基于合成维度拓扑外尔点的波长选择热辐射超构表面  

The 90th Anniverary of Acta Physica Sinica·COVER ARTICLE Wavelength-selective thermal emission metasurfaces based on synthetic dimensional topological Weyl points

作　　者：赖镇鑫 张也 仲帆 王强 肖彦玲 祝世宁[1] 刘辉[1] Lai Zhen-Xin;Zhang Ye;Zhong Fan;Wang Qiang;Xiao Yan-Ling;Zhu Shi-Ning;Liu Hui(Collaborative Innovation Center of Advanced Microstructures,State Key Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China;School of Physics,Southeast University,Nanjing 211189,China)

机构地区：[1]南京大学物理学院,固体微结构物理国家重点实验室,人工微结构科学与技术协同创新中心,南京210093 [2]东南大学物理学院,南京211189

出　　处：《物理学报》2024年第11期1-10,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12334015,92163216,92150302,62288101,12004072)资助的课题。

摘　　要：黑体辐射通常具有覆盖整个红外波长范围的宽带光谱,导致红外波段的大部分能量不能有效利用,降低了辐射效率.近年来,具有二维亚波长人工纳米结构的超构表面因其在调节光学特性方面的灵活性而得到广泛研究,这为调控热辐射提供了一个理想的平台.在超构表面中,采用合成维度方法为热辐射的精细调控开辟了新路径,尤其突显了超越传统三维体系的物理特性和丰富的拓扑物理.相比于在三维系统中探索物理现象,研究一维或二维系统更为可行和高效.合成维度的方法通过引入系统的结构或物理参数,为操控光子系统中的内在自由度提供了可能性.本文研究了利用合成维度方法实现波长选择热辐射.首先在超晶格模型中构建合成拓扑外尔点,通过角分辨热辐射谱(ARTES)对合成外尔锥进行实验表征,在实现了合理的波长选择热辐射的同时能够尽可能地抑制其他波长的辐射,对于实际的红外应用,如热光伏和热管理装置,是必不可少的.Blackbody emission such as the emission from incandescent sources usually possesses a broadband emission spectrum covering the whole infrared wavelength range.Most of emission energy goes into the unwanted infrared range and consequently causes low emission efficiency.Recently,metasurfaces with two-dimensional subwavelength artificial nanostructures have been widely studied due to their flexibility in modulating optical properties,thus providing an ideal platform for controlling thermal emission.The use of synthetic dimension methods in metasurfaces has opened up new avenues for fine-tuning thermal emission,especially highlighting the physical properties beyond traditional three-dimensional systems and rich topological physics.Although it is theoretically possible to explore physical phenomena through complete three-dimensional structures,such structures are difficult to construct in practice.In contrast,studying one-dimensional system or two-dimensional system is more feasible and efficient.The synthetic dimension approach introduces the possibility of manipulating intrinsic degrees of freedom in photon systems by introducing structural or physical parameters.In this work,we propose utilizing synthetic dimension methods to achieve wavelength-selective thermal emission.Firstly,we construct synthetic Weyl point in a superlattice model and validate it theoretically.Subsequently,experimental characterization of synthetic Weyl cones is conducted by using angle-resolved thermal emission spectroscopy(ARTES).The experimental results demonstrate that we can achieve reasonable wavelength-selective thermal emission while suppressing emission at other wavelengths as much as possible.This is essential for practical infrared applications such as thermalphotovoltaics and thermal management devices.

关 键 词：热辐射 超表面 超晶格 合成维度 

分 类 号：G63[文化科学—教育学]