Femtosecond lasers are extremely versatile tools allowing a great variety of different microfabrication processes. Each process has its own requirements for laser, beam delivery or material parameters. Our Laser Nanofactory workstation allows hybrid fabrication, meaning that various processes are supported by the same equipment. The two of our most frequently used processes are multiphoton polymerization and selective glass etching, however that is far from all. By precisely tuning its parameters the same machine is capable to perform more processes including:
- Refractive index modification of transparent materials
- Surface structuring
Laser processing precision makes it possible to engrave tiny QR codes on different material surfaces as well as imprinting QR codes into transparent material volume.
Laser Surface Texturing
The femtosecond laser produces an oxidation formation on a titanium alloy surface. Varying colors can be achieved by creating oxide layers of different thicknesses.
Hydrophilic surface properties created through metal surface micro-texturing. A sponge like aluminum surface soaks up water and spreads it evenly across the surface.
A hydrophobic surface formed on a copper alloy sample using femtosecond laser texturing. The contact angle between this surface and a water drop is 150 degrees, which means that the surface has the potential for self-cleaning, anti-icing and other properties linked to hydrophobicity.
Holes in Hard Metal
Femtosecond laser micro-drilling stands out by its accuracy and minimum heat affected zone. The process is applicable to a wide variety of materials, including different metals, ceramics, polymers, and glass.
Femtosecond laser marking allows precise coloring of titanium alloy surfaces to achieve varying colors. The technique is used in cosmetic, industrial, and automotive applications such as jewelry, medical devices, and tool marking. Similar effects can be achieved on other metals, like stainless steel, copper, silver, and gold.
Femtosecond laser texturing can manipulate surface wettability to create hydrophobic or hydrophilic surfaces with applications ranging from medical tool functionalization to fluid separation and friction manipulation.
Femtosecond microfabrication in micromechanics applications uses techniques like multiphoton polymerization and selective laser etching to produce flexible and high-precision 3D structures. These structures, made of materials like polymers and ceramics, can be used in various fields like micromechanics and microrobotics and are ideal for applications that require movable assembly-free components.
A feasibility study is composed of several steps, including researching methods for fabricating micro-structures, fabricating a micro-structure prototype, measuring and aligning the prototype with technical requirements, and finally preparing a study report.