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Pertti Pääkkönen

Pertti Pääkkönen

Senior Laboratory Manager

Department of Physics and Mathematics, Faculty of Science, Forestry and Technology

[email protected] | +358 50 505 6376

Information Publications

Keywords

cleanrooms institute of photonics metrology optical design optics photonics

Publications

51/51 items

Observation of enhanced epsilon-near-zero effects in resonant stratified media
Calpe, Roman; Karvinen, Petri; Paakkonen, Pertti; Ornigotti, Marco; Caglayan, Humeyra; Turunen, Jari; Hakala, Tommi K; Koivurova, Matias, 2024, Applied physics letters, 124, 9, 091701. A1 Journal article (refereed), original research
Characterization of the Pore Structure of Functionalized Calcium Carbonate Tablets by Terahertz Time-Domain Spectroscopy and X-ray Computed Microtomography
Markl Daniel, Wang Parry, Ridgway Cathy, Karttunen Anssi-Pekka, Chakraborty Mousumi, Bawuah Prince, Pääkkönen Pertti, Gane Patrick, Ketolainen Jarkko, Peiponen Kai, Zeitler J Axel, 2017, Journal of pharmaceutical sciences, 106, 6, 1586-1595. A1 Journal article (refereed), original research
On the Correlation of Effective Terahertz Refractive Index and Average Surface Roughness of Pharmaceutical Tablets
Chakraborty Mousumi, Bawuah Prince, Tan Nicholas, Ervasti Tuomas, Pääkkönen Pertti, Zeitler J Axel, Ketolainen Jarkko, Peiponen Kai-Erik, 2016, Journal of infrared, millimeter, and terahertz waves, First online: 14 March 2016, 1-10. A1 Journal article (refereed), original research
Thermo-Optical Properties of Thin-Film TiO2-Al2O3 Bilayers Fabricated by Atomic Layer Deposition
Ali Rizwan, Saleem Muhammad Rizwan, Pääkkönen Pertti, Honkanen Seppo, 2015, Nanomaterials, 5, 2, 792-803. A1 Journal article (refereed), original research
Detection of porosity of pharmaceutical compacts by terahertz radiation transmission and light reflection measurement techniques
Bawuah Prince, Pierotic Mendia Alessandra, Silfsten Pertti, Pääkkönen Pertti, Ervasti Tuomas, Ketolainen Jarkko, Zeitler J. Axel, Peiponen Kai-Erik, 2014, International journal of pharmaceutics, Volume 465, Issues 1-2, 70-76. A1 Journal article (refereed), original research
Manufacturing of Freeform Mirror by Milling and Altering its Optical Characteristics by ns-laser Polishing and ALD Coatings
Mutanen Jarkko, Kaakkunen J. J. Jarno, Tuovinen Hemmo, Hiltunen Jouni, Kivi Sini, Toiviainen Maunu, Väyrynen Juha, Laukkanen Janne, Prokofiev Victor, Pääkkönen Pertti, Juuti Mikko, Kuittinen Markku, Mönkkönen Kari, 2014, Johnson Barry R, Mahajan Virendra N., Thibault Simon, Current Developments in Lens Design and Optical Engineering XV, 91921E-1-91921E-7. A3 Book section, Chapters in research books
Investigation of inverse polarization transmission through subwavelength metallic gratings in deep ultraviolet band
Kang Guoguo, Dong Jianjie, Vartiainen Ismo, Pääkkönen Pertti, Turunen Jari, 2013, Optics communications, 311, 33-37. A1 Journal article (refereed), original research
Roughness analysis for textured surfaces over several orders of magnitudes
Vepsäläinen L, Stenberg P, Pääkkönen P, Kuittinen M, Suvanto, M, Pakkanen TA, 2013, Applied surface science, 284, 222-228. A1 Journal article (refereed), original research
Assessment of wavelength dependent complex refractive index of strongly light absorbing liquids
Räty Jukka, Pääkkönen Pertti, Peiponen Kai-Erik, 2012, Optics express, 20, 3, 2835 - 2843. A1 Journal article (refereed), original research
Combining UV-replication techniques with injection moulded polymer optics
Mutanen Jarkko, Väyrynen Juha, Siitonen Samuli, Kauppila Antti, Partanen Anni, Pääkkönen Pertti, Tuovinen Hemmo, Itkonen Tommi, Kuittinen Markku, Niemi Janne, Mönkkönen Kari, 2012, Shore P, Spaan H, Burke T, Proceedings of the 12th international conference of the european society for precision engingeering and nanotechnology Vol1-2, 229V2-232V2, International conference of the european society for precision engingeering and nanotechnology. A4 Conference proceedings
Fabrication of Terahertz Wire-Grid Polarizers
Partanen A, Väyrynen J, Hassinen S, Tuovinen H, Mutanen J, Itkonen T, Silfsten P, Pääkkönen P, Kuittinen M, Mönkkönen K, Venäläinen T, 2012, European Optical Society, Proc. of 8th EOS Topical Meeting on Diffractive Optics 2012, 1-2. B3 Non-refereed conference proceedings
Fabrication of terahertz wire-grid polarizers
Partanen Anni, Väyrynen Juha, Hassinen Sami, Tuovinen Hemmo, Mutanen Jarkko, Itkonen Tommi, Silfsten Pertti, Pääkkönen Pertti, Kuittinen Markku, Mönkkönen Kari, Venäläinen Tapani, 2012, Applied optics, vol. 51, 35, 8360-8365. A1 Journal article (refereed), original research
Frequency analysis of micropillar structured surfaces: a characterization and design tool for surface texturing
Vepsäläinen, L; Pääkkönen, P; Suvanto, M; Pakkanen, TA, 2012, Applied surface science, 263, 523-531. A1 Journal article (refereed), original research
Isolating contributions to gloss from surface mechanical and optical roughness, thin layer refractive index and wavelength filtering as a function of illumination and geometry of incidence
Gane Patrick, Silfsten Pertti, Tåg Carl-Mikael, Pääkkönen Pertti, Hiltunen Jouni, Kuivalainen Kalle, Oksman Antti, Peiponen Kai-Erik, 2012, Journal of print and media technology research, 2, 81 - 95. A1 Journal article (refereed), original research
Surface roughness and gloss study of prints: application of specular reflection at near infrared
Silfsten P, Dutta R, Pääkkönen P, Tåg C-M, Gane P A C, Peiponen K-E, 2012, Measurement science and technology, 23, 125202-1 -8. A1 Journal article (refereed), original research
The whole earth blazar telescope campaign on the intermediate BL Lac object 3C 66A in 2007-2008
M. Böttcher, K. Fultz, H. D. Aller, M. F. Aller, J. Apodaca, A. A. Arkharov, U. Bach, R. Bachev, A. Berdyugin, C. Buemi, P. Calcidese, P. Pääkkönen et al., 2009, The Astrophysical Journal, 694, 174-182. A1 Journal article (refereed), original research
Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006\-\-2007 outburst
C. M. Raiteri, Villata, M.; Larionov, V. M.; Aller, M. F; Pääkkönen, P. et al., 2008, Astronomy and astrophysics, -, 1 - 9. A1 Journal article (refereed), original research
The WEBT Campaign on the Intermediate BL Lac Object 3C 66A in 2007 ¿ 2008
M. Böttcher, K. Fultz, H. D. Aller, M. F. Aller, J. Apodaca, A. A. Arkharov, P. Pääkkönen et al., 2008, The Astrophysical Journal, arXiv:0811.0501v1. A1 Journal article (refereed), original research
WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase
C. M. Raiteri et al., 2007, Astronomy and astrophysics. A1 Journal article (refereed), original research
Four new binary minor planets: (854) Frostia, (1089) Tama, (1313) Berna, (4492) Debussy
R. Behrend;L. Bernasconi;R. Roy;A. Klotz;F. Colas;P. Antonini;R. Aoun;K. Augustesen;E. Barbotin;N. Berger;H. Berrouachdi;E. Brochard;A. Cazenave;C. Cavadore;J. Coloma;V. Cotrez;S. Deconihout;C. Demeautis;J. Dorseuil;G. Dubos;R. Durkee;E. Frappa;F. Hormuth;T. Itkonen;C. Jacques;L. Kurtze;A. Laffont;M. Lavayssière;J. Lecacheux;A. Leroy;F. Manzini;G. Masi;D. Matter;R. Michelsen;J. Nomen;A. Oksanen;P. Pääkkönen;A. Peyrot;E. Pimentel;D. Pray;C. Rinner;S. Sanchez;K. Sonnenberg;S. Sposetti;D. Starkey;R, 2006, Astron. Astrophys., 446, 11771184. A1 Journal article (refereed), original research
CW and pulsed operation of a diode-pumped Bessel-Gauss laser
A. Hakola;S.C. Butcher;T. Kajava;H. Elfström;J. Simonen;P. Pääkkönen;J. Turunen, 2005, Proceedings of CLEO Europe 2005. B2 Book section
Diffractive shaping of eximer-laser beams for pulsed laser deposition
A. Hakola;T. Kajava;H. Elfström;J. Simonen;P. Pääkkönen and J. Turunen, 2005, Journal of Physics: Conference series, COLA 2005. A3 Book section, Chapters in research books
Excimer-laser beam shaping using periodic diffractive elements
A. Hakola;T. Kajava;H. Elfström;J. Simonen;P. Pääkkönen;J. Turunen, 2005, Päivi Törmä;Jouko Korppi-Tommola;Viivi Lehtovuori, Optics Days-Optiikan päivät Proceedings 2005, 28. B2 Book section
The Recently-Discovered Dwarf Nova System ASAS J002511+1217.2: A New WZ Sagittae Star
M.R. Templeton;R. Leaman;P. Szkody;A. Henden;L. Cook;D. Starkey;A. Oksanen;M. Koppelman;D. Boyd;T. Vanmunster;R. Pickard;N. Quinn;R. Huziak;M. Aho;R. James;A. Golovin;R.I. Durkee;T.R. Crawford;G. Walker;and P. Paakkonen, 2005, Astrophysics. A1 Journal article (refereed), original research
Astimatic Bessel laser beams
S. N. Knonina;V. V. Kotlyar;V. A. Soifer;K. Jefimovs;P. Pääkkönen;J. Turunen, 2004, Journal of modern optics, 51, 5, 677-686. A1 Journal article (refereed), original research
BesselGauss output beam from a diode-pumped Nd:YAG laser
A. Hakola;S.C. Buchter;T. Kajava;H. Elfström;J. Simonen;P. Pääkkönen and J. Turunen, 2004, Optics communications, 238, 4-6, 335-340. A1 Journal article (refereed), original research
Diode-pumped Nd:YAG laser with a Bessel-Gauss output beam
A. Hakola;S. C. Butcher;T. Kajava;H. Elfström;J. Simonen;P. Pääkkönen;J. Turunen, 2004, Optics Days 2004. B2 Book section
Generation and selection of laser beams represented by a superposition of two angular harmonics
S.N. Khonina;V. V. Kotlyar;V. A. Soifer;K. Jefimovs;P. Pääkkönen;J. Turunen, 2004, Journal of modern optics, 51, 5, 761-773. A1 Journal article (refereed), original research
Planetary Transits of TRES-1
A. Price;R. Bissinger;G. Laughlin;B. Gary;T. Vanmunster;A. Henden;D. Starkey;D. Kaiser;J. Holtzman;L. Marshall;T. Michalik;T. Wellington;P. Paakkonen;Z.S. Kreszty;R. Durkee;K. Richardson;R. Leadbeater and T. Castellano, 2004, Journal of the American Association of Variable Star Observers, 34, 1 - 4. A1 Journal article (refereed), original research
Diode-pumped Nd:YVO4 laser with a diffractive cavity mirror
Hakola Antti;Kajava Timo;Elfström Henna;Simonen Janne;Pääkkönen Pertti;Turunen Jari, 2003, Northern Optics 2003, 30. B2 Book section
Diode-pumped Nd:YVO4 laser with a diffractive cavity mirror
Elfström Henna;Hakola Antti;Kajava Timo;Simonen Janne;Pääkkönen Pertti;Turunen Jari, 2003, Diffractive Optics. B2 Book section
GRB030329: Multicolor light curve and ionospheric detection
Price;A.; Achee;C. G.; Aquino;B.; Beaver;D.; Broens;E.; Brown;P.; Cherry;J. B.; Cole;J. K.; Cooney;W.; Dellinger;J.; Dilapo;T.; Dillon;B.; Dunckel;N.; Durig;D. T.; Fishman;G. J.; Garland;G. F.; Garossino;P.; Garossino;T.; Gary;B.; Gilmore;A.; Granslo;B.; Hambsch;J.; Henden;A.; Hohman;D.; Kaiser;D.; Kereszty;Z.; Kilmartin;P.; Liesmann;J.; Lubcke;G.; Mattei;J. A.; Monard;B.; Nelson;P.; Norton;C. B.; Oksanen;A.; Paakkonen;P.; Schrabback;T.; Schnoor;P. W.; Seifert;A. L.; Starkey;D.; Swamickannu;J. P, 2003, Information Bulletin on Variable Stars, 5415. B1 Non-refereed journal articles
General vectorial decomposition of electromagnetic fields with application to propagation-invariant and rotating fields
Pääkkönen Pertti;Tervo Jani;Vahimaa Pasi;Turunen Jari;Gori Franco, 2002, Optics express, 10, 949-959. A1 Journal article (refereed), original research
Partially coherent Gaussian pulses
Pertti Pääkkönen;Jari Turunen;Pasi Vahimaa;Ari T. Friberg;and Frank Wyrowski, 2002, Optics communications, 204, 53-58. A1 Journal article (refereed), original research
Replication of Sub-Micron Features Using Amorphous Thermoplastics
Kari Mönkkönen;Joni Hietala;Pertti Pääkkönen;Esko J. Pääkkönen;Terho Kaikuranta;Tuula T. Pakkanen;Timo Jääskeläinen, 2002, Polymer engineering and science, 42, 7, 1600-1608. B1 Non-refereed journal articles
Two-element diffractive system for generation of Bessel fields
Pääkkönen Pertti;Simonen Janne;Honkanen Marko;Turunen Jari, 2002, Journal of modern optics, 49, 11, 1943-1953. A1 Journal article (refereed), original research
Wireless infrared data links: ray-trace simulations of diffuse channelsand demonstration of diffractive element for multi-beam transmitters
Mikko Karppinen;Kari J. Kataja;Jukka-Tapani Maekinen;Sanna M. Aikio;Hannu Rajaniemi;Pertti Paeaekkoenen;Jari P. Turunen;Juha T. Rantala;Pentti Karioja, 2002, Optical engineering, 41, 899-910. A1 Journal article (refereed), original research
An analysis of the angular momentum of a light field in terms of angular harmonics
Khonina Svetlana;Kotlyar V;Soifer V;Pääkkönen Pertti;Simonen Janne;Turunen Jari, 2001, Journal of modern optics, 48, 10, 1543-1557. A1 Journal article (refereed), original research
Beam formation and shaping by means of diffrctive optics
Pertti Pääkkönen, 2001, University of Joensuu. C1 Book
Tandem diffractive system for generation of Bessel beams
Simonen Janne;Pääkkönen Pertti;Honkanen Marko;Turunen Jari, 2001, Optics Days 2001 Proceedings. B2 Book section
Diffractive shaping of excimer laser beams
Turunen Jari;Pääkkönen Pertti;Kuittinen Markku;Laakkonen Pasi;Simonen Janne;Kajava Timo;Kaivola Matti, 2000, Journal of modern optics, 47, 13, 2467-2475. A1 Journal article (refereed), original research
Excimer beam shaping using diffractive optics
Kajava Timo;Kaivola Matti;Turunen Jari;Pääkkönen Pertti;Kuittinen Markku;Laakkonen Pasi;Simonen Janne, 2000, The 2000 Conference on Lasers and Electro-Optics (CLEO)/Europe. B2 Book section
Geometrical multiple scattering model for grating diffraction
Pertti Pääkkönen. Eero Noponen;Jari Turunen, 1999, EOS Topical Meetings Digest Series, 121-122. A3 Book section, Chapters in research books
Laser-diode beam collimator based on surface-relief Bragg elements
Jari Turunen;Marko Honkanen;Ville Kettunen;Markku Kuittinen;Jari Lautanen;Pertti pääkkönen, 1999, EOS Topical Meetings Digest Series, 250-251. A3 Book section, Chapters in research books
Multi-Beam 2D acousto-optical modulator combined with arrays of diffractive elements
Sz. Tökes;I. Kas;P. Pääkkönen;and V. Kettunen, 1999, EOS Topical Meetings Digest Series, 78-79. A3 Book section, Chapters in research books
Polarization Dependent Diffractive Devices
Markku Kuittinen;Pasi Vahimaa;Pertti Pääkkönen, 1999, 3rd Finnish Optics Days Proceedings. A3 Book section, Chapters in research books
Diffractive elements for generation of propagation-invariant, rotating, and self-reproducing fields
S. N. Khonina;V. V. Kotlyar;V. A. Soifer;P. Pääkkönen;J. Lautanen;M. Honkanen;M. Kuittinen;J. Turunen;and Ari T. Friberg, 1998, Diffractive optics and Micro-Optics, 299-301. A3 Book section, Chapters in research books
Iterative model for wave propagation in Kerr media
Pertti Pääkkönen;Pasi Vahimaa;Ari T Friberg and Jari Turunen, 1998, Pure and Applied Optics, 7, 1033-1042. A1 Journal article (refereed), original research
Laser resonators with Bessel-Gauss modes: design and analysis
P. Pääkkönen and J. Turunen, 1998, Optika '98, 5th Congress on Modern optics, 478-481. A3 Book section, Chapters in research books
Resonators with BesselGauss modes
Pertti Pääkkönen and Jari Turunen, 1998, Optics communications, 156, 359-366. A1 Journal article (refereed), original research
Rotating optical fields: experimental demonstration with diffractive optics
P. Pääkkönen;J. Lautanen;M. Honkanen;M. Kuittinen;J. Turunen;S. N. Khonina;V. V. Kotlyar;V. A. Soifer;A. T. Friberg, 1998, Journal of modern optics, 45, 11, 2355-2369. A1 Journal article (refereed), original research

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Pertti Pääkkönen

Keywords

Observation of enhanced epsilon-near-zero effects in resonant stratified media

Characterization of the Pore Structure of Functionalized Calcium Carbonate Tablets by Terahertz Time-Domain Spectroscopy and X-ray Computed Microtomography

On the Correlation of Effective Terahertz Refractive Index and Average Surface Roughness of Pharmaceutical Tablets

Thermo-Optical Properties of Thin-Film TiO2-Al2O3 Bilayers Fabricated by Atomic Layer Deposition

Detection of porosity of pharmaceutical compacts by terahertz radiation transmission and light reflection measurement techniques

Manufacturing of Freeform Mirror by Milling and Altering its Optical Characteristics by ns-laser Polishing and ALD Coatings

Investigation of inverse polarization transmission through subwavelength metallic gratings in deep ultraviolet band

Roughness analysis for textured surfaces over several orders of magnitudes

Assessment of wavelength dependent complex refractive index of strongly light absorbing liquids

Combining UV-replication techniques with injection moulded polymer optics

Fabrication of Terahertz Wire-Grid Polarizers

Fabrication of terahertz wire-grid polarizers

Frequency analysis of micropillar structured surfaces: a characterization and design tool for surface texturing

Isolating contributions to gloss from surface mechanical and optical roughness, thin layer refractive index and wavelength filtering as a function of illumination and geometry of incidence

Surface roughness and gloss study of prints: application of specular reflection at near infrared

The whole earth blazar telescope campaign on the intermediate BL Lac object 3C 66A in 2007-2008

Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006\-\-2007 outburst

The WEBT Campaign on the Intermediate BL Lac Object 3C 66A in 2007 ¿ 2008

WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase

Four new binary minor planets: (854) Frostia, (1089) Tama, (1313) Berna, (4492) Debussy

CW and pulsed operation of a diode-pumped Bessel-Gauss laser

Diffractive shaping of eximer-laser beams for pulsed laser deposition

Excimer-laser beam shaping using periodic diffractive elements

The Recently-Discovered Dwarf Nova System ASAS J002511+1217.2: A New WZ Sagittae Star

Astimatic Bessel laser beams

BesselGauss output beam from a diode-pumped Nd:YAG laser

Diode-pumped Nd:YAG laser with a Bessel-Gauss output beam

Generation and selection of laser beams represented by a superposition of two angular harmonics

Planetary Transits of TRES-1

Diode-pumped Nd:YVO4 laser with a diffractive cavity mirror

Diode-pumped Nd:YVO4 laser with a diffractive cavity mirror

GRB030329: Multicolor light curve and ionospheric detection

General vectorial decomposition of electromagnetic fields with application to propagation-invariant and rotating fields

Partially coherent Gaussian pulses

Replication of Sub-Micron Features Using Amorphous Thermoplastics

Two-element diffractive system for generation of Bessel fields

Wireless infrared data links: ray-trace simulations of diffuse channelsand demonstration of diffractive element for multi-beam transmitters

An analysis of the angular momentum of a light field in terms of angular harmonics

Beam formation and shaping by means of diffrctive optics

Tandem diffractive system for generation of Bessel beams

Diffractive shaping of excimer laser beams

Excimer beam shaping using diffractive optics

Geometrical multiple scattering model for grating diffraction

Laser-diode beam collimator based on surface-relief Bragg elements

Multi-Beam 2D acousto-optical modulator combined with arrays of diffractive elements

Polarization Dependent Diffractive Devices

Diffractive elements for generation of propagation-invariant, rotating, and self-reproducing fields

Iterative model for wave propagation in Kerr media

Laser resonators with Bessel-Gauss modes: design and analysis

Resonators with BesselGauss modes

Rotating optical fields: experimental demonstration with diffractive optics