相关实验视频

Updated: May 6, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

基于索尔兹伯里效应的离子凝-石墨烯混合物的可调节的太赫兹吸收

Qiannan Li, Linyu Mei, Kaixi Bi

|April 4, 2024

概括

这项研究介绍了一种使用石墨烯的易于制造,电调节的太赫兹 (THz) 吸收器. 该设备通过电气门实现可调节的THz吸收率从60%到99%,显示出各种应用的前景.

科学领域:

材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学
光电学是指光电子产品.

背景情况:

石墨烯可调节的吸收特性是太赫兹 (THz) 吸收器的理想选择.
挑战包括石墨烯模式的困难和需要高电场的低内在吸收率.

研究的目的:

为了呈现一个电气调节的石墨烯THz吸收器与一个易于制造的索尔兹伯里屏幕结构.
为了证明使用电气门的石墨烯有效的载体密度调整.

主要方法:

三层结构的制造:石墨烯,聚胺 (PI) 介电,和金反射器.
电门 (-5V到5V) 使用离子凝层调整石墨烯的载体密度和费米能量水平 (E_F).
通过拉曼光谱确认E_F调制,通过THz时间域光谱学 (THz-TDS) 确认吸收率变化.

主要成果:

实现了可调节的THz吸收率,范围为60%至99%.
调整后的石墨烯的E_F在0-0.5 eV范围内.
证明高峰吸收率 (>95%) 即使在不同的曲率下.
研究了PI介电层厚度和共振频率之间的相关性.

结论:

拟议的石墨烯THz吸收器很容易制造和电气调节.
它表现出极好的性能,具有广泛的吸收率调制和高峰值.
在通信,医学和传感领域的潜在应用.

更多相关视频

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

Published on: February 1, 2022

相关概念视频

IR Absorption Frequency: Hybridization

IR Absorption Frequency: Hybridization

Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...