Tight focusing cylindrical vector beams with fractional order

2021 ◽  
Vol 38 (4) ◽  
pp. 1090
Author(s):  
S. S. Stafeev ◽  
A. G. Nalimov ◽  
V. D. Zaitsev ◽  
V. V. Kotlyar
Keyword(s):  
Fractional Order ◽  
Tight Focusing ◽  
Vector Beams

scholarly journals Focusing fractional-order cylindrical vector beams

2021 ◽  
Vol 45 (2) ◽  
pp. 172-178
Author(s):  
S.S. Stafeev ◽  
V.D. Zaitsev
Keyword(s):  
Fractional Order ◽  
Energy Flux ◽  
Energy Flow ◽  
Focal Spot ◽  
Numerical Aperture ◽  
Vortex Beam ◽  
Incident Wavelength ◽  
Spot Center ◽  
Vector Beams ◽  
Linearly Polarized

By numerically simulating the sharp focusing of fractional-order vector beams (0≤m≤1, with azimuthal polarization at m=1 and linear polarization at m=0), it is shown that the shape of the intensity distribution in the focal spot changes from elliptical (m=0) to round (m=0.5) and ends up being annular (m=1). Meanwhile, the distribution pattern of the longitudinal component of the Poynting vector (energy flux) in the focal spot changes in a different way: from circular (m=0) to elliptical (m=0.5) and ends up being annular (m=1). The size of the focal spot at full width at half maximum of intensity for a first-order azimuthally polarized optical vortex (m=1) and numerical aperture NA=0.95 is found to be 0.46 of the incident wavelength, whereas the diameter of the on-axis energy flux for linearly polarized light (m=0) is 0.45 of the wavelength. Therefore, the answers to the questions: when the focal spot is round and when elliptical, or when the focal spot is minimal -- when focusing an azimuthally polarized vortex beam or a linearly polarized non-vortex beam, depend on whether we are considering the intensity at the focus or the energy flow. In another run of numerical simulation, we investigate the effect of the deviation of the beam order from m=2 (when an energy backflow is observed at the focal spot center). The reverse energy flow is shown to occur at the focal spot center until the beam order gets equal to m=1.55.

Tight focusing properties of spatial-variant linearly-polarized vector beams

2013 ◽  
Vol 43 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Bing Gu ◽  
Yang Pan ◽  
Jia-Lu Wu ◽  
Yiping Cui
Keyword(s):  
Tight Focusing ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Focusing Properties

Tight focusing properties of hybridly polarized vector beams

2012 ◽  
Vol 29 (6) ◽  
pp. 1099 ◽  
Author(s):  
Kelei Hu ◽  
Ziyang Chen ◽  
Jixiong Pu
Keyword(s):  
Tight Focusing ◽  
Vector Beams ◽  
Focusing Properties

Vector beams excited nonlinear optical effects

2018 ◽  
Vol 27 (04) ◽  
pp. 1850045 ◽  
Author(s):  
Bing Gu ◽  
Xi Cao ◽  
Guanghao Rui ◽  
Yiping Cui
Keyword(s):  
Nonlinear Optical ◽  
Polarization Distribution ◽  
Polarized Beams ◽  
Optical Media ◽  
Optical Effects ◽  
Tight Focusing ◽  
Nonlinear Optical Effects ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Light Beams

Vector beams with the desired polarization structure interacting with matter result in many novel nonlinear optical effects. Herein, we review the tight focusing and weak focusing properties of three types of light beams, namely, linearly polarized beams, cylindrical vector beams, and hybridly polarized beams. In particular, we revisit the second- and third-order nonlinear optical effects in nonlinear optical media under the excitation of several types of vector beams with the desired polarization distribution. The prospects of their applications in nonlinear optical microscopy and materials characterization are also briefly discussed.

scholarly journals Tight focusing properties and focal field tailoring of cylindrical vector beams generated from a linearly polarized coherent beam array

2021 ◽  
Vol 29 (4) ◽  
pp. 5259
Author(s):  
Yuqiu Zhang ◽  
Tianyue Hou ◽  
Hongxiang Chang ◽  
Tao Yu ◽  
Qi Chang ◽  
...  
Keyword(s):  
Coherent Beam ◽  
Beam Array ◽  
Tight Focusing ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Focusing Properties

scholarly journals Tailored intensity landscapes by tight focusing of singular vector beams

2017 ◽  
Vol 25 (17) ◽  
pp. 20194 ◽  
Author(s):  
Eileen Otte ◽  
Kemal Tekce ◽  
Cornelia Denz
Keyword(s):  
Singular Vector ◽  
Tight Focusing ◽  
Vector Beams

scholarly journals Generation and tight focusing of hybridly polarized vector beams

2010 ◽  
Vol 18 (26) ◽  
pp. 27650 ◽  
Author(s):  
Gilad M. Lerman ◽  
Liron Stern ◽  
Uriel Levy
Keyword(s):  
Tight Focusing ◽  
Vector Beams
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