Sub-micron patterning of solid materials with ultraviolet femtosecond pulses

Klein-Wiele, Jan-Hendrik; Bekesi, J.; Simon, Péter

doi:10.1007/s00339-004-2589-y

Cited by 35 publications

(15 citation statements)

References 8 publications

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“…Femtosecond ultraviolet laser pulses are on demand for many spectroscopic applications studying ultrafast processes in photochemistry and photobiology [1]. Many challenging applications in material processing, such as laser processing via surface ablation [2], microprinting of biomaterials [3], long-period fibre grating fabrication [4], in-depth modification of transparent solids [5], laser mirostructuring [6], to mention a few, require femtosecond laser radiation with energy of tens of microjoules. Among the variety of nonlinear optical techniques to generate ultrashort light pulses in the ultraviolet, four-photon interactions in transparent isotropic media attract a steadily growing interest.…”

Section: Introductionmentioning

confidence: 99%

Generation and amplification of ultrashort UV pulses via parametric four-wave interactions in transparent solid-state media

Dubietis¹,

Darginavičius²,

Tamošauskas³

et al. 2009

Lithuanian J. Phys.

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We report on efficient generation of the ultrashort ultraviolet light pulses by means of phase-matched four-wave optical parametric amplification and four-wave difference frequency mixing in UV-transparent solids with cubic nonlinearity. Broadband four-wave optical parametric amplification around 330 nm is investigated theoretically and demonstrated experimentally in optically isotropic materials, such as fused silica and CaF2 crystals. The results suggest that powerful broadband ultraviolet pulses as short as 7.5 fs (in the transform limit) could be amplified in the field of milijoule 1-ps visible pulses. Efficient generation of 1-ps pulses at the 3rd (351 nm), 5th (211 nm), and, in particular, 6th (176 nm) harmonics of the Nd:glass laser is experimentally demonstrated through non-collinearly phase-matched four-wave difference-frequency mixing in fused silica, CaF2 and MgF2 crystals.

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Section: Introductionmentioning

confidence: 99%

Generation and amplification of ultrashort UV pulses via parametric four-wave interactions in transparent solid-state media

Dubietis¹,

Darginavičius²,

Tamošauskas³

et al. 2009

Lithuanian J. Phys.

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“…In such cases, application of short laser pulses with picosecond pulse durations or shorter is needed [3]. Applying short-wavelength irradiation ensures a further increased spatial resolution [4].…”

mentioning

confidence: 99%

“…Focus scanning offers the capability of creating arbitrary structures with great flexibility, but with a limited processing speed. Especially for the generation of periodic structures, the application of interference-or mask projection techniques [4][5][6][7] can significantly speed up the process, creating a large number of features simultaneously, using only moderate number of pulses. However, in order to get the required energy density, which conveniently overtakes the damage threshold of the ablated material, very high pulse energies or very high overall transmittance of the optical setup is required.…”

mentioning

confidence: 99%

Fast fabrication of super-hydrophobic surfaces on polypropylene by replication of short-pulse laser structured molds

et al. 2010

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A new two-step method, facilitating the rapid generation of super-hydrophobic surface structures via parallel laser processing followed by a replica generation by injection molding is reported. A self-made fused silica-based diffractive optical element (DOE) is applied to distribute the laser energy into a 25 × 25 dot matrix. This DOE is used as a transmission mask for surface ablation of metal molds, applying short-pulse UV laser pulses. In a subsequent process step, replicas of the processed stamp are produced by variothermal injection molding, enabling the mass production of the surface pattern on plastics parts. The resulting topography facilitates a super-hydrophobic behavior of the fabricated components.

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“…This broadens the application potential of near-infrared ultrashort-pulse lasers in high-tech applications. For example, high-power picosecond laser pulses of fundamental and harmonic (up to fifth) frequencies will enable high-speed, high-precision micro-and nano-structuring of large surface areas on various materials with flat-top beams using diffraction optics and interference techniques [13]. Ultrashort laser pulses in the mid-IR spectral range can also open ways for 3D direct laser writing inside biological inside biological samples, polymer materials, and narrow-bandgap semiconductors which are opaque for visible and near-IR laser light [14].…”

Section: Introductionmentioning

confidence: 99%

Advances in High-Power, Ultrashort Pulse DPSSL Technologies at HiLASE

et al. 2017

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Abstract:The development of kW-class diode-pumped picosecond laser sources emitting at various wavelengths started at the HiLASE Center four years ago. A 500-W Perla C thin-disk laser with a diffraction limited beam and repetition rate of 50-100 kHz, a frequency conversion to mid-infrared (mid-IR), and second to fifth harmonic frequencies was demonstrated. We present an updated review on the progress in the development of compact picosecond and femtosecond high average power radiation sources covering the ultraviolet (UV) to mid-IR spectral range at the HiLASE Center. We also report on thin-disk manufacturing by atomic diffusion bonding, which is a crucial technology for future high-power laser development.

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Sub-micron patterning of solid materials with ultraviolet femtosecond pulses

Cited by 35 publications

References 8 publications

Generation and amplification of ultrashort UV pulses via parametric four-wave interactions in transparent solid-state media

Generation and amplification of ultrashort UV pulses via parametric four-wave interactions in transparent solid-state media

Fast fabrication of super-hydrophobic surfaces on polypropylene by replication of short-pulse laser structured molds

Advances in High-Power, Ultrashort Pulse DPSSL Technologies at HiLASE

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