Meyer, RemiFroehly, L.Giust, R.Del Hoyo Muñoz, JesúsFurfaro, L.Billet, C.Courvoisier, F.2025-01-222025-01-222019-05-23Meyer, R.; Froehly, L.; Giust, R.; Del Hoyo, J.; Furfaro, L.; Billet, C.; Courvoisier, F. Extremely High-Aspect-Ratio Ultrafast Bessel Beam Generation and Stealth Dicing of Multi-Millimeter Thick Glass. Applied Physics Letters 2019, 114, 201105, doi:10.1063/1.5096868.0003-695110.1063/1.50968681077-3118https://hdl.handle.net/20.500.14352/115667We report on the development of an ultrafast beam shaper capable of generating Bessel beams of high cone angle that maintain a high intensity hot spot with subwavelength diameter over a propagation distance in excess of 8 mm. This generates a high intensity focal region with extremely high aspect ratio exceeding 10 000:1. The absence of intermediate focusing in the shaper allows for shaping very high energies, up to Joule levels. We demonstrate a proof of principle application of the Bessel beam shaper for stealth dicing of thick glass, up to 1 cm. We expect that this high energy Bessel beam shaper will have applications in several areas of high intensity laser physics.engjournal articlehttps://doi.org/10.1063/1.5096868open access535FieldEnergyGlassLaser ablationNanochanelsGeometrical opticsKerr effectsBessel beamUltrafast lasersUltrafast opticsÓptica (Física)2209 Óptica