Sharper Focal Spot for a Radially Polarized Beam Using Ring Aperture with Phase Jump
نویسندگان
چکیده
منابع مشابه
Far-field radially polarized focal spot from plasmonic spiral structure combined with central aperture antenna
Manipulation of a vector micro-beam with an optical antenna has significant potentials for nano-optical technology applications including bio-optics, optical fabrication, and quantum information processing. We have designed and demonstrated a central aperture antenna within an Archimedean spiral that extracts the bonding plasmonic field from a surface to produce a new vector focal spot in far-f...
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The generation of a sub-diffraction longitudinally polarized spot is of great interest in various applications, such as optical tweezers, super-resolution microscopy, high-resolution Raman spectroscopy, and high-density optical data storage. Many theoretical investigations have been conducted into the tight focusing of a longitudinally polarized spot with high-numerical-aperture aplanatic lense...
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Conversion of a linearly polarized CO(2) laser beam into a radially polarized beam is demonstrated with a novel double-interferometer system. The first Mach-Zehnder interferometer converts the linearly polarized input beam into two beams with sin(2) θ and cos(2) θ intensity profiles, where θ is the azimuthal angle. This is accomplished by using two spiral-phase-delay plates with opposite handed...
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ژورنال
عنوان ژورنال: Journal of Engineering
سال: 2013
ISSN: 2314-4904,2314-4912
DOI: 10.1155/2013/512971