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Beam Shaping & Spatial Effects
Non-diffractive & accelerating beams
We study singular beams, from their fundamental properties to their experimental generation and optimization, including for practical applications:
Generation and energy optimization of 2D nondiffractive (Bessel) and accelerating (e.g. Airy) beams
Applications to ultrafast laser material processing (e.g. graphene micro/nano-structuring with vortex beams)
Extension to 3+1D systems with spatio-temporal optical bullets
Optimized 3D Airy optical bullet (reduced spatio-temporal footprint obtained via spectral shaping)
Riemann beam steepening, observed experimentally within a nonlinear solution of m-cresol and nylon.
Nonlinear spatial effects
We work on the impact of spatial nonlinear effects on advanced beam propagation dynamics, and their temporal NLSE (pulses) counterparts:
Nonlinear stability of nondiffractive/accelerating beams
Study of time-space duality in the nonlinear Schrödinger equation (NLSE)
Hydrodynamics analogies: Burgers' equations, shallow water wave approximation, etc.
Nonlocal & spatial nonlinear effects (in e.g. thermal & photorefractive media)
Spatio-temporal effects in multimode fibers (MMF)
Applications in biological systems
Theoretical advances and insight in nonlinear spatial dynamics form the basis of widespread applications in biological systems:
Nonlinear & nonlocal dynamics induced by optical forces in suspensions & biological media
Beam self-guiding in biological systems: Deep-penetration with reduced scattering effects and qualitative impact of the biological content on beam propagation
Applications to optimized bioimaging systems and architectures, etc.
Red blood cells optical trapping & beam self-guiding (left). Beam output profiles (right) in a linear (top) and nonlinear (bottom) regime.
Selected publications:
M. Fabert, M. Săpânțan, K. Krupa, A. Tonello, Y. Levantoux, S. Février, T. Mansuryan, A. Niang, B. Wetzel, G. Millot, S. Wabnitz, V. Couderc, Coherent combining of self-cleaned multimode beams, Scientific Reports, Vol. 10, pp. 20481 (2020)
D. Bongiovanni, B. Wetzel, P. Yang, Y. Hu, Y. Qiu, J. Xu, S. Wabnitz, Z. Chen, R. Morandotti, Optical generation and control of spatial Riemann waves, Optics Letters, Vol. 44, Issue 14, pp. 3542-3545 (2019) - Editor’s Pick
R. Gautam, Y. Xiang, J. Lamstein, Y. Liang, A. Bezryadina, G. Liang, T. Hansson, B. Wetzel, D. Preece, A. White, M. Silverman, S. Kazarian, J. Xu, R. Morandotti, Z. Chen, Optical force-induced nonlinearity and self-guiding of light in human red blood cell suspensions, Light: Science & Applications, Vol. 8, Issue 1, pp. 31 (2019)
A. Bezryadina, T. Hansson, R. Gautam, B. Wetzel, G. Siggins, A. Kalmbach, J. Lamstein, D. Gallardo, E.J. Carpenter, A. Ichimura, R. Morandotti, Z. Chen, Nonlinear self-action of light through biological suspensions, Physical Review Letters, Vol. 119, pp. 058101 (2017) - Editor’s suggestion & Featured in Physics 10, 90 (2017)
D. Bongiovanni, B. Wetzel, Y. Hu, Z. Chen, R. Morandotti, Optimal compression and energy confinement of optical Airy bullets, Optics Express, Vol. 24, Issue 23, pp. 26454 (2016)
D. Bongiovanni, Y. Hu, B. Wetzel, R. A. Robles, G. Mendoza González, E. A. Marti-Panameño, Z. Chen, R. Morandotti, Efficient optical energy harvesting in self-accelerating beams, Scientific Reports, Vol. 5, pp. 13197 (2015)
B. Wetzel, C. Xie, R. Giust, P.A. Lacourt, F. Courvoisier, J.M. Dudley, Femtosecond laser fabrication of micro and nano-disks in single layer graphene using vortex Bessel beams, Applied Physics Letters, Vol. 103, Issue 24, pp. 241111 (2013)
Selected highlights & monographs:
R. Gautam, Y. Xiang, J. Lamstein, Y. Liang, A. Bezryadina, G. Liang, T. Hansson, B. Wetzel, D. Preece, A. White, M. Silverman, S. Kazarian, J. Xu, R. Morandotti, Z. Chen, Light-guiding in red blood cell suspensions, Optics & Photonics News Special Issue: Optics in 2019, Vol. 30, Issue 12, pp. 37 (2019)
A. Bezryadina, T. Hansson, R. Gautam, B. Wetzel, G. Siggins, A. Kalmbach, J. Lamstein, D. Gallardo, E.J. Carpenter, A. Ichimura, R. Morandotti, Z. Chen, Bacterial waveguides of light, Optics & Photonics News Special Issue: Optics in 2017, Vol. 28, Issue 12, pp. 41 (2017)
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