Enhancement of efficiency for broadband unidirectional light scattering by core-shell nanoantennas

• Autorzy: Wang Weimin , Wang Xiaoyue , Huang Biqun , Jing Xufeng , Li Chenxia

Identyfikatory

DOI

10.37190/oa190410

• Języki publikacji: EN

Abstrakty

EN

A core-shell nanocube antenna is proposed to numerically simulate broadband unidirectional scattering. Comparing the scattering of a dielectric nanocube and core-shell nanocube, it is found that the core-shell nanocube has a higher forward/backward ratio and better unidirectional scattering efficiency. In order to further enhance forward scattering efficiency and reduce the side-lobe of scattering, the particle chain of core-shell nanocubes is proposed by arranging multiple nanoparticles. It is possible to achieve better unidirectional scattering over a wide spectral range. In addition, we also numerically studied the effect of the gap between the particles and the radius of the metal core on unidirectional scattering. It is demonstrated that the optimal gap should be selected to achieve ideal unidirectional forward scattering. The unique optical properties of core-shell nanocubes have important practical applications particularly in the fields of nanoantennas, photovoltaic devices, and nanolasers that require reflection suppression.

Słowa kluczowe

EN

nanoparticles; core-shell nanocube; particle chain; broadband unidirectional scattering

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2019
• Tom: Vol. 49, nr 4
• Strony: 655--667
• Opis fizyczny: Bibliogr. 40 poz., rys.

Twórcy

autor

Wang Weimin

• Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

autor

Wang Xiaoyue

• Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

autor

Huang Biqun

• Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

autor

Jing Xufeng

• Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

autor

Li Chenxia

• Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).