A combined approach of laser-induced forward transfer (LIFT) and chemical etching pure metal films is studied to fabricate complex, free-standing, 3-dimensional gold structures on the few micron scale. picosecond pulsed laser source with 515 nm central wavelength used deposit droplets copper in a sequential fashion. After transfer, ferric chloride completely removes mechanical Cu support leaving final free-standing structure. Unprecedented feature sizes smaller than 10 μm are achieved...

We demonstrate the use of laser-induced forward transfer (LIFT) in combination with a novel donor replenishment scheme to print continuous copper wires.Wires mm length, few microns wide and submicron height have been printed using 800 nm, 1 kHz repetition rate, 150 fs pulsed laser.A 120 nm thick was used along laser pulse energy densities 0.16-0.21J cm -2 overlapping few-micron sized pads form millimeter long wires.The wires measured resistivity 17 ± 4 times that bulk copper.

We present laser-induced forward transfer of solid-phase polymer films, shaped using a Digital Micromirror Device (DMD) as variable illumination mask.Femtosecond laser pulses with fluence 200-380 mJ/cm 2 at wavelength 800 nm from Ti:sapphire amplifier were used to reproducibly thin films poly(methyl methacrylate) small ~30 µm by thickness ~1.3 µm.This first demonstration DMD-based LIFT shows minimum feature sizes ~10µm.

We present a rapid technique for the patterning of complex structures with ~2µm resolution via multiphoton polymerization, through use single ultrashort pulse in combination spatial intensity modulation possible from digital multimirror device. Sub-micron features have been achieved ten consecutive pulses.

Abstract Laser transmission welding is a technique for joining transparent polymer to an opaque polymer. This paper presents the results of nanosecond pulsed laser (1064 nm) cyclic olefin copolymer (COC). COC has wide range applications in biological, biomedical, membrane, and semiconductor fields. advantages over conventional adhesive thermal-based methods bonding. These include precision sealing minimised heat affected zone, which makes this process favourable bio-applications. The effect...

Commercial digital multimirror devices offer a cheap and effective alternative to more expensive spatial light modulators for ablation via beam shaping.Here we present femtosecond laser using the device from an Acer C20 Pico Digital Light Projector show of complex features with feature sizes ranging sub-wavelength (400 nm) up ∼30 μm.Simulations are presented that have been used optimize understand experimentally observed resolution.

Femtosecond laser-induced backward transfer of transparent photopolymers is demonstrated in the solid state, assisted by a digital micromirror spatial light modulator for producing shaped deposits. Through use an absorbing silicon carrier substrate, we have been able to successfully solid-phase material, with lateral dimensions as small ~6 µm. In addition, incorporating photonic waveguide relief structure enables imprinted deposits that accomplished surface features exactly complementing...

We have demonstrated the fabrication of a thermoelectric energy harvesting device via laser-induced forward transfer intact solid thin films. Thermoelectric chalcogenide materials, namely bismuth telluride (Bi2Te3), selenide (Bi2Se3) and antimony (Bi0.5Sb1.5Te3), were sequentially printed using nanosecond excimer laser onto an elastomeric polydimethylsiloxane-coated glass substrate to form thermocouples connected in series creating generator. The resulting generator Seebeck coefficient...

A digital micromirror device is used as an intensity spatial light modulator, in conjunction with a femtosecond laser, for programmable image-projection-based laser ablation of polycrystalline diamond. Results show the machining complex structures on diamond surface, where individual have submicron features, covering total area 10 × μm and fabricated using ten pulses. This dynamic image-based technique may offer speed advantages over serial-writing procedures, whilst still producing...

We present the use of digital micromirror devices as variable illumination masks for pitch-splitting multiple exposures to laser machine surfaces materials. Ultrafast pulses length 150 fs and 800 nm central wavelength were used sequential machining contiguous patterns on surface samples in order build up complex structures with sub-diffraction limit features. Machined tens hundreds micrometers lateral dimensions feature separations low 270 produced electroless nickel an optical setup...

A digital micromirror device has been used to project variable-period grating patterns at high values of demagnification for direct laser ablation on planar surfaces. Femtosecond pulses ∼1 mJ pulse energy 800 nm wavelength from a Ti:sapphire were machine complex with areas up cm2 thin films bismuth telluride by dynamically modifying the period as sample was translated beneath imaged pulses. Individual ∼30 30 μm gratings stitched together form contiguous structures, which had diffractive...

Titanium (Ti)-in-diffused lithium niobate waveguide mode filters fabricated using laser-induced forward transfer followed by thermal diffusion are presented.The control was achieved adjusting the separation between adjacent Ti segments thus varying average value of refractive index along length in-diffused channel waveguides.The fabrication details, loss measurements and near-field optical characterization presented.Modeling results regarding device performance also discussed.©2010 Optical...

We present femtosecond laser-induced forward transfer of focussed ion beam pre-machined discs crystalline magneto-optic yttrium iron garnet (YIG) films.Debris-free circular micro-discs with smooth edges and surface uniformity have been successfully printed.The nature the printed has not altered by LIFT printing process, as was confirmed via micro-Raman measurements.

Abstract In this paper a processing technique for sapphire is presented which combines laser-induced amorphization and subsequent selective wet etching of amorphized as well anisotropic single-crystalline ( α -Al 2 O 3 ). Using technique, microstructures can be realized on the surface in bulk substrates. By focusing ultra-short laser pulses inside sapphire, its structure transformed from crystalline into amorphous. The modified material selectively removed using etchants, such hydrofluoric...

Understanding the physics behind ejection dynamics in laser-induced forward transfer (LIFT) is of key importance order to develop new printing techniques and overcome their limitations. In this work, a jet-on-jet phenomenon presented its physical origin discussed. Time-resolved shadowgraphy imaging was employed capture complemented with photodiode intensity measurements light emitted by plasma. A focus scan conducted, which confirmed that secondary jet ejected due plasma generated at center...

Titanium in-diffused lithium niobate index-tapered waveguides have been fabricated using laser-induced forward transfer technique for mode-filtering applications. Details of their fabrication, losses and transmission characterization are presented.

Films of thermoelectric bismuth selenide and telluride have been transferred by laser-induced forward transfer onto glass polymer substrates. Influence on properties morphology the material was compared.