Directional Enhancement Analysis of All-Dielectric Optical Nanoantennas Based on SIE Formulation

作者：Qi, Xin^*; Nie, Zaiping; Chen, Yongpin; Que, Xiaofeng; Hu, Jun; Wang, Yue

来源：IEEE Photonics Technology Letters, 2018, 30(1): 123-126.

DOI：10.1109/LPT.2017.2778292

• Optical antenna
• all-dielectric antenna
• high permittivity
• surface integral equations
• quasi-Helmholtz decomposition (loop-star decomposition)

Recent advances in optical nanoantennas made of high-permittivity low-loss dielectric particles have demanded efficient numerical modeling techniques for electromagnetic radiation and scattering simulations. Here, the facing requirements of fast convergence of iteration methods and good accuracy of results, a modified surface integral equation for high-permittivity objects has been presented. Moreover, based on the proposed surface integral equation, a full study of the dependence of the radiation pattern on the relative permittivity and wavelength has been performed for a single-dielectric nanoparticle with the excitation of an electric dipole source. Then, the directional enhancement of radiation is explored from Yagi-Uda geometry systems made of nanoparticles with optimal permittivities for reflector and directors.

• 出版日期2018-1-1
• 单位电子科技大学