石墨烯
光学
材料科学
光子晶体
反射(计算机编程)
光电子学
奇偶性(物理)
物理
原子物理学
纳米技术
计算机科学
程序设计语言
作者
Wei Xu,Qilin Hong,Jialong Peng,Ping Liu,Biao Yang,Chucai Guo,Zhihong Zhu
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2023-10-24
卷期号:48 (22): 5963-5963
被引量:1
摘要
We propose a type of reflectionless graphene perfect absorber (GPA) in which the reflection channel is forbidden, while the transmission channel is open. Peak absorption of 99.97% in the near-infrared is numerically demonstrated for monolayer graphene loaded on a one-dimensional silicon photonic crystal slab with rhomboid cross sections that supports parity symmetric unidirectional guided resonances (UGRs). Based on the proposed GPA, a transmissive optical modulator with a modulation depth of about 28 dB and an insertion loss of 0.31 dB by varying the Fermi energy level graphene from 0.3 eV to 0.7 eV is numerically presented. Remarkably, the design strategy can be straightforwardly applied to other two-dimensional (2D) materials. Our study may find promising applications in 2D material-based optical modulators and filters.
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