Femtika Laser Nanofactory MPP Multiphoton Polymerization

General Introduction

The Femtika Laser Nanofactory MPP model is a micro‑ and nano‑additive manufacturing system based on femtosecond laser multiphoton polymerization. It is primarily designed for research and small‑batch production, enabling high‑precision direct writing of three‑dimensional microstructures within photosensitive polymers and related materials. The device requires no masks or support structures and can fabricate complex 3D microstructures ranging from sub‑micron to centimeter scales, making it well suited for prototyping and fundamental research in fields such as micro‑optics, microfluidics, biomedicine, micromechanics, and tissue engineering. Featuring a modular design, the system integrates a femtosecond laser source, a high‑precision positioning stage, a galvanometer scanning system, and a real‑time visual monitoring module. Its compact architecture and strong scalability allow users to swap objectives, sample stages, and auxiliary components according to experimental needs, supporting various substrate formats including glass slides, wafers, and optical fibers. While maintaining high processing accuracy, the MPP model also prioritizes ease of operation, accepting common 3D model file formats and meeting the diverse requirements of universities, research institutes, and corporate R&D departments for micro‑ and nano‑structure fabrication. With proven process stability and broad material compatibility, the MPP has found extensive applications in two‑photon polymerization, nanoscale printing, three‑dimensional photonic crystals, microneedle arrays, cell scaffolds, and more, establishing itself as a distinctive workstation in the field of femtosecond laser micro‑ and nanomanufacturing. During prolonged operation, the system maintains excellent power stability, supports continuous experimental processing, and—when combined with post‑exposure development steps—produces micro‑ and nano‑devices with intact structures, sharp edges, and superior surface quality, providing reliable hardware support for cutting‑edge research and functional device development.

Working principle

The Laser Nanofactory MPP operates on the principle of femtosecond laser‑induced multiphoton absorption and photopolymerization, making it a maskless, direct‑write additive microfabrication technique. A femtosecond laser emits ultrashort pulses that, after beam shaping, energy control, and optical path delivery, are focused into the photosensitive resin by a high‑numerical‑aperture objective lens. Within the extremely small volume at the focal point, the photon density exceeds the threshold for multiphoton absorption; material molecules simultaneously absorb multiple photons, become excited, and initiate localized photopolymerization, rapidly converting liquid monomers into solid crosslinked polymers. Because the multiphoton effect occurs only in the high‑energy‑density region near the focus, areas outside the focal spot lack sufficient energy to trigger curing, endowing the process with exceptional spatial selectivity and enabling sub‑micron‑scale precision. The system employs coordinated motion between an XYZ high‑precision translation stage and galvanometer scanners to steer the laser focus through the resin according to a pre‑defined three‑dimensional model, scanning spatial trajectories point by point, line by line, and layer by layer to build a complete 3D structure. During fabrication, a machine‑vision system continuously monitors the processing area, while an automatic focusing module ensures the focal plane remains precisely at the target depth, thereby preventing accuracy drift caused by sample tilt or surface topography. After laser writing is completed, the sample is immersed in a developer solution for rinsing; uncurried liquid resin is dissolved and removed, leaving behind the laser‑cured 3D microstructure. The entire process generates minimal thermal impact, preserving both dimensional accuracy and surface morphology, making it particularly well suited for fabricating complex geometries—such as suspended features, hollow structures, and interlocking patterns—that are difficult to achieve with conventional microfabrication techniques.

Advantages and Key Features

The MPP model offers numerous practical advantages in femtosecond laser‑based micro‑ and nano‑additive manufacturing. First, it excels in spatial resolution and fabrication accuracy, enabling the machining of sub‑micron features and meeting the stringent dimensional requirements of microoptical components and precision micromechanical devices. Second, the system supports three‑dimensional supportless fabrication, allowing direct production of complex internal cavities, overhanging structures, and movable parts without the need for auxiliary support designs, thereby significantly reducing design constraints and increasing structural freedom. In terms of material compatibility, the equipment accommodates commonly used commercial photoresists, hybrid organic–inorganic materials, elastomers, and certain biocompatible materials, enabling users to tailor rigid or flexible architectures according to application needs and expanding its utility in the biomedical field. The system employs a granite base and closed‑loop motion stages, delivering robust mechanical stability and minimal operational vibration—conditions that favor long‑term continuous processing while ensuring sample consistency. The laser source exhibits excellent long‑term power stability, minimizing issues such as uneven curing and linewidth variations caused by energy fluctuations, thus enhancing batch‑to‑batch repeatability. Integrated real‑time visual monitoring and automatic alignment capabilities enable rapid pre‑process positioning and dynamic in‑process oversight, reducing human‑induced errors and improving yield. A modular optical path and software architecture facilitate flexible upgrades and functional expansion, allowing users to add specialized objectives, environmental control modules, or multi‑material switching units as needed. The user interface is intuitively designed, supporting common 3D file formats and automatic generation of processing paths; with basic training, researchers can readily conduct experiments, lowering the barrier to entry. Overall, this model strikes an effective balance among precision, flexibility, stability, and ease of use, making it well suited to diverse research and prototyping applications.

Application Areas and Use Cases

MPP models are primarily employed in fields such as micro‑optics, microfluidics, biomedicine, microelectromechanical systems, and cutting‑edge materials science, enabling the rapid fabrication of high‑precision functional microdevices. In micro‑optics, they are commonly used to produce micro‑lens arrays, phase plates, photonic crystals, optical waveguides, and other structures, which find applications in miniature imaging systems, beam manipulation, and sensing and detection. In the realm of microfluidics, they can fabricate microvalves, microfilters, micromixers, and channel architectures, supporting lab‑on‑a‑chip platforms, cell sorting, and precise handling of minute reagent volumes. In biomedicine, the equipment can process biocompatible microscaffolds, microneedle arrays, and three‑dimensional cell‑culture substrates, serving tissue engineering, drug delivery, and in‑vitro pathological modeling. In the micro‑mechanical domain, it enables the production of precision components such as microgears, microsprings, and miniature frameworks, providing essential building blocks for micro‑robots and sensors. Typical application examples include research institutions that use MPP systems to fabricate ceramic precursor microstructures, which, after sintering, yield high‑strength ceramic metamaterials for studying mechanical properties and metamaterial characteristics; other teams have leveraged this equipment to create flexible microstructures for biomechanical monitoring and the development of implantable devices. In the development of microfluidic chips, researchers capitalize on its high precision to fabricate micron‑scale channels and filtration arrays, achieving efficient sorting of tiny particles and cells. Moreover, in the construction of teaching and research platforms, this equipment often serves as a micro‑ and nano‑fabrication experimental platform, supporting multidisciplinary, cross‑disciplinary projects, helping researchers rapidly validate novel structural designs, shortening the R&D cycle from theory to prototype, and providing an experimental foundation for high‑impact publications and patent‑worthy innovations.