UV-visible broadband wide-angle polarization-insensitive absorber based on metal groove structures with multiple depths

Wu Tao; Lai Jianjun; Wang Shaowu; Li Xiaoping; Huang Ying

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UV-visible broadband wide-angle polarization-insensitive absorber based on metal groove structures with multiple depths

机译：基于金属槽结构的UV可见宽带广角极化 - 不敏感吸收器，具有多种深度

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A new periodic Al groove structure coated by SiO2 thin film is designed and numerically investigated for wide-angle and polarization-insensitive broadband absorption. A metal groove array presents optical absorption enhancement due to the cavity mode resonance, with the absorption peak capable of being shifted by controlling the depth of the metal groove. Broadband absorption can be realized by a periodic array of metal grooves with different depths combined in one single period. A two-dimensional Al structure with four different grooves in each period is designed to realize polarization-insensitive broadband absorption from 220 nm to 800 nm with average absorption efficiency over 80% within the incident angle of 40 degrees. These wide-angle and broadband absorption structures can be applied in UV/visible-related biochemical sensors, solar cells, or photocatalysts. (C) 2017 Optical Society of America

机译：通过SiO 2薄膜涂覆的新的周期性铝槽结构，并对广角和极化不敏感的宽带吸收设计和数值研究。金属槽阵列具有由于腔模式共振引起的光学吸收增强，并且能够通过控制金属槽的深度而移动的吸收峰值。宽带吸收可以通过在一个单一时段内组合不同深度的金属槽阵列来实现。在每个时段中具有四个不同凹槽的二维Al结构被设计成从220nm到800nm的极化不敏感宽带吸收，其平均吸收效率在40度的入射角内超过80％。这些广角和宽带吸收结构可应用于UV /可见的生物化学传感器，太阳能电池或光催化剂。（c）2017年光学学会

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来源
《Applied optics》 |2017年第21期|共5页
作者
Wu Tao; Lai Jianjun; Wang Shaowu; Li Xiaoping; Huang Ying;
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Huazhong Univ Sci &

Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China;

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UV-visible broadband wide-angle polarization-insensitive absorber based on metal groove structures with multiple depths

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