Heterogeneous double nanoparticle structures insensitive to polarization state of excitation light and their applications
A nanoparticle and polarization state technology, applied in the field of heterogeneous double nanoparticle structure, can solve the problems of troublesome, time-consuming, and rarely reported methods.
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[0017] The embodiments will be described in detail below in conjunction with the accompanying drawings and technical solutions. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0018] figure 1 It is a single core-cap nanoparticle that breaks symmetry and its extinction characteristic curve. The core-cap nanoparticle is composed of SiO with a radius of 35nm 2 The ball constitutes its core, and the gold layer covers 50% of the core surface to form a half-shell cap structure with a thickness of 8nm; as figure 1 As shown, the symmetry axis direction of the core-cap structure particles is z, the angle between the polarization direction of the excitation light and z is θ, and its components parallel to z and perpendicular to the z direction divide the LSPR absorption peaks of the core-cap structure nanoparticles into There are two, located at 620nm and 840nm respectively, where the ...
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