Saulius Juodkazis
Professor, Head of the Nanotechnology Research Facility
Swinburne University of Technology, Melbourne, Australia
https://www.swinburne.edu.au/research/our-research/access-our-research/find-a-researcher-or-supervisor/researcher-profile/?id=sjuodkazis
“A + R + T = 1 : control of light-matter interaction for ultra-short laser processing and perfect absorbers”
Control of light absorption with nanoscale precision is discussed for different applications: 1) 3D laser printing using ultra-short laser pulses [1-3] and 2) perfect absorbers at near-IR chemical fingerprinting spectral range [4-5]. For the direct laser writing it is shown that large area patterning [1] as well as nanoscale lithography [2] becomes possible. Fabrication of 3D micro-optical elements out of crystals [3] is another example of 3D laser micro-fabrication which will be discussed. Perfect absorbers using metal-insulator-metal (MIM) patterns were fabricated [5] and strong coupling between absorbers in the I-layer with the plasmonic modes of MIM metasurface [4] were achieved as revealed by the anti-crossing of spectral bands at the near-IR spectral range. Moore’s type of scaling of average power of ultra-short lasers (photons packed in time) with doubling rate each two years for the last 20 years [6] is an invitation for a wider use in 3D printing/modification applications with ultra-short pulsed lasers.
[1] J. Maksimovic et al., Opto-Electron Adv 5, 210086 2022
[2] Z.Z Li et al., Light: Science & Applications 9, 41 2020
[3] J-G. Hua et al., Adv. Func. Mat. 32(26), 2200255 2022
[4] Y. Nishijima et al., J. Mater. Chem. C 10, 451 2022
[5] Y. Nishijima et al., Optics Express 30(3), 4058 2022
[6] M. Han et al., Eng. Proc. 11(1), 44 2021