Managing focal fields of vector beams with multiple polarization singularities

Han, Lei; Liu, Sheng; Zhang, Yi; Cheng, Hao; Gan, Xuetao

doi:10.1364/ao.55.009049

Cited by 9 publications

(9 citation statements)

References 26 publications

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“…The total intensity distributions for different symmetries are shown in the left column, and the middle and right columns show the intensity distributions after a vertical and horizontal polarizer, respectively. The insets are corresponding numerical simulation results according to the vector diffraction integral theory 36 , 37 . In experiment, in order to directly present the focal field, we employ a Lens of f = 10 cm to focus the vector field.…”

Section: Resultsmentioning

confidence: 99%

“…In order to elaborately generate multiple focal spots which has independent controllability in the focal plane, it is necessary to appropriately partition the incident beam and then apply different phase modulations. Here, we utilize the vector diffraction integral theory, of which the general focus formula can be expressed as 36 , 37 where, A = − kf /(2 π ), A 1 ( θ , ϕ ) is the amplitude of the incident beam, A 2 ( θ , ϕ ) is a 3 × 3 matrix related to the structure of objective, Δ α ( θ , ϕ ) is the phase distribution of the incident beam, p x , p y and p z is a matrix unit vector about the polarization of incidence light, θ is the converge angle given by sin θ = rNA /( Rn t ), NA is the numerical aperture of the objective, n t is the refractive index of the immersion medium, k is the wave number, ( r , ϕ ) and are the cylindrical coordinates in the pupil and focal planes, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Creation of independently controllable multiple focal spots from segmented Pancharatnam-Berry phases

Guo

Shu

et al. 2018

Sci Rep

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Recently, based on space-variant Pancharatnam-Berry (PB) phases, various flat devices allowing abrupt changes of beam parameters have been predicted and demonstrated to implement intriguing manipulation on spin states in three dimensions, including the efficient generation of vector beams, spin Hall effect of light and light-guiding confinement, and so on. Here, we report on the construction of independently controllable multiple focal spots with different inhomogeneous polarization states by utilizing segmented PB phases. Combining the phase shift approach with PB phases, we engineer fan-shaped segmented PB phases and encode them onto two spin components that compose a hybrid polarized vector beam in a modified common-path interferometer system. Experimental results demonstrate that the fan-shaped segmented PB phase enables the flexible manipulation of focal number, array structure and polarization state of each focal spot. Furthermore, we demonstrate that this fan-shaped approach enables to flexibly tailor the polarization state and the spin angular momentum distribution of a tightly focused field, which have potential applications in optical manipulation, tailored optical response and imaging etc.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Creation of independently controllable multiple focal spots from segmented Pancharatnam-Berry phases

Guo

Shu

et al. 2018

Sci Rep

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“…We can generate a presupposed vector beam with an arbitrary polarization distribution just by loading a calculated phase map on the SLM. For example, the vector beams with multiple polarization singularities can be created by setting [50]…”

Section: Generating Arbitrary Vector Beamsmentioning

confidence: 99%

Highly efficient generation of arbitrary vector beams with tunable polarization, phase, and amplitude

Liu¹,

Shu²,

Zhang³

et al. 2018

Photon. Res.

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134

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We propose an efficient and robust method to generate tunable vector beams by employing a single phasetype spatial light modulator (SLM). With this method, a linearly polarized Gaussian beam can be converted into a vector beam with arbitrarily controllable polarization state, phase, and amplitude. The energy loss during the conversion is greatly reduced and depends mainly on the reflectivity of the SLM. We experimentally demonstrate that conversion efficiency of about 47% is achieved by using an SLM with reflectivity of 62%. Several typical vector beams, including cylindrical vector beams, vector beams on higher order Poincaré spheres, and arbitrary vector beams attached with phases and with tunable amplitude, are generated and verified experimentally. This method is also expected to create high-power vector beams and play important roles in optical fabrication and light trapping.

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“…For splitting single CVBs into multiple identical beams, one-dimensional diffraction gratings are well proven [14]. It should be noted that the appropriate arrangement of multiple polarization singularities inherent to CVBs allows one to control the polarization distributions of the focal fields while the intensity maintains unchanged [15].…”

Section: Introductionmentioning

confidence: 99%

Generation of Multiple Vector Optical Bottle Beams

et al. 2021

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We propose binary diffractive optical elements, combining several axicons of different types (axis-symmetrical and spiral), for the generation of a 3D intensity distribution in the form of multiple vector optical ‘bottle’ beams, which can be tailored by a change in the polarization state of the illumination radiation. The spatial dynamics of the obtained intensity distribution with different polarization states (circular and cylindrical of various orders) were investigated in paraxial mode numerically and experimentally. The designed binary axicons were manufactured using the e-beam lithography technique. The proposed combinations of optical elements can be used for the generation of vector optical traps in the field of laser trapping and manipulation, as well as for performing the spatial transformation of the polarization state of laser radiation, which is crucial in the field of laser-matter interaction for the generation of special morphologies of laser-induced periodic surface structures.

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Managing focal fields of vector beams with multiple polarization singularities

Cited by 9 publications

References 26 publications

Creation of independently controllable multiple focal spots from segmented Pancharatnam-Berry phases

Creation of independently controllable multiple focal spots from segmented Pancharatnam-Berry phases

Highly efficient generation of arbitrary vector beams with tunable polarization, phase, and amplitude

Generation of Multiple Vector Optical Bottle Beams

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