Prof. Risto Myllylä Profile

Prof. Risto Myllylä

Professor at Univ of Oulu

SPIE Involvement:

Author

Publications (147)

Proceedings Article | 8 October 2014 Paper

Two-color emission in three-layer heterostructure OLETs

K. Jokinen, A. Bykov, T. Fabritius, R. Myllylä

Proceedings Volume 9183, 91831Q (2014) https://doi.org/10.1117/12.2060661

KEYWORDS: Organic light emitting transistors, Electron transport, Organic light emitting diodes, Heterojunctions, Transistors, Electrodes, Silver, Field effect transistors, Polymethylmethacrylate, Doping

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Proceedings Article | 30 January 2014 Paper

Optical tweezers-assisted measurements of elastic light scattering

M. Kinnunen, J. Tuorila, T. Haapalainen, A. Karmenyan, V. Tuchin, R. Myllylä

Proceedings Volume 9031, 90310A (2014) https://doi.org/10.1117/12.2051443

KEYWORDS: Light scattering, Scattering, Refractive index, Optical tweezers, Particles, Laser scattering, Optical spheres, Optical testing, Optical clearing, Scatter measurement

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Proceedings Article | 5 March 2013 Paper

Inkjet printed microlens array on patterned substrate

P. Vilmi, R. Myllylä, T. Fabritius

Proceedings Volume 8613, 861317 (2013) https://doi.org/10.1117/12.2001045

KEYWORDS: Printing, Optical lithography, Inkjet technology, Photoresist materials, Microscopes, Liquids, Microscopy, Lithography, Profilometers, Objectives

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Proceedings Article | 11 December 2012 Paper

Photo-acoustic excitation and detection of guided ultrasonic waves in bone samples covered by a soft coating layer

Zuomin Zhao, Petro Moilanen, Pasi Karppinen, Mikko Määttä, Timo Karppinen, Edward Hæggström, Jussi Timonen, Risto Myllylä

Proceedings Volume 8553, 85531E (2012) https://doi.org/10.1117/12.999297

KEYWORDS: Bone, Coating, Tissue optics, Ultrasonics, Waveguides, Soft tissue optics, Skin, Ultrasonography, Phase velocity, Signal detection

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Proceedings Article | 13 September 2012 Paper

Organic solvent wetting properties of UV and plasma treated ZnO nanorods: printed electronics approach

Rafal Sliz, Yuji Suzuki, Arokia Nathan, Risto Myllyla, Ghassan Jabbour

Proceedings Volume 8477, 84771G (2012) https://doi.org/10.1117/12.929631

KEYWORDS: Ultraviolet radiation, Zinc oxide, Argon, Oxygen, Solar cells, Plasma, Plasma treatment, Printing, Organic photovoltaics, Nanorods

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Proceedings Article | 13 September 2012 Paper

Characterization of ink-jet printed RGB color filters with spectral domain optical coherence tomography

J. Czajkowski, P. Vilmi, J. Lauri, R. Sliz, T. Fabritius, R. Myllylä

Proceedings Volume 8493, 849308 (2012) https://doi.org/10.1117/12.929681

KEYWORDS: Optical coherence tomography, Optical filters, Light sources, Profilometers, Imaging systems, Glasses, RGB color model, Data acquisition, Cameras, Photoresist materials

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Proceedings Article | 22 May 2012 Paper

Interferometric polymer optical sensor for intravascular optoacoustic imaging

Daniel Gallego, Horacio Lamela, Meng Wang, Jussi Hiltunen, Matti Kinnunen, Risto Myllylä

Proceedings Volume 8370, 83700T (2012) https://doi.org/10.1117/12.920461

KEYWORDS: Sensors, Polymers, Acoustics, Polymeric sensors, Transducers, Interferometry, Ultrasonics, Polymer multimode waveguides, Ferroelectric materials, Waveguides

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Proceedings Article | 8 May 2012 Paper

Two-photon-excited autofluorescence and second-harmonic generation microscopy for the visualization of penetration of TiO2 and ZnO nanoparticles into human tooth tissue ex vivo

Natalia Trunina, Alexey Popov, Jürgen Lademann, Valery Tuchin, Risto Myllylä, Maxim Darvin

Proceedings Volume 8427, 84270Y (2012) https://doi.org/10.1117/12.924073

KEYWORDS: Nanoparticles, Teeth, Second-harmonic generation, Zinc oxide, Atrial fibrillation, Tissues, Ultrasonography, Microscopy, Visualization, Titanium dioxide

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Proceedings Article | 5 May 2012 Paper

Sub-micron resolution high-speed spectral domain optical coherence tomography in quality inspection for printed electronics

J. Czajkowski, J. Lauri, R. Sliz, P. Fält, T. Fabritius, R. Myllylä, B. Cense

Proceedings Volume 8430, 84300K (2012) https://doi.org/10.1117/12.922443

KEYWORDS: Optical coherence tomography, Electronics, Inspection, Light sources, Spectroscopy, Signal to noise ratio, Epoxies, Spectral resolution, Antennas, Interferometers

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Proceedings Article | 2 May 2012 Paper

Characterization of microcrystalline I-layer for solar cells prepared in low temperature - plastic compatible process

Rafal Sliz, Arman Ahnood, Arokia Nathan, Risto Myllyla, Ghassan Jabbour

Proceedings Volume 8438, 84381E (2012) https://doi.org/10.1117/12.922302

KEYWORDS: Solar cells, Crystals, Plasma enhanced chemical vapor deposition, Microcrystalline materials, Silicon, Raman spectroscopy, Solar energy, FT-IR spectroscopy, Transmission electron microscopy, Manufacturing

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Proceedings Article | 1 May 2012 Paper

Behaviour of electron and hole currents in a 3-layer heterostructure OLET

K. Jokinen, A. Bykov, R. Sliz, R. Myllyla

Proceedings Volume 8435, 84351L (2012) https://doi.org/10.1117/12.921286

KEYWORDS: Organic light emitting transistors, Organic light emitting diodes, Heterojunctions, Field effect transistors, Electron transport, Dielectrics, Polymethylmethacrylate, External quantum efficiency, Electrodes, Transistors

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Proceedings Article | 23 February 2012 Paper

Polymer inverted-rib optical waveguide interferometric sensor for optoacoustic imaging

Daniel Gallego, Meng Wang, Jussi Hiltunen, Risto Myllylä, Horacio Lamela

Proceedings Volume 8223, 822343 (2012) https://doi.org/10.1117/12.910826

KEYWORDS: Sensors, Waveguides, Polymers, Interferometry, Acoustics, Polymeric sensors, Polymer multimode waveguides, Ultrasonics, Transducers, Optical fibers

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Proceedings Article | 9 September 2011 Paper

Elastic light scattering measurements from multiple red blood cells in elliptical optical tweezers

Antti Kauppila, Matti Kinnunen, Artashes Karmenyan, Risto Myllylä

Proceedings Volume 8097, 80970K (2011) https://doi.org/10.1117/12.893383

KEYWORDS: Light scattering, Scattering, Optical tweezers, Scatter measurement, Optical testing, Laser scattering, Blood, Helium neon lasers, Particles, Refractive index

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Proceedings Article | 16 June 2011 Paper

Instrumentation and method for measuring NIR light absorbed in tissue during MR imaging in medical NIRS measurements

Teemu Myllylä, Hannu S. Sorvoja, Juha Nikkinen, Osmo Tervonen, Vesa Kiviniemi, Risto Myllylä

Proceedings Volume 8090, 80900Y (2011) https://doi.org/10.1117/12.889677

KEYWORDS: Magnetic resonance imaging, Near infrared, Light emitting diodes, Brain, Tissue optics, Scanners, Functional magnetic resonance imaging, Modulation, Silicon, Signal attenuation

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Proceedings Article | 16 June 2011 Paper

Upconversion luminophores as a novel tool for deep tissue imaging

Alexey Popov, Alexander Bykov, Victor Sokolov, Yulia Lysak, Annemarie Nadort, Alexander Priezzhev, Risto Myllylä, Andrei Zvyagin

Proceedings Volume 8090, 80900V (2011) https://doi.org/10.1117/12.889967

KEYWORDS: Upconversion, Tissues, Monte Carlo methods, Luminescence, Scattering, Deep tissue imaging, Mie scattering, Particles, Tissue optics, Nanoparticles

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Proceedings Article | 7 June 2011 Paper

Multilayer tissue phantoms with embedded capillary system for OCT and DOCT imaging

Alexander Bykov, Alexey Popov, Alexander Priezzhev, Risto Myllyla

Proceedings Volume 8091, 80911R (2011) https://doi.org/10.1117/12.889923

KEYWORDS: Optical coherence tomography, Scattering, Capillaries, Particles, Mie scattering, Manufacturing, Imaging systems, Skin, Tissues, Titanium dioxide

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Proceedings Article | 12 February 2011 Paper

Fast retinal layer identification for optical coherence tomography images

Tapio Fabritius, Shuichi Makita, Masahiro Miura, Yoshiaki Yasuno, Risto Myllylä

Proceedings Volume 7889, 788933 (2011) https://doi.org/10.1117/12.873304

KEYWORDS: Image segmentation, Optical coherence tomography, Digital filtering, Data processing, Eye, Macula, Tissues, Retina, Statistical analysis, Imaging systems

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Proceedings Article | 25 November 2010 Paper

Fabrication of polymer waveguide devices for sensor applications

Mu Cheng, Jussi Hiltunen, Meng Wang, Antti Suutala, Pentti Karioja, Risto Myllylä

Proceedings Volume 7376, 73761A (2010) https://doi.org/10.1117/12.871119

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Refractive index, Sensors, Nanoimprint lithography, Light sources, Absorption, Polymer thin films, Lithography

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Proceedings Article | 25 November 2010 Paper

Skin phantoms with realistic vessel structure for OCT measurements

A. Bykov, A. Popov, M. Kinnunen, T. Prykäri, A. V. Priezzhev, R. Myllylä

Proceedings Volume 7376, 73760F (2010) https://doi.org/10.1117/12.872000

KEYWORDS: Optical coherence tomography, Skin, Mie scattering, Scattering, Capillaries, Optical properties, Particles, Tissues, Manufacturing, Titanium dioxide

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Proceedings Article | 25 November 2010 Paper

Evaluation of microfluidic channels with optical coherence tomography

J. Czajkowski, T. Prykäri, E. Alarousu, J. Lauri, R. Myllylä

Proceedings Volume 7376, 737617 (2010) https://doi.org/10.1117/12.871445

KEYWORDS: Microfluidics, Optical coherence tomography, Interfaces, Data processing, Refractive index, Polymers, Image segmentation, Photonic crystal fibers, Light sources, Interferometers

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Proceedings Article | 25 November 2010 Paper

Laser-induced microbubbles in gold and oxide nanoparticle suspensions: photoacoustic detection

Z. Zhao, R. Myllylä

Proceedings Volume 7376, 737606 (2010) https://doi.org/10.1117/12.871461

KEYWORDS: Particles, Gold, Zinc oxide, Nanoparticles, Pulsed laser operation, Oxides, Photoacoustic spectroscopy, Laser damage threshold, Laser therapeutics, Titanium dioxide

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Proceedings Article | 25 November 2010 Paper

Measurement of light scattering from trapped particles

Mikael Collins, Antti Kauppila, Artashes Karmenyan, Lech Gajewski, Krzysztof Szewczyk, Matti Kinnunen, Risto Myllylä

Proceedings Volume 7376, 737619 (2010) https://doi.org/10.1117/12.871613

KEYWORDS: Light scattering, Particles, Scatter measurement, Optical testing, Optical spheres, Scattering, Objectives, Sensors, Blood, Optical tweezers

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Proceedings Article | 18 May 2010 Paper

ZnO and TiO2 particles: a study on nanosafety and photoprotection

Alexey Popov, Xin Zhao, Andrei Zvyagin, Jürgen Lademann, Michael Roberts, Washington Sanchez, Alexander Priezzhev, Risto Myllylä

Proceedings Volume 7715, 77153G (2010) https://doi.org/10.1117/12.854561

KEYWORDS: Particles, Zinc oxide, Skin, Nanoparticles, Ultraviolet radiation, Absorption, In vivo imaging, Reflectivity, In vitro testing, Titanium dioxide

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Proceedings Article | 18 May 2010 Paper

Effect of light scattering superficial layer on the accuracy of flow velocity profiles measurements by Doppler optical coherence tomography

J. Lauri, Alexander Bykov, Alexander Priezzhev, R. Myllylä

Proceedings Volume 7715, 77152L (2010) https://doi.org/10.1117/12.854223

KEYWORDS: Velocity measurements, Capillaries, Doppler effect, Doppler tomography, Glasses, Scattering, Optical coherence tomography, Photons, Tissues, Skin

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Proceedings Article | 18 February 2010 Paper

PDMS surface modification in the application of waveguide claddings for evanescent field sensing

Meng Wang, Sanna Uusitalo, Risto Myllylä, Leena Hakalahti, Markku Känsäkoski

Proceedings Volume 7593, 759317 (2010) https://doi.org/10.1117/12.841244

KEYWORDS: Waveguides, Cladding, Refractive index, Plasma treatment, Oxygen, Plasma, Light wave propagation, Prisms, Glasses, Interferometry

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Proceedings Article | 12 February 2010 Paper

MRI-compatible noninvasive continuous blood pressure measurement using fiber optics

Juha Harja, Teemu Myllylä, Risto Myllylä

Proceedings Volume 7547, 75470F (2010) https://doi.org/10.1117/12.855056

KEYWORDS: Magnetic resonance imaging, Sensors, Blood pressure, Scanners, Chest, Optical testing, Fiber optics, Electronics, Heart, Fiber optics tests

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Proceedings Article | 8 July 2009 Paper

Interaction of sunscreen TiO2 nanoparticles with skin and UV light: penetration, protection, phototoxicity

Alexey Popov, Jürgen Lademann, Alexander Priezzhev, Risto Myllylä

Proceedings Volume 7368, 736822 (2009) https://doi.org/10.1117/12.831573

KEYWORDS: Particles, Skin, Ultraviolet radiation, Nanoparticles, Silicon, In vitro testing, Glasses, Absorption, Sun, Titanium dioxide

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SPIE Journal Paper | 1 March 2009 Open Access

Effect of size of TiO2 nanoparticles applied onto glass slide and porcine skin on generation of free radicals under ultraviolet irradiation

Alexey Popov, Stefan Haag, Martina Meinke, Jürgen Lademann, Alexander Priezzhev, Risto Myllylä

JBO, Vol. 14, Issue 02, 021011, (March 2009) https://doi.org/10.1117/12.10.1117/1.3078802

KEYWORDS: Particles, Skin, Ultraviolet radiation, Glasses, Nanoparticles, Principal component analysis, In vitro testing, Absorption, Ear, Titanium dioxide

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Proceedings Article | 20 February 2009 Paper

Automated retinal pigment epithelium identification from optical coherence tomography images

Tapio Fabritius, Shuichi Makita, Risto Myllylä, Yoshiaki Yasuno

Proceedings Volume 7168, 716827 (2009) https://doi.org/10.1117/12.808543

KEYWORDS: Optical coherence tomography, Image segmentation, Retina, Eye, Data processing, Polarization, 3D image processing, Ophthalmology, Tissues, Biomedical optics

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SPIE Journal Paper | 1 January 2009 Open Access

Automated retinal shadow compensation of optical coherence tomography images

Tapio Fabritius, Shuichi Makita, Yongjoo Hong, Risto Myllylä, Yoshiaki Yasuno

JBO, Vol. 14, Issue 01, 010503, (January 2009) https://doi.org/10.1117/12.10.1117/1.3076204

KEYWORDS: Optical coherence tomography, Image segmentation, 3D image processing, Angiography, Optical discs, Signal attenuation, Time metrology, Macula, Numerical analysis, In vivo imaging

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Proceedings Article | 2 December 2008 Paper

Fiber-optic biosensor based on self-mixing interferometry

Miia Määttälä, Janne Lauri, Matti Kinnunen, Jukka Hast, Risto Myllylä

Proceedings Volume 7142, 71420I (2008) https://doi.org/10.1117/12.815269

KEYWORDS: Refractive index, Interferometry, Interferometers, Optical fibers, Cladding, Fiber optics, Semiconductor lasers, Fringe analysis, Mirrors, Sensors

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Proceedings Article | 2 December 2008 Paper

Pulsed photoacoustic measurements of suspensions: in case study of mitochnodrial NADH and its phantom

Zuomin Zhao, Jukka Hast, Risto Myllylä, Markku Känsäkoski

Proceedings Volume 7142, 714213 (2008) https://doi.org/10.1117/12.815279

KEYWORDS: Photoacoustic spectroscopy, Absorption, Transducers, Absorbance, Scattering, Signal detection, Analytical research, Statistical analysis, Light scattering, Oxidation

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