Markku Sopanen Group

Organisational unit: Research group

Research outputs

  1. 2019
  2. Published

    Effects of indium flow rate on the structural, morphological, optical and electrical properties of InGaN layers grown by metal organic chemical vapour deposition

    Prabakaran, K., Raju, R., Arivazhagan, P., Jayasakthi, M., Sanjay, S., Surender, S., Pradeep, S., Balaji, M. & Baskar, K., 30 Nov 2019, In : Journal of Alloys and Compounds. 811, 151803.

    Research output: Contribution to journalArticleScientificpeer-review

  3. Published

    Selective terahertz emission due to electrically excited 2D plasmons in AlGaN/GaN heterostructure

    Shalygin, V. A., Moldavskaya, M. D., Vinnichenko, M. Y., Maremyanin, K. V., Artemyev, A. A., Panevin, V. Y., Vorobjev, L. E., Firsov, D. A., Korotyeyev, V. V., Sakharov, A. V. & 6 others, Zavarin, E. E., Arteev, D. S., Lundin, W. V., Tsatsulnikov, A. F., Suihkonen, S. & Kauppinen, C., 14 Nov 2019, In : Journal of Applied Physics. 126, 18, 183104.

    Research output: Contribution to journalArticleScientificpeer-review

  4. E-pub ahead of print

    Metalorganic chemical vapor deposition of aluminum nitride on vertical surfaces

    Österlund, E., Suihkonen, S., Ross, G., Torkkeli, A., Kuisma, H. & Paulasto-Kröckel, M., 11 Nov 2019, In : Journal of Crystal Growth. 531, 125345.

    Research output: Contribution to journalArticleScientificpeer-review

  5. Published

    Terahertz Emission due to Radiative Decay of Hot 2D Plasmons in AlGaN/GaN Heterojunction

    Shalygin, V. A., Moldavskaya, M. D., Vinnichenko, M. Y., Panevin, V. Y., Maremyanin, K. V., Firsov, D. A., Vorobjev, L. E., Sakharov, A. V., Zavarin, E. E., Arteev, D. S. & 4 others, Lundin, W. V., Korotyeyev, V. V., Suihkonen, S. & Kauppinen, C., 1 Sep 2019, IRMMW-THz 2019 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves. IEEE, 8873862. (International Conference on Infrared, Millimeter, and Terahertz Waves).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  6. Published

    Epi-Gd2O3/AlGaN/GaN MOS HEMT on 150 mm Si wafer: A fully epitaxial system for high power application

    Sarkar, R., Bhunia, S., Nag, D., Barik, B. C., Das Gupta, K., Saha, D., Ganguly, S., Laha, A., Lemettinen, J., Kauppinen, C. & 4 others, Kim, I., Suihkonen, S., Gribisch, P. & Osten, H. J., 5 Aug 2019, In : Applied Physics Letters. 115, 6, 063502.

    Research output: Contribution to journalArticleScientificpeer-review

  7. Published

    Nitrogen-polar polarization-doped field-effect transistor based on Al0.8Ga0.2N/AlN on SiC with drain current over 100 mA/mm

    Lemettinen, J., Chowdhury, N., Okumura, H., Kim, I., Suihkonen, S. & Palacios, T., 1 Aug 2019, In : IEEE Electron Device Letters. 40, 8, p. 1245-1248 4 p., 8741077.

    Research output: Contribution to journalArticleScientificpeer-review

  8. Published

    In-situ annealing characterization of atomic-layer-deposited Al2O3 in N2 , H2 and vacuum atmospheres

    Broas, M., Lemettinen, J., Sajavaara, T., Tilli, M., Vuorinen, V., Suihkonen, S. & Paulasto-Kröckel, M., 31 Jul 2019, In : Thin Solid Films. 682, p. 147-155 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  9. Published

    P-Channel GaN transistor based on p-GaN/AlGaN/GaN on Si

    Chowdhury, N., Lemettinen, J., Xie, Q., Zhang, Y., Rajput, N. S., Xiang, P., Cheng, K., Suihkonen, S., Then, H. W. & Palacios, T., 1 Jul 2019, In : IEEE Electron Device Letters. 40, 7, p. 1036-1039 4 p., 8713471.

    Research output: Contribution to journalArticleScientificpeer-review

  10. Published

    Structural, morphological, optical and electrical characterization of InGaN/GaN MQW structures for optoelectronic applications

    Prabakaran, K., Jayasakthi, M., Surender, S., Pradeep, S., Sanjay, S., Ramesh, R., Balaji, M., Gautier, N. & Baskar, K., 15 May 2019, In : Applied Surface Science. 476, p. 993-999 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  11. Published

    Influence of InGaN interlayer thickness on GaN layers grown by metal organic chemical vapour deposition

    Prabakaran, K., Jayasakthi, M., Surender, S., Pradeep, S., Sanjay, S., Ramesh, R., Balaji, M. & Baskar, K., 1 Mar 2019, In : APPLIED PHYSICS A-MATERIALS SCIENCE AND PROCESSING. 125, 3, 7 p., 206.

    Research output: Contribution to journalArticleScientificpeer-review

  12. Published

    Aluminum Nitride Transition Layer for Power Electronics Applications Grown by Plasma-Enhanced Atomic Layer Deposition

    Seppänen, H., Kim, I., Etula, J., Ubyivovk, E., Buravlev, A. & Lipsanen, H., 28 Jan 2019, In : Materials. 12, 3, 8 p., 406.

    Research output: Contribution to journalArticleScientificpeer-review

  13. Published

    Point defects induced work function modulation of β-Ga2O3

    Tak, B. R., Dewan, S., Goyal, A., Pathak, R., Gupta, V., Kapoor, A. K., Nagarajan, S. & Singh, R., 28 Jan 2019, In : Applied Surface Science. 465, p. 973-978 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  14. Published

    Site-specific growth of oriented ZnO nanocrystal arrays

    Bai, R., Pandya, D., Chaudhary, S., Dhaka, V., Khayrudinov, V., Lemettinen, J., Kauppinen, C. & Lipsanen, H., 1 Jan 2019, In : Beilstein Journal of Nanotechnology. 9, 1, p. 274-280 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  15. 2018
  16. Published

    Investigations on morphology, growth mode and indium incorporation in MOCVD grown InGaN/n-GaN heterostructures

    Prabakaran, K., Jayasakthi, M., Surender, S., Pradeep, S., Sanjay, S., Ramesh, R., Balaji, M. & Baskar, K., 1 Dec 2018, In : Optik. 175, p. 154-162 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  17. Published

    N-polar AlN buffer growth by metal-organic vapor phase epitaxy for transistor applications

    Lemettinen, J., Okumura, H., Palacios, T. & Suihkonen, S., Oct 2018, In : APPLIED PHYSICS EXPRESS. 11, 10, 4 p., 101002.

    Research output: Contribution to journalArticleScientificpeer-review

  18. Published

    Nonlinear plasmonic behavior of nanohole arrays in thin gold films for imaging lipids

    Subramaniyam, N., Shah, A., Dreser, C., Isomäki, A., Fleischer, M. & Sopanen, M., 4 Jun 2018, In : Applied Physics Letters. 112, 23, 5 p., 233109.

    Research output: Contribution to journalArticleScientificpeer-review

  19. Published

    Surface-core fibers: Plasmonics and sensing

    Osório, J. H., Matikainen, A., Ludvigsen, H. & Cordeiro, C. M. B., 1 Jan 2018, Latin America Optics and Photonics Conference, LAOP 2018. Vol. Part F123-LAOP 2018.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  20. Published

    Scalable nanofabrication techniques for III-V compound semiconductors and dielectrics

    Kauppinen, C., 2018, Aalto University. 161 p.

    Research output: ThesisDoctoral ThesisCollection of Articles

  21. 2017
  22. Published

    Atomic layer etching of gallium nitride (0001)

    Kauppinen, C., Khan, S. A., Sundqvist, J., Suyatin, D. B., Suihkonen, S., Kauppinen, E. I. & Sopanen, M., 1 Nov 2017, In : JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY A. 35, 6, p. 1-5 5 p., 060603.

    Research output: Contribution to journalArticleScientificpeer-review

  23. Published
  24. 2016
  25. Published

    Non-destructive method for strain imaging in an individual GaN nanorod by confocal Raman technique

    Nagarajan, S. & Sopanen, M., 26 Oct 2016, In : Journal of Physics D: Applied Physics. 49, 46, 6 p., 465303.

    Research output: Contribution to journalArticleScientificpeer-review

  26. Published

    A technique for large-area position-controlled growth of GaAs nanowire arrays

    Kauppinen, C., Haggren, T., Kravchenko, A., Jiang, H., Huhtio, T., Kauppinen, E., Dhaka, V., Suihkonen, S., Kaivola, M., Lipsanen, H. & 1 others, Sopanen, M., 22 Feb 2016, In : Nanotechnology. 27, 13, 6 p., 135601.

    Research output: Contribution to journalArticleScientificpeer-review

  27. Published

    Investigation of significantly high barrier height in Cu/GaN Schottky diode

    Garg, M., Kumar, A., S., N., Sopanen, M. & Singh, R., 1 Jan 2016, In : AIP ADVANCES. 6, 1, p. 1-7 7 p., 015206.

    Research output: Contribution to journalArticleScientificpeer-review

  28. Published

    Fluorescence-enhancing plasmonic silver nanostructures using azopolymer lithography

    Pale, V., Kauppinen, C., Selin, J., Sopanen, M. & Tittonen, I., 2016, In : RSC Advances. 6, 53, p. 48129-48136 8 p., 6.

    Research output: Contribution to journalArticleScientificpeer-review

  29. Published

    Study Of 1/f Noise Characteristics In Cu/n-GaN Schottky Barrier Diode

    Garg, M., Kumar, A., Subramaniyam, N., Sopanen, M. & Singh, R., 2016, DAE SOLID STATE PHYSICS SYMPOSIUM 2015. Chitra, R., Bhattacharya, S. & Sahoo, NK. (eds.). 3 p. (AIP Conference Proceedings; vol. 1731).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  30. 2015
  31. Published

    Temperature dependent 1/f noise characteristics of the Fe/GaN ferromagnetic Schottky barrier diode

    Kumar, A., Subramaniyam, N., Sopanen, M., Kumar, V. & Singh, R., 7 Sep 2015, In : Semiconductor Science and Technology. 30, 10, 7 p., 105022.

    Research output: Contribution to journalArticleScientificpeer-review

  32. Published

    Characterization of surface acoustic waves by stroboscopic white-light interferometry

    Kokkonen, K., Lipiäinen, L., Shavrin, I., Novotny, S., Kaivola, M. & Ludvigsen, H., 2015, In : Optics Express. 23, 8, p. 9690-9695 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  33. Published

    Foreword to the Special Issue on European Conference on Optical Communications (ECOC 2014)

    Bigo, S., Nouchi, P., Ludvigsen, H., Lerminiaux, C., Ellis, A., Raz, O., Frignac, Y., Hamaide, J-P. & Chanclou, P., 2015, In : Journal of Lightwave Technology. 33, 5, p. 959-963

    Research output: Contribution to journalArticleScientific

  34. Published

    Picosecond supercontinuum generation: Numerical and experimental analysis

    Durairaj, V., Bravo Gonzalo, I., Novotny, S. & Ludvigsen, H., 2015, Northern Optics and Photonics (NOP 2015), 2-4 June 2015, Lappeenranta, Finland. Lappeenranta

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  35. Published

    Two-Photon Absorption in GaAs1-x-yPyNx Intermediate-Band Solar Cells

    Jussila, H., Kivisaari, P., Lemettinen, J., Tanaka, T. & Sopanen, M., 2015, In : Physical Review Applied. 3, 5, p. 1-9 054007.

    Research output: Contribution to journalArticleScientificpeer-review

  36. 2014
  37. Published

    Properties of atomic-layer-deposited ultra-thin AlN films on GaAs surfaces

    Mattila, P., Bosund, M., Jussila, H., Aierken, A., Riikonen, J., Huhtio, T., Lipsanen, H. & Sopanen, M., 30 Sep 2014, In : Applied Surface Science. 314, p. 570-574 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  38. Published

    Composition determination of quaternary GaAsPN layers from single X-ray diffraction measurement of quasi-forbidden (002) reflection

    Tilli, J-M., Jussila, H., Yu, K. M., Huhtio, T. & Sopanen, M., 22 May 2014, In : Journal of Applied Physics. 115, 20, 8 p., 203102.

    Research output: Contribution to journalArticleScientificpeer-review

  39. Published

    Diffusion injected multi-quantum well light-emitting diode structure

    Riuttanen, L., Kivisaari, P., Nykänen, H., Svensk, O., Suihkonen, S., Oksanen, J., Tulkki, J. & Sopanen, M., 2014, In : Applied Physics Letters. 104

    Research output: Contribution to journalArticleScientificpeer-review

  40. Published

    Full-field characterization of surface vibrations in microacoustic components by supercontinuum laser stroboscopic white-light interferometry

    Lipiäinen, L., Kokkonen, K., Novotny, S., Shavrin, I., Ludvigsen, H. & Kaivola, M., 2014, 2014 IEEE International Ultrasonics Symposium. IEEE, p. 158-161 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  41. Published

    Growth and characterisation of InGaN/GaN multi-quantum wells on etched c- and a-plane GaN nanopillars

    Subramaniyam, N., Svensk, O., Amit, P., Shah, A., Rahman, A., Maliakkal, C. B., Bhattacharya, A., Lipsanen, H. & Sopanen, M., 2014, 17th International Conference on Metalorganic Vapor Phase Epitaxy, Lausanne, Switzerland, July 13-18, 2014. Switzerland

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  42. Published

    Growth and characterization of III-nitride nanostructures

    Subramaniyam, N. & Sopanen, M., 2014, Nanotechnology seminar IIT Delhi Saha Institute of Nuclear Physics, Kolkata, India, November 24-25 and November 27-28, 2014.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  43. Published
  44. Published

    Picosecond supercontinuum light source for stroboscopic white-light interferometry with freely adjustable pulse repetition rate

    Novotny, S., Durairaj, V., Shavrin, I., Lipiäinen, L., Kokkonen, K., Kaivola, M. & Ludvigsen, H., 2014, In : Optics Express. 22, 11, p. 13625-13633 9 p.

    Research output: Contribution to journalArticleScientificpeer-review

  45. Published

    Recent advances and applications of supercontinuum light

    Ludvigsen, H., 2014, 16th International Conference on Transparent Optical Networks (ICTON 2014), Graz, Austria, July 6-10, 2014. p. Paper Th.B1.1 (International Conference on Transparent Optical Networks-ICTON).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  46. Published

    Stress distribution in GaN nanopillars using confocal Raman mapping technique

    Subramaniyam, N., Svensk, O., Lehtola, L., Lipsanen, H. & Sopanen, M., 2014, In : Applied Physics Letters. 104, 15, p. 1-5 5 p., 151906.

    Research output: Contribution to journalArticleScientificpeer-review

  47. Published

    Substitutionality of nitrogen atoms and formation of nitrogen complexes and point defects in GaPN alloys

    Jussila, H., Yu, K. M., Kujala, J., Tuomisto, F., Subramaniyam, N., Lemettinen, J., Huhtio, T., Tuomi, T. O., Lipsanen, H. & Sopanen, M., 2014, In : Journal of Physics D: Applied Physics. 47, 7, p. 1-6 6 p., 075106.

    Research output: Contribution to journalArticleScientificpeer-review

  48. 2013
  49. Published

    Band-edge luminescence degradation by low energy electron beam irradiation in GaN grown by metal-organic vapor phase epitaxy in H2 and N 2 ambients

    Nykänen, H., Suihkonen, S., Svensk, O., Sopanen, M. & Tuomisto, F., Nov 2013, In : Japanese Journal of Applied Physics. 52, 11S, p. 1-3 3 p., 11NH04.

    Research output: Contribution to journalArticleScientificpeer-review

  50. Published

    Migration kinetics of ion-implanted beryllium in ZnO and GaN

    Koskelo, O., Köster, U., Tuomisto, F., Helariutta, K., Sopanen, M., Suihkonen, S., Svensk, O. & Räisänen, J., 22 Aug 2013, In : Physica Scripta. 88, 3, p. 1-5 5 p., 035603.

    Research output: Contribution to journalArticleScientificpeer-review

  51. Published

    Evaluation of critical thickness of GaP0.98N0.02 layer on GaP substrate by synchrotron X-ray diffraction topography

    Jussila, H., Subramaniyam, N., Sintonen, S., Suihkonen, S., Lankinen, A., Huhtio, T., Paulmann, C., Lipsanen, H., Tuomi, T. & Sopanen, M., 1 May 2013, In : Thin Solid Films. 534, p. 680-684 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  52. Published

    Fabrication of GaN Structures with Embedded Network of Voids Using Pillar Patterned GaN Templates

    Svensk, O., Ali, M., Riuttanen, L., Törmä, P., Sintonen, S., Suihkonen, S., Sopanen, M. & Lipsanen, H., 1 May 2013, In : Journal of Crystal Growth. 370, p. 42-45 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

  53. Published

    Thermally assisted recovery of low energy electron beam irradiation induced optical degradation of GaN

    Nykänen, H., Suihkonen, S., Sopanen, M. & Tuomisto, F., Mar 2013, In : PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS. 10, 3, p. 461-463 3 p.

    Research output: Contribution to journalArticleScientificpeer-review

  54. Published

    Analysis of dislocations generated during metal-organic vapor phase epitaxy of GaN on patterned templates

    Suihkonen, S., Ali, M., Törmä, P. T., Sintonen, S., Svensk, O., Sopanen, M., Lipsanen, H., Nevedomsky, V. N. & Bert, N. A., Jan 2013, In : Japanese Journal of Applied Physics. 52, 1S, p. 1-3 3 p., 01AF01.

    Research output: Contribution to journalArticleScientificpeer-review

  55. Published

    Enhanced light extraction from InGaN/GaN quantum wells with silver gratings

    Homeyer, E., Mattila, P., Oksanen, J., Sadi, T., Nykänen, H., Suihkonen, S., Symonds, C., Tulkki, J., Tuomisto, F., Sopanen, M. & 1 others, Bellessa, J., 2013, In : Applied Physics Letters. 102, 8, p. 1-4 4 p., 081110.

    Research output: Contribution to journalArticleScientificpeer-review

  56. Published

    Fiber-based true continuous-wave supercontinuum source

    Shavrin, I., Novotny, S., Savelyev, A. G., Buchter, S. C. & Ludvigsen, H., 2013, 47th annual conference of the Finnish Physical Society (Physics Days 2013), Espoo, Finland, March 14-16, 2013. Espoo

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  57. Published

    Mode excitation and supercontinuum generation in a few-mode suspended-core fiber

    Shavrin, I., Novotny, S. & Ludvigsen, H., 2013, In : Optics Express. 21, 26

    Research output: Contribution to journalArticleScientificpeer-review

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