Bessel beams: Diffraction in a new light

McGloin, David; Dholakia, Kishan

doi:10.1080/0010751042000275259

Cited by 1,179 publications

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“…The initial radius of the Gaussian profile is w 0 and the Rayleigh range is z R ¼ pw 2 0 /l, where l is the wavelength of the BG mode. A BG beam has a finite propagation distance, z max , over which it is said to be nominally non-diffracting 27 , shown as the shaded diamond-like region in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…Bessel beams represent a class of nominally propagation-invariant solutions to the Helmholtz equation 26 and have been extensively investigated to date 27 . A laboratory approximation to these fields, BG beams, has similar properties over finite distances 28 , including their ability to reconstruct both in amplitude and phase after encountering an obstruction 24,25 .…”

Section: Resultsmentioning

confidence: 99%

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Self-healing of quantum entanglement after an obstruction

et al. 2014

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Quantum entanglement between photon pairs is fragile and can easily be masked by losses in transmission path and noise in the detection system. When observing the quantum entanglement between the spatial states of photon pairs produced by parametric downconversion, the presence of an obstruction introduces losses that can mask the correlations associated with the entanglement. Here we show that we can overcome these losses by measuring in the Bessel basis, thus once again revealing the entanglement after propagation beyond the obstruction. We confirm that, for the entanglement of orbital angular momentum, measurement in the Bessel basis is more robust to these losses than measuring in the usually employed Laguerre-Gaussian basis. Our results show that appropriate choice of measurement basis can overcome some limitations of the transmission path, perhaps offering advantages in free-space quantum communication or quantum processing systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Self-healing of quantum entanglement after an obstruction

et al. 2014

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“…This example is particularly interesting because Bessel beams confine their energy to a narrow beamwidth, which has applications in fields such as near field probing, medical imaging, and radiometry [29,30]. For simplicity, we assume the fields are invariant alongẑ, and the electric field iŝ z-polarized.…”

Section: -2mentioning

confidence: 99%

Wave-Shaping Surfaces

Alù¹

2013

Physics

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Huygens' principle is a well-known concept in electromagnetics that dates back to 1690. Here, it is applied to develop designer surfaces that provide extreme control of electromagnetic wave fronts across electrically thin layers. These reflectionless surfaces, referred to as metamaterial Huygens' surfaces, provide new beam shaping, steering, and focusing capabilities. The metamaterial Huygens' surfaces are realized with two-dimensional arrays of polarizable particles that provide both electric and magnetic polarization currents to generate prescribed wave fronts. A straightforward design methodology is demonstrated and applied to develop a beam-refracting surface and a Gaussian-to-Bessel beam transformer. Metamaterial Huygens' surfaces could find a wide range of applications over the entire electromagnetic spectrum including single-surface lenses, polarization controlling devices, stealth technologies, and perfect absorbers.

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“…Almost all finite width beams except Airy [1,2], Bessel [3,4], Mathieu [5,6], and parabolic beams [7] are subjected to diffraction while they propagate through free space or media. The diffraction induced distortion causes loss of information carried by the beam.…”

Section: Introductionmentioning

confidence: 99%

Kerr-field-induced tunable optical atomic waveguide

Sharma

Dey

2017

Phys. Rev. A

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We propose an efficient scheme for the generation of tunable optical waveguide based on atomic vapor in N -type configuration. We exploit both control field induced transparency and Kerr field induced absorption to produce a flexible probe transparency window otherwise not feasible. We employ a suitable spatial profile of control and Kerr beams to create a high contrast refractive index modulation that holds the key to guiding a weak narrow probe beam. Further we numerically demonstrate that high contrast tunable waveguide permits the propagation of different modes of probe beam to several Rayleigh lengths without diffraction. This efficient guiding of narrow optical beam may have important applications in large density image processing, and high resolution imaging.

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Bessel beams: Diffraction in a new light

Cited by 1,179 publications

References 0 publications

Self-healing of quantum entanglement after an obstruction

Self-healing of quantum entanglement after an obstruction

Wave-Shaping Surfaces

Kerr-field-induced tunable optical atomic waveguide

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