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) Dependence of directivity on dimer separation at ambient temperature of 355 K. (b)–(d) The normalized far-field scattering patterns (|E|²) of the asymmetric Au–VO₂ nanodisk dimer (the upper panel) and corresponding phase differences |φ_Au –φ_VO₂| between the two nanodisks (the lower panel) in xy planes with the dimer separations of l = 170 nm, l = 290 nm, and l = 410 nm, repsectively.