Subwavelength asymmetric Au–VO<sub>2</sub> nanodisk dimer for switchable directional scattering<xref rid="cpb_27_11_117301fn1" ref-type="fn">*</xref><fn id="cpb_27_11_117301fn1"><label>*</label><p>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), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2017JM6022), and the Fundamental Research Funds for the Central Universities, China (Grant No. 3102017zy017).</p></fn>

Subwavelength asymmetric Au–VO₂ nanodisk dimer for switchable directional scattering**

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), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2017JM6022), and the Fundamental Research Funds for the Central Universities, China (Grant No. 3102017zy017).

Zhang Han-Mou, Shang Wu-Yun, Lu Hua, Xiao Fa-Jun^†, Zhao Jian-Lin^‡

(color online) (a) Scattering spectra of the asymmetric Au–VO₂ nanodisk dimer at 355 K (red curve) and 300 K (blue line). The inset is a magnified spectrum for the resonant peak corresponding to metallic VO₂ nanodisk. (b) Comparison of the relative phase difference between the dipoles in the asymmetric Au–VO₂ nanodisk dimer when VO₂ nanodisk is in metallic state (red curve) and semiconductor state (blue curve).