Giant tunable self-defocusing nonlinearity and dark soliton attraction observed in m-cresol/nylon thermal solutions

Abstract

Using microwave and macroscopic samples of dielectric solid to study the photonic properties of disordered photonic bandgap materials

Optical spatial shock waves in nonlocal nonlinear media

“…When it is enlightened by a CW laser beam, light absorption induces local temperature variations, which reduces the refractive index, that is, the material experiences a nonlinear thermo-optical effect. In particular, [54]'s authors measured the M-Cresol/Nylon nonlinear Kerr coefficient n 2 and found that, if for pure m-cresol it is −9 × 10 −8 cm 2 /W, for a nylon mass concentration of 3.5% it is −1.6 × 10 −5 cm 2 /W, an order of magnitude higher than most of the other thermal nonlinear materials reported in literature. Authors generated the DSWs in Fig.…”

“…Kerr effect can be generalized to the nonlocal case when the nonlinear response in a specific point depends on entire beam transverse profile. This occurs, e.g., in thermal media [4,27,32,[43][44][45][46][47][48][49][50][51][52][53][54][55]. In these materials, light propagation is affected by a highly nonlocal Kerr nonlinearity, ruled by nonlocal NLSE.…”

Ring Dirac solitons in nonlinear topological systems

“…Chalcogenide waveguides with high nonlinear refractive index n 2 ∼ 4 × 10 −14 cm 2 /W [53] have enabled demonstration of self-focusing for cm-long samples at the 1.5 µm wavelength [54]. The main difficulty would be to balance the focusing nonlinearity of the fiber material with slow but strong thermal defocusing nonlinearity of the liquids, where values up to n 2 = −1.6 × 10 −5 cm 2 /W were reported [55]. In the pulsed regime this could be done by controlling the repetition rate.…”

Resonant Optical Nonlinearity and Fluorescence Enhancement in Electrically Tuned Plasmonic Nanosuspensions

“…[6][7][8][9][10][11][12] Recently, plasmonic nanosuspensions are found to have superior performance, as compared with their dielectric counterparts, in demonstrating tunable optical nonlinearities that support guiding and self-trapping of light beams. [13][14][15][16][17][18][19][20][21] Robust soliton-like propagation of light over a long distance of several centimeters has been observed due to an effective cubic-quintic-like plasmonic resonant nonlinearity, which would otherwise be impossible in such highly scattering media.…”