Title :
Focus shaping of tightly focused axially symmetric polarized beams by diffractive optical elements
Abstract :
We study the focus shaping of tightly focused axially-symmetric polarized beams by diffractive optical elements, introduce the basic theory of beam shaping and derive the mathematical expressions of focusing field in a high-NA focusing system. We further design two DOEs to achieve an optical chain and an optical distribution of multiple ultrasmall focused spots with a long depth of focus respectively, which may find wide applications in optical tweezers, optical storage, microscopy and so on.
Keywords :
diffractive optical elements; laser beams; optical pulse shaping; beam shaping; diffractive optical elements; focus shaping; optical chain; optical storage; optical tweezers; tightly focused axially symmetric polarized beams; ultrasmall focused spots; Nonhomogeneous media; Optical diffraction; Optical imaging; Optical polarization; US Department of Energy; Beam shaping; DOE; axially symmetric polarized beams;
Conference_Titel :
Electronics and Optoelectronics (ICEOE), 2011 International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-61284-275-2
DOI :
10.1109/ICEOE.2011.6013329
