Abstract
Light wave is described as a transversal wave by Maxwell equations, i.e., its polarization is always perpendicular to its propagation direction. However, tightly focused radial polarized light has strong longitudinal components, which take about 45% of the total energy in the central lobe when the numerical aperture of the lens is 0.95 [1], and this ratio can increase to 81% after applying a binary optical element shown in Fig.1a, where the energy density of radial component is only about 8% of the longitudinal component, i.e., this beam is substantially a longitudinally polarized beam, as is shown in Fig.1b. This longitudinally polarized laser beam propagates about 4 wavelengths without divergence, with a beam size of about 0.43λ, as is shown in Fig. 1c.
© 2011 Optical Society of America
PDF ArticleMore Like This
Yuichi Kozawa and Shunichi Sato
ATuB3 Advanced Solid-State Photonics (ASSL) 2011
Yuichi Kozawa and Shunichi Sato
STh3K.2 CLEO: Science and Innovations (CLEO:S&I) 2015
S. Quabis, G. Kihara Rurimo, M. Schardt, S. Malzer, G.H. Dohler, and G. Leuchs
WC3 International Symposium on Optical Memory and Optical Data Storage (ODS) 2005