Nonstandard Light for Ultrafast Laser Microstructuring and Nanostructuring

Courvoisier, François

doi:10.1007/978-3-031-14752-4_16

Cited by 4 publications

(2 citation statements)

References 173 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[25] This regime allows for energy deposition of a single ultrashort pulse along a high-aspect ratio nano-plasma, which evolves within tens of microseconds, [26] into a high-aspect ratio nano-void inside glasses or sapphire, with important applications for high-speed cutting (≈ 1 m s −1 ) or for the nano-fabrication of sensors. [27][28][29][30][31][32][33] Importantly, higher-order Bessel beams, which carry a vortex charge, possess a focal region in the shape of a high-aspect-ratio hollow cylinder. Their stability in the nonlinear, ultrashort pulse regime has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…[ 25 ] This regime allows for energy deposition of a single ultrashort pulse along a high‐aspect ratio nano‐plasma, which evolves within tens of microseconds, [ 26 ] into a high‐aspect ratio nano‐void inside glasses or sapphire, with important applications for high‐speed cutting (

\approx 1

\rm{s}^{-1}

) or for the nano‐fabrication of sensors. [ 27–33 ]…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single Shot Generation of High‐Aspect‐Ratio Nano‐Rods from Sapphire by Ultrafast First Order Bessel Beam

Belloni,

Hassan,

Furfaro

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

Engineering the polarization and spatial phase of ultrafast laser pulses represents a compelling strategy for enhancing control over laser–matter interaction and enabling rapid and innovative nano‐fabrication processes. Here, the single‐shot, ultrafast laser fabrication of high‐aspect‐ratio, vertically standing nano‐pillars with a diameter of ≈800 nm and height up to 15 µm on the surface of sapphire, is reported. To achieve this, the distinctive properties of diffraction‐free, first‐order Bessel beams endowed with either radial or azimuthal polarization distributions, are harnessed under tight focusing conditions. The highly intense laser–matter interaction in this configuration generates a tubular‐shaped, high‐pressure field beneath the material surface, leading to the rapid expulsion of material across the surface. Three distinct regimes for the pillar generation are identified in addition to a mechanism based on the Rayleigh‐Plateau theory that explains the distinct morphological regimes observed. The findings not only shed light on the underlying physical mechanisms of intense excitation of transparent dielectrics but also offer exciting prospects for the rapid fabrication of positive nano‐structures and material compression across various fields of application.

show abstract