外文题目: Enhancement of Absorption in Graphene Strips With Cascaded Grating Structures
作者: Wu, Jun
刊名: IEEE Photonics Technol. Lett.
年: 2016 卷: 128 期: 12 页： 1332--1335
英文关键词:
Diffraction; gratings; optical resonance
PLASMONICS; PHOTODETECTOR; PHOTONICS; RESONANCE; ABSORBER
英文摘要:
The enhanced absorption effects of graphene strips with cascaded grating structures are investigated. A graphene absorber, which consists of a graphene grating and a dielectric grating backed with a Bragg grating, is designed and studied. The combined effects of guided-mode resonances with dielectric gratings and the photonic bandgap with a Bragg grating lead to the realization of critical coupling, which makes the absorber exhibit near-unity absorption/emission at resonance but with ultra-narrow spectral and antennalike responses. Both the coupled-mode theory and the electric-field distributions are presented to provide a physical understanding of such an absorption behavior. We believe that the conclusions may be useful for the design of graphene-based optoelectronic devices.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1109/LPT.2016.2541691


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