Dark and bright mode hybridization: From electric to magnetic Fano resonances |
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| Affiliation: | 1. Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;2. Università degli Studi di Genova, 16145 Genova, Italy;1. Department of Electrical and Electronics Engineering, Iskenderun Technical University, Iskenderun, Hatay, 31200, Turkey;2. Department of Computer Engineering, Faculty of Engineering and Architecture, Bozok University, Yozgat, 66200, Turkey;3. Çukurova University, Department of Physics, Adana, Turkey;4. Department of Electrical and Electronics Engineering, Middle East Technical University, Northern Cyprus Campus, (METU-NCC), Kalkanli, Guzelyurt, 99738, TRNC, Mersin 10, Turkey;5. Kalkanli Technology Valley (KALTEV), Middle East Technical University, Northern Cyprus Campus (METU-NCC), Kalkanlı, Guzelyurt, 99738, TRNC, Mersin 10, Turkey;1. Institute for Physics and CINSaT, University of Kassel, Heinrich-Plett Str. 40, 34132 Kassel, Germany;2. Centre for Molecular Materials Research, University of Oulu, PO Box 3000, 90014 Oulu, Finland;1. Advanced Optics Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK;2. Institute of Biophysics, Imaging and Optical Science (IBIOS), University of Nottingham, Nottingham, NG7 2RD, UK;3. Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China;2. School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China;1. Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, United States;2. Department of Chemistry, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran;3. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GR 30332, United States;1. College of Physics, Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China;2. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai 200083, China;3. University of Chinese Academy of Science, No.19 A Yuquan Road, Beijing 100049, China |
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| Abstract: | The excitation of plasmonic Fano resonances leads to a dual advantage in nano-photonics, in terms of local field enhancement and far-field spectral selectivity. Nevertheless, a remarkable challenge related to the hybridization between bright and dark plasmonic modes, i.e. between the two elements cooperating to the Fano resonance generation, consists in the sub-wavelength activation of dark modes via near-field channel. In this regard, strongly coupled plasmonic nano-assemblies are ideal systems providing a highly efficient way towards their excitation. Here, we analyze two trimer nano-architectures supporting respectively electric and magnetic Fano resonances. The different approaches employed for describing the two systems highlighted the role that the near-field coupling and the LSPs de-phasing separately play in the Fano hybridization phenomena. |
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| Keywords: | Localized surface plasmon Dark modes Fano resonances Near-field coupling Magnetic-like modes |
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