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Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
Ultraviolet perfect absorption leveraging bound states in the continuum in an Al/SiO2 hybrid system
Jie Hu1,2, Yuting Wu1,2, Jianqi Zhu1,2
1Key Laboratory of Micro-Nano Optoelectronic Materials and Devices at Sichuan Normal University of Sichuan Province, Chengdu 610101, China. zhengjie@sicnu.edu.cn.
Abstract:
The bound states in the continuum (BICs), which are coupled resonances in a non-Hermitian system, are typically characterized by zero linewidth and an infinite resonance quality factor. These unique features facilitate various developments and applications in low-threshold lasers, ultrasensitive sensing, and highly efficient optoelectronics. Extensive research has been devoted to achieving near-perfect absorption leveraging BICs in the visible regime. For hybrid systems, it is a major issue to manipulate BICs in the ultraviolet regime. Moreover, there is currently a lack of near-perfect absorption leveraging BICs in the ultraviolet regime. Here, a kind of Al/SiO2 hybrid system is theoretically proposed to realize near-perfect absorption by motivating various types of BICs in the ultraviolet regime. In this work, the near-perfect absorption of 99.97% can be achieved in the Al/SiO2 hybrid system at the wavelength of 304.4 nm. Importantly, the BICs can be modulated into the ultraviolet regime by adjusting the geometric parameters and the incident light angles, and the Q factor of 1099.4 can be successfully obtained. This work builds a theoretical foundation to realize near-perfect absorption leveraging BICs for UV light detection.
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