Results 241 to 250 of about 1,358,362 (273)
Some of the next articles are maybe not open access.
Dark-field imaging with cylindrical-vector beams
Applied Optics, 2006Dark-field illumination provides an imaging mode that rejects specular light, thereby highlighting edge features. We analyze dark-field imaging by using cylindrical vector beam illumination with a confocal microscope equipped with a microstructure fiber mode filter.
David P, Biss +2 more
openaire +2 more sources
Scattering of a cylindrical vector beam by a sphere
Optik, 2016Abstract The scattering of a cylindrical vector beam by a sphere is investigated within the framework of the generalized Lorenz–Mie theory (GLMT). The beam shape coefficients for cylindrical vector beams are calculated using analytical expression obtained by the integral localized approximation (ILA), and the scattering coefficients are expanded ...
Chunying Ding, Xiang’e Han, Renxian Li
openaire +1 more source
Cylindrical vector beams through amplifiers
Solid State Lasers XXVII: Technology and Devices, 2018Vector beams that carrying orbital angular momentum (OAM) have become ubiquitous and topical in a variety of research fields. The quality of such beams usually degrades while propagating in space. Here, we report a noval technique to improve the quality of vector beams by amplifying these beams through birefringent amplifier.
Andrew Forbes +4 more
openaire +1 more source
Optical trapping with cylindrical vector beams
2011 Functional Optical Imaging, 2011Recent development of cylindrical vector beams prompts its application in optical trapping, which shows more effective and improved trapping efficiency in contrast to the traditional Gaussian beam of spatially homogeneous polarization. Using the T-matrix method and vectorial diffraction theory, we calculated and compared the radiation forces exerted on
null Baoli Yao +5 more
openaire +1 more source
Optical trapping of gold nanoparticles by cylindrical vector beam
Optics Letters, 2012Optical trapping of gold nanoparticles is experimentally demonstrated using radially and azimuthally polarized beams. The transverse optical trapping stiffness of gold nanoparticles is measured. The radially polarized beam exhibits a higher trapping efficiency than the azimuthally polarized beam and the Gaussian beam.
Lu, Huang +5 more
openaire +2 more sources
Approach to multiplexing fiber communication with cylindrical vector beams
Optics Letters, 2017Cylindrical vector beams (CVBs), including radial, azimuthal, and hybrid polarization vortex states, are based on the polarization singularity and regarded as the eigenmodes of fiber. In this Letter, we propose and demonstrate CVB (de)multiplexing communication in a few-mode fiber (FMF). We simulate the eight CVB modes, including the ±1 orders and the ±
Wen, Qiao +5 more
openaire +2 more sources
Propagation properties of a cylindrically polarized vector beam
Frontiers of Optoelectronics in China, 2009A general expression for the electric field of a cylindrically polarized vector beam propagating in free space is derived on the basis of the exact fully vectorial solution of Maxwell equations in transverse Fourier space, which indicates that a cylindrical polarization can be regarded as the combination of radial and azimuthal polarizations, and the ...
Xinting Jia +4 more
openaire +1 more source
Polarization and Propagation Behavior of Cylindrical Vector Beams
Frontiers in Optics 2013, 2013Expressions for cylindrical vector beams, that also satisfy Maxwell equations are derived. Modified description of two cylindrically polarized beams Bessel-Gauss and Laguerre-Gauss are studied and their propagation and polarization properties are investigated.
William Lewis +2 more
openaire +1 more source
An all-fiber laser for cylindrical vector beam
SPIE Proceedings, 2010We proposed and demonstrated an all-fiber laser to generate cylindrical vector beams at 1030 nm. The cylindrical vector beams were obtained by exciting high order mode operating in the few-mode fiber inside the laser system, which was implemented through adjusting the angle and transversal dimension of a couple of fiber collimators.
Lixin Xu +4 more
openaire +1 more source
On-chip Tunable Cylindrical Vector Beams Emitter
Asia Communications and Photonics Conference 2016, 2016We experimentally demonstrated a silicon photonic cylindrical vector beams emitter, consisting of a micro-ring resonator with angular grating and a resistive heater. The device is capable of generating and tuning azimuthal and radial polarization beams.
Shimao Li +6 more
openaire +1 more source