Results 261 to 270 of about 21,769 (310)

Radially polarized symmetric Airy beam

Optics Letters, 2020
In this Letter, we introduce a new kind of radially polarized beam called the radially polarized symmetric Airy beam (RPSAB). Compared to the linearly polarized symmetric Airy beam (SAB), the hollow focus spot of RPSAB enables it to trap a microparticle whose refractive index is lower than that of the surrounding medium, and the focus intensity of ...
Chuangjie Xu, Hongcheng Hu, Yujun Liu, Dongmei Deng   +3 more
openaire   +2 more sources

Polarization manipulation of radially polarized beams

Optical Engineering, 2012
We used patterned radial polarizers to easily generate and detect radially polarized beams. We then showed how to spatially manip- ulate the two-dimensional polarization mapping provided by a radial polar- izer using different waveplate systems to obtain new two-dimensional polarization states.
Ignacio Moreno, Jorge Albero, Jeffrey A. Davis, Don M. Cottrell, Johnathan B. Cushing   +4 more
openaire   +1 more source

Radial and azimuthal polarizers

Journal of Optics A: Pure and Applied Optics, 2006
A method for dividing an incoming beam into radially and azimuthally polarized beams is proposed and studied theoretically. A thin birefringent plate—with its optical axis perpendicular to its polished surfaces—inserted behind a focusing lens generates two foci. One can be associated with the azimuthally and other with the radially polarized components
M Erdélyi, Zs Bor
openaire   +1 more source

Polarization conversion in confocal microscopy with radially polarized illumination

Optics Letters, 2009
The effects of using radially polarized illumination in a confocal microscope are discussed, and the introduction of a polarization mode converter into the detection optics of the microscope is proposed. We find that with such a configuration, bright-field imaging can be performed without losing the resolution advantage of radially polarized ...
Tang, W.T., Yew, E.Y.S., Sheppard, C.J.R.   +2 more
openaire   +2 more sources

Annular pupils, radial polarization, and superresolution

Applied Optics, 2004
An annular pupil, which can be used to produce a Bessel beam, when combined with radially polarized illumination promises improvements in microscope resolution, increased packing density for optical storage, and finer optical lithography. When combined with a circular detection pupil in confocal microscopy a point-spread function 112 nm wide results ...
Sheppard, C.J.R., Choudhury, A.
openaire   +2 more sources

Generating radially polarized beams interferometrically

Applied Optics, 1990
Two interferometric techniques for converting a linearly polarized laser beam into a radially polarized beam with uniform azimuthal intensity are described. The techniques are based on the linear combination of orthogonally polarized beams, which have tailored intensity and phase profiles. Linearly polarized beams with intensity profiles tailored using
S C, Tidwell, D H, Ford, W D, Kimura
openaire   +2 more sources

Performance parameters for focusing of radial polarization

Optics Letters, 2008
Performance parameters are presented for high-aperture radially polarized focusing systems. These can be used for comparing the focusing performance of different optical systems, including the effect of pupil filters.
Sheppard, C.J.R., Yew, E.Y.S.
openaire   +2 more sources

Characterizing polarization properties of radially polarized beams

Optical Review, 2014
In the present work two methods of characterizing polarization properties of well-known radially polarized beams are discussed in both theoretical aspect and experimental aspect. A rotating linear polarizer used behind the beam is known to be used to qualitatively characterize the polarization properties of a radially polarized beam.
Yuzhao Ma, Renbiao Wu
openaire   +1 more source

Study of Radial Compression Elasticity of Single Xanthan Molecules by Vibrating Scanning Polarization Force Microscopy

Journal of Nanoscience and Nanotechnology, 2008
Individual xanthan molecules were prepared on highly oriented pyrolytic graphite surface with a modified spin-casting technique. Then the radial compression elasticity of single xanthan molecules was investigated by vibrating scanning polarization force ...
Huabin Wang, Xingfei Zhou, Hongjie An
exaly   +2 more sources

Sharper Focus for a Radially Polarized Light Beam

Physical Review Letters, 2003
We experimentally demonstrate for the first time that a radially polarized field can be focused to a spot size significantly smaller [0.16(1)lambda(2)] than for linear polarization (0.26lambda(2)). The effect of the vector properties of light is shown by a comparison of the focal intensity distribution for radially and azimuthally polarized input ...
Dorn, R., Quabis, S., Leuchs, G.
openaire   +3 more sources