Materials Science Research Lecture
***Refreshments at 3:45pm in Noyes lobby
Abstract:
A multi-photon 3D micro-/nano-lithography technique will be introduced by explaining its principles, techniques, applications as a tool for rapid prototyping and technology for advanced additive manufacturing.
A possibility to use any color of spectrum from 500-nm-to-1200-nm with controlled pulse widths of 100-fs will be demonstrated revealing a delicate interplay of photo-physical mechanisms more than just two-photon absorption inducing localized photo-polymerization. An evolution of the polymerised volume during direct laser writing (DLW) via different energy delivery mechanisms will be discussed: one-/two-/three-photon absorption, avalanche ionization, and thermal diffusion leading to controlled photo-polymerization are revealed. The results can be used to tailor polymerized volume for increasing the 3D nano-printing performance. A non-trivial energy deposition by X-photon absorption with an onset of a strong lateral size increase at the higher pulse energy at longer wavelengths and can be understood as due to reaching epsilon-near-zero conditions. Such recent findings are valuable for further developing of two-photon polymerization / multi-photon lithography (2PP/MPL) technology to reduce the footprint size and increase its efficiency. Understanding mechanisms and appearance of λ-tunable commercial lasers are benefiting broad applications in advanced optical additive manufacturing areas of micro-optics, nano-photonic devices, meta-materials, and integrated-chips, and tissue engineering.
Finally controlled refractive index, high transparency and resilient as well as active micro-optical components will be showcased as their production route is enabled X-photon lithography in combination with calcination and atomic layer deposition. The achievements have immediate applications in sensing under harsh conditions, open space, and unmanned aerial vehicles (UAV).
- Edvinas Skliutas et al., X-photon laser direct write 3D nanolithography, Virt. Phys. Prototyp. 18(1), e2228324 (2023); 10.1080/17452759.2023.2228324
- D. Gonzalez-Hernandez et al., Single-step 3D printing of micro-optics with adjustable refractive index by ultrafast laser nanolithography, Adv. Opt. Mater. 11(14) (2023); https://doi.org/10.1002/adom.202300258
- G. Balčas et al., Fabrication of Glass-Ceramic 3D Micro-Optics by Combining Laser Lithography and Calcination. Adv. Funct. Mater. 2215230 (2023); https://doi.org/10.1002/adfm.202215230
More about the Speaker:
Mangirdas Malinauskas defended Ph.D. in 2010 at Vilnius University, Laser Research Center - "Laser Fabrication of Functional 3D Polymeric Micro/Nanostructures", supervisor Prof. R. Gadonas. During career he has done traineeships at LZH (Prof. B.N. Chichkov) and IESL-FORTH (Dr. M. Farsari). In 2019-2022 a specially appointed Professor at Tokyo Institute of Technology (Japan), group of Prof. J. Morikawa. Currently he investigates fundamentals of laser 3D micro-/nano-structuring of cross-linkable materials for applications in micro-optics, nano-optics (photonics), and biomedicine at VU LRC. Laboratory funding is acquired via National, European, and worldwide (NATO, US Army) schemes. Optica Fellow in 2022.