中国物理B ›› 2021, Vol. 30 ›› Issue (11): 114207-114207.doi: 10.1088/1674-1056/ac0785
Ye-Wan Ma(马业万)†, Zhao-Wang Wu(吴兆旺), Yan-Yan Jiang(江燕燕), Juan Li(李娟), Xun-Chang Yin(尹训昌), Li-Hua Zhang(章礼华), and Ming-Fang Yi(易明芳)
Ye-Wan Ma(马业万)†, Zhao-Wang Wu(吴兆旺), Yan-Yan Jiang(江燕燕), Juan Li(李娟), Xun-Chang Yin(尹训昌), Li-Hua Zhang(章礼华), and Ming-Fang Yi(易明芳)
摘要: The effects of inner nanowire radius, shell thickness, the dielectric functions of middle layer and surrounding medium on localized surface plasmon resonance (LSPR) of gold-dielectric-silver nanotube are studied based on the quasi-static approximation. Theoretical calculation results show that LSPR of gold-dielectric-silver nanotube and LSPR numbers can be well optimized by adjusting its geometrical parameters. The longer wavelength of $\left|\omega_{-}^{-}\right\rangle$ mode takes place a distinct red-shift with increasing the inner nanowire radius and the thickness of middle dielectric layer, while a blue-shift with increasing outer nanotube thickness. The physical mechanisms are explained based on the plasmon hybridization theory, induced charges and phase retardation. In addition, the effects of middle dielectric function and surrounding medium on LSPR, and the local electric field factor are also reported. Our study provides the potential applications of gold-dielectric-silver nanotube in biological tissues, sensor and related regions.
中图分类号: (Wave optics)