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absorption circular dichroism induced by contorted electrical oscillations in rectangular nanoholes
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نویسنده
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li ying ,bai yu ,jing zhimin ,abudukelimu abuduwaili ,zhang zhongyue
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 4 - صفحه:1159 -1164
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چکیده
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The chiroptical response of plasmonic chiral nanostructures can be tuned by combining different structures. in this paper, an l-shaped metal strip is introduced into a rectangular metal nanohole to generate absorption circular dichroism (acd). the results of a finite-element method calculation show that acd effects result from contorted electrical oscillations in the l-shaped strip. additional calculations show that the acd effects of the proposed metasurface depend strongly on the structure parameters. these findings provide not only a mechanism for enhancing chiroptical responses in planar structures but also a general strategy for the chiral manipulation of light and creation of chiroptical devices.
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کلیدواژه
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plasmonics ,circular dichroism ,metasurface ,resonance
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آدرس
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shaanxi normal university, school of physics and information technology, china, shaanxi normal university, school of physics and information technology, china, shaanxi normal university, school of physics and information technology, china, shaanxi normal university, school of physics and information technology, china, shaanxi normal university, school of physics and information technology, china
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Authors
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