An orbital energy flow and a spin flow at the tight focus

Компьютерная оптика

S.S. Stafeev¹ 

[1] IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS, 443001, Samara, Russia, Molodogvardeyskaya 151;

关键词: orbital energy flow;    spin flow;    tight focusing;    energy backflow;    optical vortex;   

DOI  :  10.18287/2412-6179-CO-867

来源: DOAJ

【 摘 要 】

We have shown that a reverse energy flow (negative projection of the Poynting vector onto the optical axis) at the sharp focus of an optical vortex with topological charge 2 and left-hand circular polarization arises because the axial spin flow has a negative projection onto the optical axis and is greater in magnitude than positive projection onto the optical axis of the orbital energy flow (canonical energy flow). Also, using the Richards-Wolf formulas, it is shown that when focusing a left-handed circularly polarized light, in the region of the on-axis reverse energy flow, the light is right-handed circularly polarized.

【 授权许可】

Unknown