Limits...
Unveiling the propagation dynamics of self-accelerating vector beams

View Article: PubMed Central - PubMed

ABSTRACT

We study theoretically and experimentally the varying polarization states and intensity patterns of self-accelerating vector beams. It is shown that as these beams propagate, the main intensity lobe and the polarization singularity gradually drift apart. Furthermore, the propagation dynamics can be manipulated by controlling the beams’ acceleration coefficients. We also demonstrate the self-healing dynamics of these accelerating vector beams for which sections of the vector beam are being blocked by an opaque or polarizing obstacle. Our results indicate that the self-healing process is almost insensitive for the obstacles’ polarization direction. Moreover, the spatial polarization structure also shows self- healing properties, and it is reconstructed as the beam propagates further beyond the perturbation plane. These results open various possibilities for generating, shaping and manipulating the intensity patterns and space variant polarization states of accelerating vector beams.

No MeSH data available.


Related in: MedlinePlus

Generating radially polarized self-accelerating vector beams.(a) A radially polarized He-Ne laser beam is diffracted from a binary modulated cubic phase mask. Then, it is optically Fourier transformed and recorded at the focal plane and beyond. As illustrated, the radial polarization singularity (white line) and the highest intensity lobe (red line) propagate along different trajectories. (b,c) Comparison between the numerically calculated diffraction patterns of the known scalar Airy beam and the radially polarized Airy beam at the focal plane. As can be seen, the main intensity lobe is imprinted with radial polarization singularity. (d–h) Experimental and numerical results of radially polarized Airy vector beams after applying a polarizer. Polarization direction is denoted by the white arrow (un-polarized, 45° polarized, x polarized, y polarized, respectively).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5037461&req=5

f1: Generating radially polarized self-accelerating vector beams.(a) A radially polarized He-Ne laser beam is diffracted from a binary modulated cubic phase mask. Then, it is optically Fourier transformed and recorded at the focal plane and beyond. As illustrated, the radial polarization singularity (white line) and the highest intensity lobe (red line) propagate along different trajectories. (b,c) Comparison between the numerically calculated diffraction patterns of the known scalar Airy beam and the radially polarized Airy beam at the focal plane. As can be seen, the main intensity lobe is imprinted with radial polarization singularity. (d–h) Experimental and numerical results of radially polarized Airy vector beams after applying a polarizer. Polarization direction is denoted by the white arrow (un-polarized, 45° polarized, x polarized, y polarized, respectively).

Mentions: The combination of Airy patterns and vector beams (shown in Fig. 1), which can be defined as Airy vector beams, has been somewhat overlooked by researchers, with very little reports so far731. In such beams, the interplay between the Airy pattern and polarization states, symmetry differences and different propagation dynamics, rises many interesting outcomes.


Unveiling the propagation dynamics of self-accelerating vector beams
Generating radially polarized self-accelerating vector beams.(a) A radially polarized He-Ne laser beam is diffracted from a binary modulated cubic phase mask. Then, it is optically Fourier transformed and recorded at the focal plane and beyond. As illustrated, the radial polarization singularity (white line) and the highest intensity lobe (red line) propagate along different trajectories. (b,c) Comparison between the numerically calculated diffraction patterns of the known scalar Airy beam and the radially polarized Airy beam at the focal plane. As can be seen, the main intensity lobe is imprinted with radial polarization singularity. (d–h) Experimental and numerical results of radially polarized Airy vector beams after applying a polarizer. Polarization direction is denoted by the white arrow (un-polarized, 45° polarized, x polarized, y polarized, respectively).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037461&req=5

f1: Generating radially polarized self-accelerating vector beams.(a) A radially polarized He-Ne laser beam is diffracted from a binary modulated cubic phase mask. Then, it is optically Fourier transformed and recorded at the focal plane and beyond. As illustrated, the radial polarization singularity (white line) and the highest intensity lobe (red line) propagate along different trajectories. (b,c) Comparison between the numerically calculated diffraction patterns of the known scalar Airy beam and the radially polarized Airy beam at the focal plane. As can be seen, the main intensity lobe is imprinted with radial polarization singularity. (d–h) Experimental and numerical results of radially polarized Airy vector beams after applying a polarizer. Polarization direction is denoted by the white arrow (un-polarized, 45° polarized, x polarized, y polarized, respectively).
Mentions: The combination of Airy patterns and vector beams (shown in Fig. 1), which can be defined as Airy vector beams, has been somewhat overlooked by researchers, with very little reports so far731. In such beams, the interplay between the Airy pattern and polarization states, symmetry differences and different propagation dynamics, rises many interesting outcomes.

View Article: PubMed Central - PubMed

ABSTRACT

We study theoretically and experimentally the varying polarization states and intensity patterns of self-accelerating vector beams. It is shown that as these beams propagate, the main intensity lobe and the polarization singularity gradually drift apart. Furthermore, the propagation dynamics can be manipulated by controlling the beams’ acceleration coefficients. We also demonstrate the self-healing dynamics of these accelerating vector beams for which sections of the vector beam are being blocked by an opaque or polarizing obstacle. Our results indicate that the self-healing process is almost insensitive for the obstacles’ polarization direction. Moreover, the spatial polarization structure also shows self- healing properties, and it is reconstructed as the beam propagates further beyond the perturbation plane. These results open various possibilities for generating, shaping and manipulating the intensity patterns and space variant polarization states of accelerating vector beams.

No MeSH data available.


Related in: MedlinePlus