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) Normalized intensity distributions of photonic nanojets generated from (a) a homogeneous dielectric microsphere with R = 3 μm, n = 2.0 and (b) a two-layer dielectric hemisphere with R_s = 3 μm, n_s = 2.8 and R_c = 1.5 μm, n_c = 2.0.