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Lin Q, Zhai X, Su Y, Meng H, Wang L. Tunable plasmon-induced absorption in an integrated graphene nanoribbon side-coupled waveguide. APPLIED OPTICS 2017; 56:9536-9541. [PMID: 29216070 DOI: 10.1364/ao.56.009536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 10/30/2017] [Indexed: 06/07/2023]
Abstract
By designing a novel graphene plasmonic band-pass filter with two gold ribbons, we have numerically and analytically investigated the transmission properties of plasmon-induced absorption (PIA) in a compact graphene nanoribbon side-coupled waveguide. The formation and evolution of the PIA window are dependent on the superposition of super resonances and the near-field coupling intensity between the designed two resonators. Interestingly, the induced absorption window not only can be engineered longitudinally in intensity, but also dynamically tuned horizontally in the resonant wavelength by changing the Fermi energy of the graphene layers. Optical time delay near 1.0 ps can be realized in the PIA window, which exhibits excellent slow light features. Double PIA resonance is also discussed. This result may have potential applications in graphene plasmonic switching and buffering.
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Zhong N, Dai Q, Liang R, Li X, Tan X, Zhang X, Wei Z, Wang F, Liu H, Meng H. Analogue of electromagnetically induced absorption with double absorption windows in a plasmonic system. PLoS One 2017; 12:e0179609. [PMID: 28662059 PMCID: PMC5491032 DOI: 10.1371/journal.pone.0179609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 06/01/2017] [Indexed: 11/19/2022] Open
Abstract
We report the observation of an analog of double electromagnetically induced absorption (EIA) in a plasmonic system consisting of two disk resonators side-coupled to a discrete metal-insulator-metal (MIM) waveguide. The finite-difference time-domain (FDTD) simulation calculations show that two absorption windows are obtained and can be easily tuned by adjusting the parameters of the two resonance cavities. The consistence between the coupled-model theory and FDTD simulation results verify the feasibility of the proposed system. Since the scheme is easy to be fabricated, our proposed configuration may thus be applied to narrow-band filtering, absorptive switching, and absorber applications.
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Affiliation(s)
- Nianfa Zhong
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Qiaofeng Dai
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
- * E-mail: (QFD); (ZCW)
| | - Ruisheng Liang
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Xianping Li
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Xiaopei Tan
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Xiaomeng Zhang
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Zhongchao Wei
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
- * E-mail: (QFD); (ZCW)
| | - Faqiang Wang
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Hongzhan Liu
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
| | - Hongyun Meng
- Guangzhou Key Laboratory for Special Fiber Photonic Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangdong, China
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