在25微米尺寸内同时实现光产生与33°光束转向,并具备296纳米波长调谐能力,为动态光控制提供新思路。

摘要:

光束转向器件的微型化和集成化一直是该领域的焦点。传统方法通过调节折射率来改变光学腔的本征模式。由于光学系统的非线性效应较弱,器件必须足够大才能实现充分的光调制。目前用于光束转向器件微型化的有效方法是基于超表面。然而,这类器件需要输入激光源,这排除了在单个器件中同时产生和控制光的可能性。在此,我们提出一种微型化光束转向器件,它通过相变材料在不同连续体束缚态(BIC)之间进行模式选择。该器件能够在仅25微米大小的单个器件中同时实现光产生和光束转向(33°),且具有8.9 kW cm-2的低阈值。此外,它还能实现显著的动态波长可调性,调谐范围高达296纳米。该方法通过动态控制系统的拓扑电荷来实现对光特性的高效调控,规避了传统方法中非线性弱的问题。进一步地,将相变材料与纳米激光器集成能够直接改变激光特性,为动态光控制提供了新思路。基于相变材料的器件工艺方案简单、直接且高度兼容,这将有利于其预期应用。

英文摘要:

The miniaturization and integration of beam steering devices have consistently been the focus of the field. Conventional methods alter the eigenmode of the optical cavity by regulating the refractive index. Due to the weak nonlinear effect of the optical system, the device must be sufficiently large to achieve sufficient light modulation. The effective method for miniaturizing beam steering devices currently in use is based on metasurfaces. However, this type of device necessitates the input of a laser source, which precludes the simultaneous generation and control of light in a single device. Here we propose a miniaturized beam steering device that employs mode selection between different bound states in the continuum (BIC) states through phase change material. The device is capable of simultaneously achieving both light generation and beam steering (33°) in a single device with a size of only 25 μm and with a low threshold of 8.9 kW cm-2. Furthermore,it is possible to achieve a significant degree of dynamic wavelength tunability, with a range extending up to 296 nm. This method achieves high-efficient regulation of light properties by dynamically controlling the system's topological charge, circumventing the problem of weak nonlinearity in traditional methods. Furthermore, the integration of phase change materials with nanolasers enables the direct alteration of lasing properties, which provides a novel idea for dynamic light control. The device process scheme based on phase change materials is straightforward, direct, and highly compatible, which will be advantageous for its intended application.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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