A graphene-based tunable guided-mode resonance narrowband mid-infrared filter

A graphene-based tunable guided-mode resonance narrowband mid-infrared filter
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一种基于石墨烯的可调谐导模谐振窄带中红外滤波器

DOI:
10.1142/s0217984918502275
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发表时间:
2018-07
期刊:
World Scientic
影响因子:
--
通讯作者:
Sujuan Feng
Sujuan Feng
中科院分区:
其他
文献类型:
--
作者:
Yanlin Liao;Yan Zhao;Wen Zhang;Sujuan Feng

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我们报道了一种基于石墨烯的可调谐超窄带中红外滤光片,通过将费米能级从0.2 eV调谐到0.6 eV,可以将其从4.45122 [公式:见正文]m调谐到4.44675 [公式:见正文]m。此外,反射带宽小于0.2nm,反射率大于0.55。基于导模共振(GMR)效应设计了超窄带滤波器。反射峰的位移主要是由石墨烯介电常数的真实的部分的变化引起的。这种可调谐超窄带中红外滤光片可应用于中红外显微镜。
We report a graphene-based tunable ultra-narrowband mid-infrared filter which can be tuned from 4.45122 [Formula: see text]m to 4.44675 [Formula: see text]m by tuning the Fermi level from 0.2 eV to 0.6 eV. Furthermore, the reflection bandwidth is less than 0.2 nm and the reflection rate is more than 0.55. The ultra-narrowband filter is designed based on the guided-mode resonance (GMR) effect. The shift of reflection peak is mainly caused by the change of the real part of the graphene’s permittivity. This tunable ultra-narrowband mid-infrared filter can be applied in the mid-infrared microscopy.
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