Department of Applied Physics

Optics and Photonics

The research of the Optics and Photonics group covers a range of topics of modern optics and photonics, encompassing various aspects of light-matter interaction, optical coherence and polarization, development of methods to manipulate light with nano- and micro-structures, design and construction of novel light sources, optical metamaterials and optical imaging.

The work includes both theoretical and experimental studies and is carried out in close collaboration with local, national and international research partners. It is funded mostly by the Academy of Finland, private foundations, and direct contracts from industry. The group’s premises are in Micronova, the national micro- and nano-technology center of Finland.

Andriy Shevchenko

Group leader 2022 -

Dr. Andriy Shevchenko 

Group Leader Matti Kaivola

Group leader 1999 - 2021

Prof. Matti Kaivola 

Open Positions in Optics and Photonics

Open positions in Optics and Photonics

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Laboratory Facilities

Inverted microscope Nikon Eclipse TE2000-U

  • Brightfield, phase contrast and fluorescence capabilities
  • Piezo transducer for the stage with 1 nm step

Polarizing microscope MT9930, MEIJI TECHNO CO.

  • Rotatable stage, full polarization analysis
  • Color video camera INFINITY 2, Lumenera Co.

SpectraPro-2500i monochromator/spectrograph, Princeton Instruments/Acton

  • Operating range 185 nm – 1400 nm
  • Resolution ~0.1 nm
  • Includes PIXIS 400 camera (thermoelectric + liquid cooling), 350 nm – 1050 nm

Spectrometer Jobin Yvon (U1000) Raman, HORIBA

  • Operation range UV-NIR
  • Resolution ~0.01 nm

Ocean Optics spectrometers, fiber-coupled

  • HR4000, operation range 200 nm -1100 nm
  • USB2000+, operation range 200 nm -1100 nm
  • Fiber-coupled light source DH-2000-BAL, 200 nm -1500 nm

CW laser Millenia Xs, Spectra-Physics

  • Wavelength 532 nm
  • TEM00 transverse mode
  • Output power 10 W

CW laser Verdi, Coherent

  • Wavelength 532 nm
  • Single longitudinal mode (linewidth < 5 MHz)
  • Output power 18 W

Mode-locked Ti:sapphire laser Tsunami, Spectra-Physics

  • Wavelength 790 nm
  • Pumped with Millenia or Verdi
  • Pulse duration ~100 fs
  • Average power ~1 W
  • Peak power ~50 kW

Amplified fs-pulsed laser system

  • Coherent Astrella Ti:sapphire oscillator and regenerative amplifier
    • Central wavelength 800 nm
    • Pulse duration < 35 fs
    • Gaussian beam, M2 < 1.3
    • Pulse energy > 6 mJ at 1 kHz repetition rate
  • TOPAS-Prime Optical Parametric Amplifier, Light Conversion
    • Tunable across 290 nm – 1150 nm
    • Pulse duration < 50 fs
    • Pulse energies: ~ 100 mJ at 480 nm – 1150 nm; > 15 mJ at 290 nm – 480 nm.

CW solid-state laser, 403 nm, CrystaLaser

  • Wavelength 403 nm
  • Single longitudinal mode (~0.01 nm width, ~1 cm coherence length)
  • Output power 40 mW

CW He-Ne lasers, Melles Griot

  • Wavelength 633 nm
  • TEM00 transverse mode
  • Output power ~1 mW

Optical interferometers for characterizing surface movements and vibrations

  • Lateral resolution < 1 mm
  • Minimum detectable vibration amplitude < 1 pm
  • Frequency range from static surfaces up to 6 GHz

Latest publications

Silica-coated gold nanoshells : Surface chemistry, optical properties and stability

Marta Gordel-Wójcik, Michał Pietrzak, Radosław Kołkowski, Eugeniusz Zych 2024 Journal of Luminescence

Temporal Dynamics of Collective Resonances in Periodic Metasurfaces

Radoslaw Kolkowski, Annemarie Berkhout, Sylvianne D.C. Roscam Abbing, Debapriya Pal, Christian D. Dieleman, Jaco J. Geuchies, Arjan J. Houtepen, Bruno Ehrler, A. Femius Koenderink 2024 ACS Photonics

Semantic segmentation of raw multispectral laser scanning data from urban environments with deep neural networks

Mikael Reichler, Josef Taher, Petri Manninen, Harri Kaartinen, Juha Hyyppä, Antero Kukko 2024 ISPRS Open Journal of Photogrammetry and Remote Sensing

Hybridization of electromagnetic multipoles in a nanoscatterer in the presence of another nanoscatterer

Sagar Sehrawat, Radoslaw Kolkowski, Andriy Shevchenko 2024 New Journal of Physics

Octupole plasmon resonance improves light enhancement by a metal nanodimer

Sagar Sehrawat, Andriy Shevchenko 2024 Optics Letters

Polarization Vortex-Driven Third-Harmonic Generation in a Single Vertically-Aligned Semiconductor Nanowire

Shambhavee Annurakshita, Henrik Mäntynen, Yaraslau Tamashevich, Leevi Kallioniemi, Xiaorun Zang, Nicklas Anttu, Marco Ornigotti, Harri Lipsanen, Godofredo Bautista 2023

Extended depth of field of an imaging system with an annular aperture

Panu Hilden, Andriy Shevchenko 2023 Optics Express

Enabling infinite Q factors in absorbing optical systems

Radoslaw Kolkowski, Andriy Shevchenko 2023 Nanophotonics

Nonlinear nonlocal metasurfaces

Radoslaw Kolkowski, Tommi Hakala, Andriy Shevchenko, Mikko Huttunen 2023 Applied Physics Letters
More information on our research in the Aalto research portal.
Research portal
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