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摄影控制的超宽带超材料吸收器在太赫兹模式周围

Guozheng Wu^1,2, Chao Li^1,2, Dong Wang^1,2

¹School of Information Science and Engineering, University of Jinan, 250022, China. ise_lic@ujn.edu.cn.

Physical chemistry chemical physics : PCCP

|August 27, 2024

概括

研究人员使用开发了一种超宽带元材料吸收器. 该设备在广泛的太赫兹频谱中提供可调节的吸收,使先进光学技术的多功能应用成为可能.

科学领域:

光学和光子学在光学和光子学.
材料科学材料科学材料科学
电磁主义电磁主义

背景情况:

超材料吸收器对于控制电磁波至关重要.
基于的设备为太赫兹应用提供了潜力.
实现具有可调节特性的超宽带吸收仍然是一个挑战.

研究的目的:

设计和演示基于光导的超宽带元材料吸收器.
为了在广泛的太赫兹频谱 (6.6 THz) 中实现可调节的吸收.
为了实现反射和吸收状态之间的功能切换.

主要方法:

叠加光导的多个共振单元.
使用束调节电导率.
集成二氧化瓦纳用于双模式切换.
使用阻抗匹配理论和近场分析.

主要成果:

实现了超宽带吸收频谱,覆盖6.6 THz.
从完全反射切换到近乎完美的吸收.
通过温度和光束强度启用双模式切换 (双带和超宽带吸收).
在结构参数的变化,撞击角度和极化方面经过确认的坚固性.

结论:

拟议的基于的超材料吸收器显著扩大了吸收带宽.
该设备表现出多功能性,极化不敏感性和强度.
该设计为超宽带太赫兹吸收应用提供了一个有前途的平台.

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UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.