Topology optimization of metal nanostructures for localized surface plasmon resonances
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This note presents an inverse design methodology of metal nanostructures for localized surface plasmon resonances, based on the topology optimization approach. Using the proposed method, determination of the metal distribution in nanostructures is implemented for surface enhanced Raman spectroscopy to maximize the enhancement factor. The obtained results demonstrate that the outlined approach can be used to design metal nanostructure with resonant peak and significant enhancement factor at specified incident wavelength, and to control the shift of the resonant peak by topologically optimizing the nanostructure.
KeywordsTopology optimization Metal nanostructure Localized surface plasmon resonances Enhancement factor
This work is supported by the Open Fund of SKLAO, the National Natural Science Foundation of China (No. 51405465, 51275504), Science and Technology Development Plane of JiLin Province (No. 20140519007JH) and the National High Technology Program of China (No. 2015AA042604).
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