期刊
OPTICS EXPRESS
卷 29, 期 19, 页码 29631-29640出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.434315
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资金
- National Research Foundation of Korea [2020R1A2B5B01002681, 2021R1A4A1033155]
- National Research Foundation of Korea [2020R1A2B5B01002681, 2021R1A4A1033155] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study introduces a novel perfect absorber design using guided-mode resonances for high absorption and enhanced fabrication error tolerance. The proposed scheme mimics a one-port system to achieve high absorption rates.
We proposed a novel perfect absorber with an asymmetric single resonator supporting two degenerate resonant modes, whose operation concept is mimicking a one-port system by making only one of the modes experience loss while using the other for an internal 100% reflector in conjunction with the background scattering. We confirmed the operation principle and the design requirement from a theoretical study using the temporal coupled-mode theory. We also designed an example device based on the guided-mode resonances (GMRs) in a slab-waveguide grating and numerically demonstrated a high absorption of similar to 99.95% in monolayer graphene with greatly enhanced fabrication error tolerance in comparison to the previously proposed scheme. Our proposed scheme will find various useful applications due to the intuitive design process and relatively easier fabrication, which is attributed to the one-port mimicking operation concept with a single GMR-based broadband flat-top reflector. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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