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plasmonic fano resonance in homotactic aluminum nanorod trimer: the key role of coupling gap
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نویسنده
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zhu xupeng ,zhang shi ,shi huimin ,zheng mengjie ,wang yasi ,wu renglai ,quan jun ,zhang jun ,duan huigao
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 5 - صفحه:1281 -1287
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چکیده
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Recently, the fano effect of aluminum nanostructures has attracted a lot of attentions in several detector and sensor applications, but the role of coupling gap in it remains unintuitive. in this paper, a homotactic aluminum rod trimer (hart) is designed to form the plasmonic fano resonances and visualize the important role of coupling gap size. the plasmon hybridization model and far field images were used to qualitatively describe the formation mechanism of fano resonance. the simulation results intuitively show that the fano dip of hart with a smaller coupling gap size has a higher red-shift speed when increasing the refractive index of surrounding environment or the length of hart with a fixed axial ratio (ls/ll = 0.6). our study provides the insights to the key role of coupling gap in the performance of fano structures.
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کلیدواژه
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plasmon ,fano resonance ,aluminum nanorods ,far field ,coupling gap
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آدرس
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lingnan normal university, school of physics science and technology, china, hunan university, college of mechanical and vehicle engineering, state key laboratory of advanced design and manufacturing for vehicle body, china, guangzhou university, center for research on leading technology of special equipment, school of mechanical and electric engineering, china, hunan university, college of mechanical and vehicle engineering, state key laboratory of advanced design and manufacturing for vehicle body, china, hunan university, college of mechanical and vehicle engineering, state key laboratory of advanced design and manufacturing for vehicle body, china, lingnan normal university, school of physics science and technology, china, lingnan normal university, school of physics science and technology, china, lingnan normal university, school of physics science and technology, china, hunan university, college of mechanical and vehicle engineering, state key laboratory of advanced design and manufacturing for vehicle body, china
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Authors
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