Formation of photonic in jet step-index medium with mesoscale glass microcylinder


  Tal Elbaz  ,  Alina Karabchevsky  
Alina Karabchevsky

Formation of photonic in jet step-index medium with mesoscale glass microcylinder

Tal Elbaz and Alina Karabchevsky

School of Electrical and Computer Engineering, Ben-Gurion University of the Negev

 

A “photonic jet” (PJ) is an intense optical jet-like beam highly concentrated in the near field. It has low divergence and a full width at half-maximum (FWHM) that is smaller as compared to the incidence wavelength illuminating an auxiliary structure. By breaking the symmetry, one can deform the wave front and create the photonic hook by partially blocking the incident beam. Recent publication [1] reported on fabrication and experimental observation of photonic nano-jet (PNJ), generated by single mesoscale microcylinder as an elegant way for optomechanical applications.

 

Utilizing the finite element method (FEM) algorithm of COMSOL Multiphysics we demonstrate a highly localized photonic nano-jet generated by an incident plane-wave step-index media. Mesoscale micro-cylinder was illuminated in air while half of the cylinder surrounded by different media, in which photonic jet and photonic hook are created. The outcomes of this research are important to super-resolution in aqua environments and for opto-mechanical manipulation of bio-entities in vitro and in vivo.

 

References:

[1] Simulation and experimental observation of tunable photonic nanojet and photonic hook upon asymmetric illumination of a mesoscale cylinder with mask. Opt Lett 45(17) 4899-4902 (2020).