Fractional two-parameter parabolic diffraction-free beams
Sign Up to like & getrecommendations! Published in 2019 at "Optics Communications"
DOI: 10.1016/j.optcom.2019.05.071
Abstract: Abstract We consider two-parameter real-valued parabolic diffraction-free beams. An analytical expression for the complex amplitude of the beam is obtained using the superposition of the Bessel functions. Symmetry properties of beams are analyzed and numerically… read more here.
Keywords: diffraction free; parameter; two parameter; parabolic diffraction ... See more keywords
Diffraction-free light droplets for axially-resolved volume imaging
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-00042-w
Abstract: An ideal direct imaging system entails a method to illuminate on command a single diffraction-limited region in a generally thick and turbid volume. The best approximation to this is the use of large-aperture lenses that… read more here.
Keywords: free light; diffraction free; diffraction limited; volume ... See more keywords
Synthesis of near-diffraction-free orbital-angular-momentum space-time wave packets having a controllable group velocity using a frequency comb.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.456781
Abstract: Novel forms of light beams carrying orbital angular momentum (OAM) have recently gained interest, especially due to some of their intriguing propagation features. Here, we experimentally demonstrate the generation of near-diffraction-free two-dimensional (2D) space-time (ST)… read more here.
Keywords: space; wave packets; group; near diffraction ... See more keywords
Single optical element to generate a meter-scale THz diffraction-free beam.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.471070
Abstract: Diffraction-free electromagnetic beam propagates in free space without change in its two-dimensional transverse profile. Elongating diffraction-free length can benefit the practical application of this beam. Here, we demonstrate that a THz diffraction-free beam with meter-scale… read more here.
Keywords: beam; free beam; diffraction free; optical element ... See more keywords
Spatiotemporal diffraction-free pulsed beams in free-space of the Airy and Bessel type.
Sign Up to like & getrecommendations! Published in 2017 at "Optics letters"
DOI: 10.1364/ol.42.005038
Abstract: We investigate the dynamics of spatiotemporal optical waves with one transverse dimension obtained as the intersections of the dispersion cone with a plane. We show that, by appropriate spectral excitations, the three different types of… read more here.
Keywords: beams free; diffraction free; pulsed beams; bessel ... See more keywords
Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives
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DOI: 10.3390/mi14050989
Abstract: To form a diffraction-free beam with a complex structure, we propose to use a set of primitives calculated iteratively for the ring spatial spectrum. We also optimized the complex transmission function of the diffractive optical… read more here.
Keywords: beam formation; free beam; composite diffraction; diffraction free ... See more keywords