We propose an asymmetric Au–VOnanodisk dimer for realizing a switchable directional scattering. Specifically, the directional scattering can be triggered on/off through controlling the phase transition of the VOnanod...We propose an asymmetric Au–VOnanodisk dimer for realizing a switchable directional scattering. Specifically, the directional scattering can be triggered on/off through controlling the phase transition of the VOnanodisk from metallic to semiconductor state. More strikingly, an obvious directional scattering with the directivity of ～40 dB is achieved under the metallic state of VOnanodisk. This tunable directional scattering is further explained with an interference model where the Au and VOnanodisks are treated as two weakly interacting electric dipoles. The phase transition controlled scattering patterns of asymmetric Au–VOnanodisk dimer are then well interpreted from the phase difference between these two dipoles.展开更多
基金Project supported by the National Key R&D Program of China(Grant No.2017YFA0303800)the National Natural Science Foundation of China(Grant Nos.11634010,61675170,and 11874050)+1 种基金the Natural Science Basic Research Plan in Shaanxi Province,China(Grant No.2017JM6022)the Fundamental Research Funds for the Central Universities,China(Grant No.3102017zy017)
文摘We propose an asymmetric Au–VOnanodisk dimer for realizing a switchable directional scattering. Specifically, the directional scattering can be triggered on/off through controlling the phase transition of the VOnanodisk from metallic to semiconductor state. More strikingly, an obvious directional scattering with the directivity of ～40 dB is achieved under the metallic state of VOnanodisk. This tunable directional scattering is further explained with an interference model where the Au and VOnanodisks are treated as two weakly interacting electric dipoles. The phase transition controlled scattering patterns of asymmetric Au–VOnanodisk dimer are then well interpreted from the phase difference between these two dipoles.
