Fringe pattern of the field diffracted by axicons

Martirosyan, A. E.; Altucci, C.; Lisio, C. de; Porzio, Alberto; Solimeno, S.; Toşa, V.

doi:10.1364/josaa.21.000770

Cited by 17 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fortunately this effect can be neglected if the waist of the Gaussian beam illuminating the axicon is less than half of the axicon radius [21,22]. However the influence of imperfect tip of the axicon and its impact upon the generated QBB is rarely addressed in the literature [23][24][25] even though it also causes undesired axial modulation of the QBB. Numerous practical applications of the QBB are based on smooth lateral profile of optical intensity along the beam propagation, for example simultaneous micromanipulation or guiding of microparticles or atoms [16,[26][27][28][29][30][31][32][33], second harmonic generation [34,35], optical coherence tomography over a large depth range [23], generation of waveguides [36,37], and optoporation [38].…”

Section: Introductionmentioning

confidence: 99%

High quality quasi-Bessel beam generated by round-tip axicon

2008

View full text Add to dashboard Cite

We study theoretically and experimentally the spatial intensity distribution of the zero-order Bessel beam formed by the axicon which possess a rounded tip. Such a tip generates a refracted beam that interferes with the quasi-Bessel beam created behind the axicon. In turn an undesired intensity modulation occurs that significantly disturbs the unique properties of the quasi-Bessel beam--namely the constant shape of the lateral intensity distribution and the slow variation of the on-axis beam intensity along the beam propagation. We show how the spatial filtration of the beam in the Fourier plane improves this spatial beam distribution and removes the undesired modulation. We use an efficient numerical method based on Hankel transformations to simulate the propagation of the beam behind the axicon and filter. We experimentally measure the intensity distribution of the beam in many lateral planes and subsequently reconstruct the spatial intensity distribution of the beam. Computed and measured beam distributions are compared and the obtained agreement is very good.

show abstract

Section: Introductionmentioning

confidence: 99%

High quality quasi-Bessel beam generated by round-tip axicon

2008

View full text Add to dashboard Cite

show abstract

“…An axicon is a specialized type of lens, which has a conical surface. An axicon transforms a laser beam into a ring-shaped distribution in the far field [41]. In our case, we used wavelength-scaled structure that cannot be described by ray-optics [22,23].…”

Section: Simulations and Resultsmentioning

confidence: 99%

Photonic Hook with Modulated Bending Angle Formed by Using Triangular Mesoscale Janus Prisms

et al. 2022

View full text Add to dashboard Cite

In this study, we propose a novel design of triangular mesoscale Janus prisms for the generation of the long photonic hook. Numerical simulations based on the finite-difference time-domain method are used to examine the formation mechanism of the photonic hook. The electric intensity distributions near the micro-prisms are calculated for operation at different refractive indices and spaces of the two triangular micro-prisms. The asymmetric vortices of intensity distributions result in a long photonic hook with a large bending angle. The length and the bending angle of the photonic hook are efficiently modulated by changing the space between the two triangular micro-prisms. Moreover, the narrow width of the photonic hook is achieved beyond the diffraction limit. The triangular Janus micro-prisms have high potential for practical applications in optical tweezers, nanoparticle sorting and manipulation and photonic circuits.

show abstract

“…Arbitrary BB generation can be clearly visualized with a ray diagram as illustrated in figure 16. The Gaussian beam-pumped axicon can generate 0th order BB [97,98]. Furthermore, with the addition of another diffractive optical element, which can produce a Gaussian vortex with arbitrary order, to the axicon we can produce higher order BBs.…”

Section: Axiconmentioning

confidence: 99%

A conceptual review on Bessel beams

Rao

2024

Phys. Scr.

View full text Add to dashboard Cite

Over the past 36 years much research has been carried out on Bessel beams (BBs) owing to their peculiar properties, viz non-diffraction behavior, self-healing nature, possession of well-defined orbital angular momentum with helical wave-front, and realization of smallest central lobe. Here, we provide a detailed review on BBs from their inception to recent developments. We outline the fundamental concepts involved in the origin of the BB. The theoretical foundation of these beams was described and then their experimental realization through different techniques was explored. We provide an elaborate discussion on the different kinds of structured modes produced by the BB. The advantages and challenges that come with the generation and applications of the BB are discussed with examples. This review provides reference material for readers who wish to work with non-diffracting modes and promotes the application of such modes in interdisciplinary research areas.

show abstract

Fringe pattern of the field diffracted by axicons

Cited by 17 publications

References 19 publications

High quality quasi-Bessel beam generated by round-tip axicon

High quality quasi-Bessel beam generated by round-tip axicon

Photonic Hook with Modulated Bending Angle Formed by Using Triangular Mesoscale Janus Prisms

A conceptual review on Bessel beams

Contact Info

Product

Resources

About