(Peer-Reviewed) Dual quasi-BIC resonances synergized laser cooling in halide perovskite metasurface
Ying Che ¹ ², Peng Lu ³, Yang Li ¹ ², Junhao Zeng ¹ ², Mengxia Hu ¹ ², Fei Qin ¹ ², Tianyue Zhang ³ ⁴, Xiangping Li ¹ ²
¹ Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou 510632, China
中国 广州 暨南大学物理与光电工程学院光子技术研究院 广东省光纤传感与通信技术重点实验室
² International Cooperation Joint Laboratory for Optoelectronic Hybrid Integrated Circuits, Jinan University, Guangzhou 510632, China
中国 广州 暨南大学教育部光电混合集成电路国际合作联合实验室
³ School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, China
中国 北京 北京邮电大学集成电路学院
⁴ State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China
中国 北京 信息光子学与光通信国家重点实验室
Opto-Electronic Technology, 2026-03-20
Abstract
Halide perovskites, recognized for efficient upconversion photoluminescence and high quantum yields, present a promising platform for laser refrigeration. Their high refractive index further enables the design of nanostructures that support strong Mie-type resonances, leading to subwavelength light confinement and enhanced laser cooling performance.
In this work, we theoretically propose and numerically demonstrate a metasurface composed of nanostructured halide perovskite with tailored asymmetry, supporting dual-band quasi-bound states in the continuum (q-BICs) that simultaneously enhance optical excitation and upconversion photoluminescence. The perovskite metasurface exhibits a significant enhancement in optical absorption compared with the unpatterned perovskite film, along with a pronounced Purcell effect at the emission wavelength.
Thermodynamic modelling further indicates net cooling down to –201 °C from room temperature under continuous laser illumination, exceeding the liquid-nitrogen cooling threshold. These findings establish design principles for mechanically refrigerant-free thermal management and open a pathway toward integrated cryogenic photonic platforms.
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