Characteristics of photonic nanojets from two-layer dielectric hemisphere

Liu Yunyue¹, Liu Xianchao^{1, 2}, Li Ling¹, Chen Weidong¹, Chen Yan¹, Huang Yuerong¹, Xie Zhengwei^{1, †}

(color online) (a)–(d) Normalized intensity distributions of photonic nanojets at different incident wavelengths through a two-layer dielectric hemisphere with R_s = 3 μm, n_s = 1.8, and R_c = 1.5 μm, n_c = 1.5. (e) The intensity profiles along the z direction of photonic nanojets at different incident wavelengths, and the transverse profiles at the focal point are also shown in the inset.