Optical spatial shock waves in nonlocal nonlinear media

Marcucci, Giulia; Pierangeli, Davide; Gentilini, Silvia; Ghofraniha, Neda; Chen, Zhigang; Conti, Claudio

doi:10.1080/23746149.2019.1662733

Cited by 23 publications

(16 citation statements)

References 108 publications

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“…hypertonic > isotonic > hypotonic) was confirmed from direct measurements by optical tweezers experiments. Interestingly, we also found that in aged blood samples, which feature high free Hb content, the nonlinear beam dynamics is dramatically different (Figure 5(c)): at a higher concentration of Hb, a stronger self-focusing nonlinearity was observed first, and then thermal defocusing took over leading to shock-wave like patterns [22,66]. The underlying mechanism for optical nonlinearity-induced wave dynamics in such biological media certainly merits further studies.…”

Section: Nonlinear Self-guiding Of Light In Living Biological Suspensionsmentioning

confidence: 81%

Nonlinear optical response and self-trapping of light in biological suspensions

Gautam

Bezryadina

Xiang

et al. 2020

Advances in Physics: X

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In the past decade, the development of artificial materials exhibiting novel optical properties has become a major scientific endeavor. One particularly interesting system is synthetic soft matter, which plays a central role in numerous fields ranging from life sciences, chemistry to condensed matter and biophysics. In this paper, we review briefly the optical force-induced nonlinearities in colloidal suspensions, which can give rise to nonlinear self-trapping of light for enhanced propagation through otherwise highly scattering media such as dielectric and plasmonic nanosuspensions. We then focus on discussing our recent work with respect to nonlinear biological suspensions, including self-trapping of light in colloidal suspensions of marine bacteria and red blood cells, where the nonlinear response is largely attributed to the optical forces acting on the cells. Although it is commonly believed that biological media cannot exhibit high optical nonlinearity, self-focusing of light and formation of soliton-like waveguides in bio-soft matter have been observed. Furthermore, we present preliminary results on biological waveguiding and sensing, and discuss some perspectives towards biomedical applications. The concept may be developed for subsequent studies and techniques in situations when low scattering and deep penetration of light is desired.

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Section: Nonlinear Self-guiding Of Light In Living Biological Suspensionsmentioning

confidence: 81%

Nonlinear optical response and self-trapping of light in biological suspensions

Gautam

Bezryadina

Xiang

et al. 2020

Advances in Physics: X

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“…A further possibility is to consider an array of optical lenses, which, as shown in [76], may also emulate a parabolic medium. A further possible framework is given by highly nonlocal nonlinear optical systems, as thermal media, where related studies have been reported [77,78].…”

Section: Precession In Analogs and Real Experiments With Quantum Fluidsmentioning

confidence: 99%

Simulating general relativity and non-commutative geometry by non-paraxial quantum fluids

Marcucci

Conti

2019

New J. Phys.

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We show that quantum fluids enable experimental analogs of relativistic orbital precession in the presence of non-paraxial effects. The analysis is performed by the hydrodynamic limit of the Schrödinger equation. The non-commutating variables in the phase-space produce a precession and an acceleration of the orbital motion. The precession of the orbit is formally identical to the famous orbital precession of the perihelion of Mercury used by Einstein to validate the corrections of general relativity to Newton's theory. In our case, the corrections are due to the modified uncertainty principle. The results may enable novel relativistic analogs in the laboratory, also including sub-Planckian phenomenology.

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“…Simple Riemann waves (RWs) are implicit solutions of the inviscid Burgers' equation (IBE), that lies at the basis of fluid dynamics. These waves are of fundamental importance in studying shock wave phenomena occurring not only in hydrodynamics but also in numerous other physical systems [1][2][3][4][5][6][7][8][9][10][11][12]. Interest in RWs arises from the main role played by the IBE, a paradigm nonlinear partial differential equation which is used to model nonlinear and turbulent systems of various complexity, spanning dynamics encountered in e.g.…”

Section: Introductionmentioning

confidence: 99%

Third-order Riemann pulses in optical fibers

Bongiovanni¹,

Wetzel²,

Li³

et al. 2020

Opt. Express

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We introduce the concept of third-order Riemann pulses in nonlinear optical fibers. These pulses are generated when properly tailored input pulses propagate through optical fibers in the presence of higher-order dispersion and Kerr nonlinearity. The local propagation speed of these optical wave packets is governed by their local amplitude, according to a rule that remains unchanged during propagation. Analytical and numerical results exhibit a good agreement, showing controllable pulse steepening and subsequent shock wave formation. Specifically, we found that the pulse steepening dynamic is predominantly determined by the action of higher-order dispersion, while the contribution of group velocity dispersion is merely associated with a shift of the shock formation time relative to the comoving frame of the pulse evolution. Unlike standard Riemann waves, which exclusively exist within the strong self-defocusing regime of the nonlinear Schrödinger equation, such third-order Riemann pulses can be generated under both anomalous and normal dispersion conditions. In addition, we show that the third-order Riemann pulse dynamics can be judiciously controlled by a phase chirping parameter directly included in the initial chirp profile of the pulse.

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Optical spatial shock waves in nonlocal nonlinear media

Cited by 23 publications

References 108 publications

Nonlinear optical response and self-trapping of light in biological suspensions

Nonlinear optical response and self-trapping of light in biological suspensions

Simulating general relativity and non-commutative geometry by non-paraxial quantum fluids

Third-order Riemann pulses in optical fibers

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