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.
Group leader 2022 -
Dr. Andriy Shevchenko
Group leader 1999 - 2021
Prof. Matti Kaivola
Research
Highlights of recent research
Extended-depth-of-field microscopy
Octupole resonance for local field enhancement
Infinite Q-factors for plasmonic systemsField enhancement by waveguide-plasmon polaritonsNew electromagnetic anapolesCrosstalk reduction between nanowaveguidesMode interference in photonic crystalsEnhancement of fluorescenceNear-field spatial coherenceAberration-insensitive microscopyControl of group velocity of light in free spaceCancellation of optical diffractionPolarization time of unpolarized lightSpatial dispersion and fluorescence in metamaterials
Quadrupole optical metasurface
Suppression of optical diffraction
Open Positions in Optics and Photonics
Open positions in Optics and Photonics
Laboratory Facilities
Inverted microscope Nikon Eclipse TE2000-U
- Brightfield, phase contrast and fluorescence capabilities
- HAMAMATSU ORCA-ER CCD camera
- 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
Spontaneous symmetry breaking in plasmon lattice lasers
Nelson de Gaay Fortman, Radoslaw Kolkowski, Debapriya Pal, Said R.K. Rodriguez, Peter Schall, A. Femius Koenderink
2024
Science Advances
Silica-coated gold nanoshells : Surface chemistry, optical properties and stability
Marta Gordel-Wójcik, Michał Pietrzak, Radosław Kołkowski, Eugeniusz Zych
2024
Journal of Luminescence
Matrix analysis of high-density arrayed waveguides : Crosstalk suppression by bending
Panu Hildén, Andriy Shevchenko
2024
Physical Review Applied
Probing nonradiating states of light in photonic nanostructures using nonlinear optical processes
Radoslaw Kolkowski, Huayu Bai, Matti Kaivola, Andriy Shevchenko
2024
Proceedings - 2024 24th International Conference on Transparent Optical Networks, ICTON 2024
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
Roadmap on photonic metasurfaces
Sebastian A. Schulz, Rupert F. Oulton, Mitchell Kenney, Andrea Alù, Isabelle Staude, Ayesheh Bashiri, Zlata Fedorova, Radoslaw Kolkowski, A. Femius Koenderink, Xiaofei Xiao, John Yang, William J. Peveler, Alasdair W. Clark, George Perrakis, Anna C. Tasolamprou, Maria Kafesaki, Anastasiia Zaleska, Wayne Dickson, David Richards, Anatoly Zayats, Haoran Ren, Yuri Kivshar, Stefan Maier, Xianzhong Chen, Muhammad Afnan Ansari, Yuhui Gan, Arseny Alexeev, Thomas F. Krauss, Andrea Di Falco, Sylvain D. Gennaro, Tomás Santiago-Cruz, Igal Brener, Maria V. Chekhova, Ren Min Ma, Viola V. Vogler-Neuling, Helena C. Weigand, Ülle Linda Talts, Irene Occhiodori, Rachel Grange, Mohsen Rahmani, Lei Xu, S. M. Kamali, E. Arababi, Andrei Faraon, Anthony C. Harwood, Stefano Vezzoli, Riccardo Sapienza, Philippe Lalanne, Alexandre Dmitriev, Carsten Rockstuhl, Alexander Sprafke, Kevin Vynck, Jeremy Upham, M. Zahirul Alam, Israel De Leon, Robert W. Boyd, Willie J. Padilla, Jordan M. Malof, Aloke Jana, Zijin Yang, Rémi Colom, Qinghua Song, Patrice Genevet, Karim Achouri, Andrey B. Evlyukhin, Ulrich Lemmer, Ivan Fernandez-Corbaton
2024
Applied Physics Letters
Hybridization of electromagnetic multipoles in a nanoscatterer in the presence of another nanoscatterer
Sagar Sehrawat, Radoslaw Kolkowski, Andriy Shevchenko
2024
New Journal of Physics
Near-field enhancement of light by higher-order multipole excitations in a metal nanodisc trimer
Sagar Sehrawat, Andriy Shevchenko
2024
Optics Express
Octupole plasmon resonance improves light enhancement by a metal nanodimer
Sagar Sehrawat, Andriy Shevchenko
2024
Optics Letters
Research group members
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