材料科学
锡
光电子学
吸收(声学)
光学
红外线的
调制(音乐)
氮化钛
波长
谐振器
氮化物
图层(电子)
纳米技术
物理
冶金
哲学
复合材料
美学
作者
Huan Jiang,Wenchang Zhu,Junhao Huang,Hui Zhang,Weiren Zhao
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-09-23
卷期号:47 (19): 5072-5072
被引量:1
摘要
Ultrathin titanium nitride (TiN) films have become a novel material flatform for constructing active metasurfaces in the near-infrared region. In this Letter, we numerically achieved the dual functions of switchable linear dichroism (LD) and tunable perfect absorption in a G-shape gold resonators/TiN film hybrid metasurface by gating ultrathin TiN films. As the carrier density of TiN decreases, the modulation depth for LD strength is about 70% at 1211 nm. Meanwhile, the response wavelength of perfect absorption (∼1) shifts to the blue by around 130 nm with a change of carrier density of 12%. Our proposed active metasurface with the capability of strength-switchable LD and wavelength-tunable perfect absorption has considerable potential in dynamic electro-optic modulation and flat photonic devices with reconfigurable functionalities.
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