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) Four key parameters of photonic nanojet as a function of the core refractive index (n_c) for the two-layer dielectric hemisphere with R_s = 3 μm, n_s = 1.8, and R_c = 1.5 μm. (a) Focal distance f and FWHM w as a function of n_c. (b) Peak intensity I_P and effective length L as a function of n_c.