Title :
Tight focal spot and long depth of focus by radially polarized, narrow-width annular beams from photonic-crystal lasers
Author :
Kitamura, Kyoko ; Sakai, Kyosuke ; Kurosaka, Yoshitaka ; Miyai, Eiji ; Kunishi, Wataru ; Ohnishi, Dai ; Noda, Susumu
Author_Institution :
Dept. of Electron. Sci. & Eng., Kyoto Univ., Kyoto, Japan
Abstract :
We found that tighter focal spots with longer depths of focus are achieved by radially polarized annular beams with controlled inner and outer radii, which could lead to high-tolerance, super-resolution applications in compact optical systems.
Keywords :
laser beams; light polarisation; photonic crystals; annular beams; depth of focus; focal spot; photonic-crystal lasers; radial polarisation; Control systems; Electronic mail; Laser beams; Laser theory; Optical control; Optical polarization; Photonic crystals; Photonics Society; Research and development; Stimulated emission; (140.2020) Diode lasers; (140.7270) Vertical emitting lasers; (260.1960) Diffraction theory; (260.5430) Polarization;
Conference_Titel :
Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-55752-869-8
Electronic_ISBN :
978-1-55752-869-8
