Results 21 to 30 of about 749,179 (255)

A minimal subwavelength focal spot for the energy flux

Компьютерная оптика, 2021
It is shown theoretically and numerically that circularly and linearly polarized incident beams produce at the tight focus identical circularly symmetric distributions of an on-axis energy flux.
S.S. Stafeev, V.D. Zaicev
doaj   +1 more source

Polarization-selective gratingmirrors used in the generation of radial polarization [PDF]

, 2005
International audienceTwo novel methods to control the polarization of laser radiation are presented. The discrimination between different polarization distributions isperformed with a corrugation grating in the top high-index layer of a multilayer ...
Pigeon, Florent, Glur, Hansjürg, Parriaux, O., Glur, H., Romano, V., Ahmed, M., Moser, Tobias, Pigeon, F., Parriaux, Olivier, Romano, Valerio, Ahmed, M. A., Graf, T.   +11 more
core   +2 more sources

Polarization of Femtosecond Laser for Titanium Alloy Nanopatterning Influences Osteoblastic Differentiation

Nanomaterials, 2022
Ultrashort pulse lasers have significant advantages over conventional continuous wave and long pulse lasers for the texturing of metallic surfaces, especially for nanoscale surface structure patterning.
Mathieu Maalouf, Alain Abou Khalil, Yoan Di Maio, Steve Papa, Xxx Sedao, Elisa Dalix, Sylvie Peyroche, Alain Guignandon, Virginie Dumas   +8 more
doaj   +1 more source

Properties of Magnetic Field Fluctuations in Long-Lasting Radial IMF Events from Wind Observation

Atmosphere, 2022
Long-lasting radial interplanetary magnetic field (IMF) intervals in which IMF points along the solar wind velocity for several hours have many interesting properties.
Gilbert Pi, Alexander Pitňa, Guo-Qing Zhao, Zdeněk Němeček, Jana Šafránková, Tsung-Che Tsai   +5 more
doaj   +1 more source

The investigation of the features of focusing vortex super-Gaussian beams with a variable-height diffractive axicon

Компьютерная оптика, 2021
Spatial intensity distributions of the Laguerre-superGauss modes (1,0) as well as a super-Gaussian beam with radial and circular polarization were investigated versus changes in the height of a diffractive axicon.
D.A. Savelyev
doaj   +1 more source

Quantitative Assessment of Birefringent Skin Structures in Scattered Light Confocal Imaging Using Radially Polarized Light

Sensors, 2013
The polarization characteristics of birefringent tissues could be only partially obtained using linearly polarized light in polarization sensitive optical imaging.
Natallia Eduarda Uzunbajakava, Jasmin Alexandra Holz, Siqi Ding, Qiangqiang Tai, Altaf Hussain, Clemence Boudot, Rieko Verhagen, Babu Varghese   +7 more
doaj   +1 more source

Ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting laser devices [PDF]

, 2010
Spin-polarized lasers offer new encouraging possibilities for future devices. We investigate the polarization dynamics of electrically pumped vertical-cavity surface-emitting lasers after additional spin injection at room temperature.
Hofmann, M. R., Soldat, H., Jaehme, H., Ackemann, T., Gerhardt, N. C., Li, M.   +5 more
core   +4 more sources

Features of focusing of optical vortices using subwavelength elements with varying height of odd and even relief zones

Компьютерная оптика
In this work, the propagation of optical vortices with circular, radial, and azimuthal polarization through subwavelength ring gratings with standard and GRIN substrates using a finite difference time domain method is numerically simulated.
D.A. Savelyev
doaj   +1 more source

Polarization conversion when focusing cylindrically polarized vortex beams

Scientific Reports, 2016
Currently, cylindrical beams with radial or azimuthal polarization are being used successfully for the optical manipulation of micro- and nano-particles as well as in microscopy, lithography, nonlinear optics, materials processing, and telecommunication ...
Alexey P. Porfirev, Andrey V. Ustinov, Svetlana N. Khonina   +2 more
doaj   +1 more source

Radially Polarized Orbital Angular Momentum Beam Emitter Based on Shallow-Ridge Silicon Microring Cavity

IEEE Photonics Journal, 2014
Radially polarized orbital angular momentum (OAM) beams could be applied in optical manipulation and optical microscopy. An integrated OAM beam emitter with radially polarized radiation is proposed on shallow-ridge silicon microring with azimuthally ...
Rui Li, Xue Feng, Dengke Zhang, Kaiyu Cui, Fang Liu, Yidong Huang   +5 more
doaj   +1 more source