Publications

Journal articles

2018

• B. M. M. Faustino, D. Gomes, J. Faria, T. Juntunen, G. Gaspar, C. Bianchi, A. Almeida, A. Marques, I. Tittonen, and I. Ferreira, "Cul p-type thin films for highly transparent thermoelectric p-n modules", Scientific Reports 8, 6867.

• T. Juntunen, H. Jussila, M. Ruoho, S. Liu, G. Hu, T. Albrow-Owen, L. W. T. Ng, R. C. T. Howe, T. Hasan, Z. Sun, and I. Tittonen, "Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics", Advanced Functional Materials 28, 1800480.

2017

• V. Pale, Z. Giedraityte, X. Chen, O. Lopez-Acevedo, I. Tittonen, and M. Karppinen, "Excitation-dependent fluorescence from atomic/molecular layer deposited sodium-uracil thin films", Scientific Reports 7, 6982.

• J. Figueira, J. Loureiro, J. Marques, C. Bianchi, P. Duarte, M. Ruoho, I. Tittonen, and I. Ferreira, "Optimization of Cuprous Oxides Thin Films to be used as Thermoelectric Touch Detectors", ACS Applied Materials & Interfaces 9, 6520-6529.

• Z. Liu, A. Shah, T. Alasaarela, N. Chekurov, H. Savin, and I. Tittonen, "Silicon dioxide mask by plasma enhanced atomic layer deposition in focused ion beam lithography", Nanotechnology 28, 085303.

2016

• V. Dhaka, V. Pale, V. Khayrudinov, J. P. Kakko, T. Haggren, H. Jiang, E. Kauppinen, and H. Lipsanen, "Synthesis and properties of ultra-long InP nanowires on glass", Nanotechnology 27, 505606.

• Z. Giedraityte, O. Lopez-Acavedo, L. Andres Espinosa Leal, V. Pale, J. Sainio, T. S. Tripathi, and M. Karppinen, "Three-dimensional uracil network with sodium as a linker", J. Phys. Chem. C, 120, 26342−26349.

• M. Ruoho, T. Juntunen, T. Alasaarela, M. Pudas, and I. Tittonen, "Transparent, flexible, and passive thermal touch panel", Adv. Mater. Technol. 1, 1600204.

• S. Ali, T. Juntunen, S. Sintonen, O. M. Ylivaara, R. L. Puurunen, H. Lipsanen, I. Tittonen, and S. P. Hannula, "Thermal conductivity of amorphous Al2O3/TiO2 nanolaminates deposited by atomic layer deposition", Nanotechnology 27, 445704.

• M. Ruoho, T. Juntunen, and I. Tittonen, "Large-area thermoelectric high-aspect-ratio nanostructures by atomic layer deposition", Nanotechnology 27, 355403.

• V. Pale, C. Kauppinen, J. Selin, M. Sopanen, and I. Tittonen, "Fluorescence-enhancing plasmonic silver nanostructures using azopolymer lithography", RSC Advances 6, 48129 - 48136.

2015

• H. Yang, B. Fu, D. Li, Y. Tian, Y. Chen, M. Mattila,  Z. Yong, R. Li, A. Hassanien, C. Yang, I. Tittonen, Z. Ren, J. Bai, Q. Li, E. Kauppinen, H. Lipsanen, and Z. Sun, "Broadband laser polarization control with aligned carbon nanotubes", Nanoscale 7, 11199-11205.

• O. Hahtela, M. Ruoho, E. Mykkänen, K. Ojasalo J. Nissilä, A. Manninen, and M. Heinonen, "Thermal-Conductivity Measurement of Thermoelectric Materials Using 3ω Method", Int. J. Thermophys. 36:3255–3271.

• M. Ruoho, K. Valset, T. Finstad, and I. Tittonen, "Measurement of  thin film thermal conductivity using laser flash method", Nanotechnology 26, 195706.

• J. V. Nieminen, O. Vänskä, I. Tittonen, S. W. Koch, and M. Kira, "Accessing orbital angular momentum of quantum-ring excitons via directional semiconductor luminescence", New J. Phys. 17,033046.

•  O. Vänskä, I. Tittonen, S. W. Koch, and M. Kira, "Coherent terahertz control of vertical transport in semiconductor heterostructures", Phys. Rev. Lett. 114, 116802.

2014

• M. Erdmanis, P. Sievilä, A. Shah, N. Chekurov, V. Ovchinnikov, and I. Tittonen, "Focused ion beam lithography for fabrication of suspended nanostructures on highly corrugated surfaces", Nanotechnology 25, 335302.

• O. Vänskä, J. Nieminen, M. Kira, S. W. Koch, and I. Tittonen, "Structure-independent semiconductor luminescence equations for quantum rings", Phys. Scr. T160, 014044.

• M. Erdmanis and I. Tittonen, "Focused Ion Beam High Resolution Grayscale Lithography for Silicon-Based Nanostructures", Appl. Phys. Lett. 104, 073118.

• Y. Chen, G.G. Kang, A. Shah, V. Pale, Y. Tian, Z.P. Sun, I. Tittonen, S. Honkanen, and H. Lipsanen, "Improved SERS Intensity from Silver Coated Black Silicon by Tuning Surface Plasmons." Adv. Mater. Int. 1, 1300008.

2013

• M. Ruoho, V. Pale, M. Erdmanis, and I. Tittonen, "Influence of aluminium doping on thermoelectric performance of atomic layer deposited ZnO thin films." Appl. Phys. Lett. 103, 203903.

• J. Gronicz, N. Chekurov, M. Kosunen, and I. Tittonen, "Design and fabrication of a tuning fork shaped voltage controlled resonator for low-voltage applications with additional tuning electrodes." J. Micromech. Microeng. 23, 115004.

• T. Alasaarela, L. Karvonen, A. Säynätjoki, H. Jussila, S. Mehravar, R. Norwood, N. Peyghambarian, K. Kieu, I. Tittonen, and H. Lipsanen, “High quality crystallinity controlled ALD TiO2 for waveguiding applications." Opt. Lett. 38 , 3980.

• L. Karvonen, A. Säynätjoki, Y. Chen, H. Jussila, J. Rönn, M. Ruoho, T. Alasaarela, S. Kujala, R. A. Norwood, N. Peyghambarian, K. Kieu, and S. Honkanen, “Enhancement of the third-order optical nonlinearity in ZnO/Al₂O₃ nanolaminates fabricated by atomic layer deposition." Appl. Phys. Lett. 103, 031903.

• P. Sievilä, J. Mäkinen, M. Tilli, and I. Tittonen, “Dopant-induced stress in microfabricated silicon devices." J. Appl. Phys. 114, 043512.

• M. Erdmanis, L. Karvonen, A. Säynätjoki, X. Tu, T. Y. Liow, Q. G. Lo, O. Vänskä, S. Honkanen, and I. Tittonen, “Towards broad-bandwidth polarization-independent nanostrip waveguide ring resonators." Optics Express 21, 9974.

• Z. Liu, K. Iltanen, N. Chekurov, K. Grigoras, and I. Tittonen. "Aluminum oxide mask fabrication by focused ion beam implantation combined with wet etching." Nanotechnology 24, 175304.

• O. Vänskä, M. Kira, S.W. Koch, and I. Tittonen. "Analytical solutions for electronic states in three-dimensional semiconductor quantum rings." Phys. Status Solidi C 10, 1246.

• V. Pale, T. Nikkonen, J. Vapaavuori, M. Kostiainen, J. Kavakka, J. Selin, I. Tittonen, and J. Helaja."Biomimetic zinc chlorin – poly(4-vinylpyridine) assemblies: doping level dependent emission-absorption regimes." J. Mater. Chem. C 1, 2166.

• T. Lindvall, T. Fordell, I. Tittonen, and M. Merimaa. "Unpolarized, incoherent repumping light for prevention of dark states in a trapped and laser-cooled single ion." Phys. Rev. A 87, 013439

• P. Sievilä, N. Chekurov, J. Raittila, and I. Tittonen. "Sensitivity-improved silicon cantilever microphone for acousto-optical detection." Sensor. Actuat. A. 190, 90.

• K. Chalapat, N. Chekurov, H. Jiang, J. Li, B. Parviz, and G. S Paraoanu. "Self-Organized Origami Structures via Ion-Induced Plastic Strain." Adv. Mater. 25, 91.

2012

• T. Lindvall, M. Merimaa, I. Tittonen, and A. A. Madej. "Dark-state suppression and optimization of laser cooling and fluorescence in a trapped alkaline-earth-metal single ion." Phys. Rev. A 86, 033403.

• M.Erdmanis, A. Tervonen, S. Honkanen, L. Karvonen, R. Saleem, M. Ruoho, V. Pale, and I. Tittonen. "ALD-assisted multi-order dispersion engineering of nanophotonic strip waveguides." J. Lightwave Technol. 30, 2488.

2011

• O. Vänskä, M. Kira, I. Tittonen, and S. W. Koch. "Indirect interband optical transitions in a semiconductor quantum ring with submicrometer dimensions." Phys. Rev. B 84, 165317.

• O. Toikkanen, N. Doan, M. Erdmanis, H. Lipsanen, K. Kontturi, and B. Parviz. "Building Molecular Surface Gradients with Electron Beam Lithography." J. Micromech. Microeng. 21, 054025.

2010

• P. Sievila, N. Chekurov and I. Tittonen. "The fabrication of silicon nanostructures by focused-ion-beam implantation and TMAH wet etching." Nanotechnology 21, 145301.

• N. Chekurov, K. Grigoras, L. Sainiemi, A. Peltonen, I. Tittonen, and S. Franssila. "Dry fabrication of microdevices by the combination of focused ion beam and cryogenic deep reactive ion etching." J. Micromech. Microeng. 20, 085009.

• J. P. Pekola, V. F. Maisi, S. Kafanov, N. Chekurov, A. Kemppinen, Yu. A. Pashkin, O.-P. Saira, M. Möttönen, and J. S. Tsai. "Environment-Assisted Tunneling as an Origin of the Dynes Density of States." Phys. Rev. Lett. 105, 026803.

2009

• T. Lindvall and I. Tittonen. “Interaction-time-averaged optical pumping in alkali-metal-atom Doppler spectroscopy.” Phys. Rev. A 80, 032505.

• O. Hahtela, A. Satrapinski, P. Sievilä, and N. Chekurov. "Atomic Layer Deposited Alumina(Al₂O₃) Coating on Thin Film Cryoresistors." IEEE Transactions on Instrumentation & Measurement 58, 1051685510516855.

• O. Kimmelma, I. Tittonen. "Passively Q-switched Nd:YAG pumped UV lasers at 280 and 374 nm." Optics Communications 282.

• N. Chekurov, K. Grigoras, A. Peltonen, S. Franssila, and I. Tittonen. "The fabrication of silicon nanostructures by local gallium implantation and cryogenic deep reactive ion etching." Nanotechnology 20, 065307.

2008

• O. Kimmelma, I. Tittonen, and S. C. Buchter. "Short pulse, diode pumped, passively Q-switched Nd:YAG laser at 946 nm quadrupled for UV production." Journal of European Optics Society: Rapid Publications 3, 08008.

• O. Kimmelma, I. Tittonen, and S.C. Buchter. "Thermal tuning of laser pulse parameters in passively Q-switched Nd:YAG lasers." Applied Optics 47.

• E. Räikkönen, O. Kimmelma, M. Kaivola, and S.C. Buchter. "Passively Q-switched Nd:YAG/KTA laser at 561 nm." Optics Communications 281 .

• V. Välimäki, S. Gonzáles, O. Kimmelma, and J. Parviainen. "Digital Audio Antiquing - Signal Processing Methods for Imitating the Sound Quality of Historical Recordings." JAES 56, pp.115-139.

• M. Koskenvuori and I. Tittonen. "Towards micromechanical radio: Overtone excitations through the non-linearities of 2nd and 3rd order." Journal of Microelectromechanical Systems 17, 99210169921016.

• M. Koskenvuori and I. Tittonen. "GHz-range FSK-reception with microelectromechanical resonators." Sens. Act. A 142/1, 346.

2007

• O. Hahtela and I. Tittonen. "Non-tilting out-of-plane mode high-Q mechanical silicon oscillator as a moving cavity mirror." Appl. Phys. B 88, 417.

• M. Koskenvuori and I. Tittonen. "Parametric amplification of a resonating multimode micromechanical mixer-filter." IEEE Electron Dev. Lett. 28, 970.

• N. Chekurov, M. Koskenvuori, V-M. Airaksinen, and I. Tittonen. "Atomic layer deposition enhanced rapid dry fabrication of micromechanical devices with cryogenic deep reactive ion etching." J. Micromech. Microeng. 17 pp. 1731-1736.

• M. Koskenvuori, V-P. Rytkönen, P. Rantakari, and I. Tittonen. "Method for a fast measurement of built-in voltage inside closed cavity MEMS-devices." J. Phys. D: Appl. Phys. 40 pp. 5558-5563.

• P. Sievilä, V-P. Rytkönen, O. Hahtela, N. Chekurov, J. Kauppinen, and I. Tittonen. "Fabrication and characterization of an ultrasensitive acousto-optical cantilever for pressure sensing." J. Micromech. Microeng. 17 pp. 852-859.

• T. Lindvall and I. Tittonen. "Effect of optical pumping on alkali-atom Doppler-limited spectra." J. Mod. Opt. 54 pp. 2779-2793.

• O. Kimmelma, M. Kaivola, I. Tittonen and S. C. Buchter. "Short pulse, high peak power, diode pumped, passively Q-switched 946 nm Nd:YAG laser." Optics Communications 273 pp. 496-499.

• O. Hahtela, P. Sievilä, N. Chekurov, and I. Tittonen. "Atomic layer deposited alumina (Al₂O₃) thin films on a high-Q mechanical silicon oscillator." J. Micromech. Microeng. 17 pp. 737-742.

2006

• E. Räikkönen, G. Genty, O. Kimmelma, M. Kaivola, K. P. Hansen, and S. C. Buchter. "Supercontinuum generation by nanosecond dual-wavelength pumping in microstructured optical fibers." Optics Express 14, pp. 7914-7923.

• A. Shevchenko, M. Heiliö, T. Lindvall, A. Jaakkola, I. Tittonen, M. Kaivola, and T. Pfau. "Trapping atoms on a transparent permanent-magnet atom chip." Phys. Rev. A 73, 051401(R).

Theses

Doctoral Theses

• Ville Pale. Molecular materials for photonics (2017).

• Mikko Ruoho. Nanostructured thin films for thermoelectric and sensing applications (2016).

• Osmo Vänskä. Theoretical studies of optical transitions in semiconductor quantum structures (2015).

• Mikhail Erdmanis. Modern fabrication techniques for nanostructures and photonic components (2014).

• Päivi Sievilä. Microfabrication technologies for single-crystal silicon sensors (2013).

• Anna Rissanen. Microsystems for biological cell characterization (2012).

• Nikolai Chekurov. Fabrication process development for silicon micro and nanosystems (2011).

• Thomas Lindvall. Alkali-metal atoms in laser fields: Optical pumping, coherent population trapping, and laser cooling (2010).

• Ossi Kimmelma. Passively Q-switched Nd:YAG lasers and their use in UV light generation (2009).

• Mika Koskenvuori. Microelectromechanical resonators for frequency reference and requency conversion applications (2008).

• Ossi Hahtela. High-Q mechanical silicon oscillators in optomechanical sensor applications (2007).

• Anu Kärkkäinen. MEMS based voltage references (2006).

Licenciate Theses

• Kari Iltanen. Couple MEMS resonator networks (2017).

• Ossi Kimmelma. Novel light sources based on nonlinear frequency conversion of diode pumped quasi-three-level Nd lasers (2005).

• Ossi Hahtela. Optical actuation of a micromechanical oscillator (2004).

Master's Theses

• Julius Nieminen. Angle-dependent luminescence from a semiconductor quantum ring (2016).

• Jorma Selin. Fluorescence enhancement with large-scale nanoparticle arrays (2015).

• Taneli Juntunen. Quantum transport and terahertz photoconductivity in a mesoscopic carbon nanotube film (2015).

• Ville Kivijärvi. Numerical optimization of grating coupling efficiency to nanophotonic waveguides (2014).

• Mikko Ruoho. Nanostructured thermoelectric materials (2012).

• Ville Pale. Improving the optical properties of chlorophyll aggregates with supramolecular design (2011).

• Mikko Saarinen. Cantilever enhanced gas sensing using photoacoustic spectroscopy (2010).

• Kari Iltanen. Kohdistetun ionisuihkun ja kryogeenisen reaktiivisen ionisyväetsauksen yhdistelmäprosessin karakterisointi (2009).

• Nikolai Chekurov. Prebreakdown processes in capacitive microsystems (2005).

• Päivi Sievilä. Physics of surface plasmon resonance (2005).

• Ossi Kimmelma. Laser frequency doubling using a periadically poled nonlinear crystal (2002).

• Mika Koskenvuori. Mekaanisen resonaattorin toteuttaminen MHz-alueelle SOI-teknologialla (2002).

• Ossi Hahtela. Optical interferometry on a mechanical silicon oscillator  (2001).

• Thomas Lindvall. All-optical 3-GHz frequency standard based on rubidium transitions  (2000).