Title :
Diffraction of Gaussian beams by micro-cylinders with sub-wavelength radius
Author :
Savelyev, Dmitry ; Khonina, Svetlana
Author_Institution :
Samara State Aerosp. Univ., Samara, Russia
Abstract :
We analyse diffraction of Gaussian beams by silicon micro-cylinders with sub-wavelength radius by means of the finite-difference time-domain method. It is numerically shown that a Gaussian beam can be focused near the surface of the element into a light spot with the size of 0.25λ at the full width at half maximum of intensity. If silicon micro-cylinder illuminated by a laser beam with the vortex phase singularity a light spot with the longitudinal component is generated.
Keywords :
Gaussian processes; elemental semiconductors; finite difference time-domain analysis; laser beams; light diffraction; micro-optics; silicon; Gaussian beams diffraction; Si; finite-difference time-domain; laser beam; micro-cylinders; Diffraction; Electric fields; Focusing; Laser beams; Optical diffraction; Optical polarization; Silicon; FDTD-method; diffractive optics; micro-cylinders with sub-wavelength radius; optical vortices; sharp focusing of light;
Conference_Titel :
Transparent Optical Networks (ICTON), 2015 17th International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICTON.2015.7193662
