The Stratakis Lab

The Stratakis Lab

Ultrafast Laser Micro and Nano Processing Laboratory



The Ultrafast laser micro- and nano- processing laboratory disposes state-of-the-art equipment in combination with highly specialized human expertise, capable of supporting cutting edge research projects of European researchers active in interdisciplinary scientific fields. In particular the lab infrastructure comprise various short (nanosecond, picosecond) and ultrashort (femtosecond) UV, VIS and NIR laser sources combined with a series laser processing and nanomaterials synthesis and deposition workstations with in-line optical diagnostics. The lab also hosts various laser spectroscopy workstations including capabilities of Reflectivity (250-2500 nm/4K-380K), Photoluminescence spectroscopy (250-2500 nm/4K-380K), Valley Polarization (4K-380K) and Time Resolved Absorption (250-2500 nm) spectroscopy. Additive manufacturing facilities that combine 3D printing with laser subtractive manufacturing and sintering of inks, are additionally provided. Finally a fully customized multimodal non Linear Microscopy, Imaging and spectroscopy workstation is developed for materials diagnostics and in-situ monitoring of biological processes.

Pharos-SP laser source

  • 1.5mJ pulse energy
  • 1026nm, tunable repetition rate from 1kHz to 200kHz & tunable pulse duration from 175fs to 10ps
  • 513nm, tunable repetition rate from 60kHz to 200kHz & tunable pulse duration from 175fs to 10ps
  • 1026nm, 76MHz, 70fs, oscillator laser

iHR-320 Horiba Spectrometer (300g/mm & 1200g/mm gratings)

  • μPL spectroscopy (543nm, 594nm excitation wavelengths)
  • Differential reflectivity (supercontinuum 350nm-1000nm)
  • μRaman spectroscopy (473nm excitation wavelength)
  • Valley polarization (594nm excitation wavelength)
  • 78K to 340K temperature window (Janis ST-500 cryostat)
  • Spectroscopy in controlled atmosphere (10-5mbar vacuum, He, N2, O2)

Zeiss Axio Observer Z1

  • Nonlinear Microscopy (Ultrafast 76Mhz, 1026nm excitation wavelength)
  • Polarized Second Harmonic Generation (PSHG) in transmission and reflection mode
  • 2 objective lenses (40x, 1.3NA & 20x 0.8NA)
  • Fully motorized stage (including incubator for biological samples)
  • Hamamatsu  PMTs
  • Galvanometric mirrors (Cambridge technology)

Newport Transient Absorption Spectrometer (TAS)

  • Femtosecond pump probe spectroscopy (1026nm & 513nm excitation wavelength)
  • Effective spectral range: 450nm-1050nm
  • Spectral resolution: 2nm
  • Time window: 8000ps
  • Minimum step size: 0.13fs
  • Temporal resolution: 1.4*FWHM (245fs at 175fs)
  • 150 g/mm & 121g/mm available gratings
  • Automated beam steering (ABS) for optimum laser alignment
  • Solid & liquid samples in transmission & reflection mode

Surface processing work stations

1)     Aerotech high precision work station

  • 1nm, XYZ precision
  • 513nm, 175fs to 10ps, 60 to 200kHz laser irradiation

2) Newport XYZ high precision electronic stage

  • 2nm, XYZ precision
  • 1026nm & 513nm, 175fs to 10ps, 1kHz to 200kHz laser irradiation
  • Linear, elliptical, circular, radial and azimuthal polarization of both 1026 and 513nm laser beams

3)     Vacuum chamber on XY electronic stage

  • 1026nm, 175fs to 10ps, 1kHz to 200kHz laser irradiation
  • Controlled atmosphere (10-2mbar vacuum, SF6, Cl2, NH3, N2)

4)     Vacuum chamber on mechanical stage

  • 248nm, 20ns, 10Hz laser irradiation
  • Controlled atmosphere (10-2 mbar vacuum, Cl2, NH3)
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Euronews FUTURIS Documentary on our work in biomimetic laser processed tribological surfaces

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Participation ‘Genius of Nature’, production of Terra Mater Factual Studios with BBC

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Special issue “Novel Biomaterials for Tissue Engineering 2018

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