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Kirjasto - Tampereen teknillinen yliopisto

Browsing Research publications by Department "Optoelektroniikan tutkimuskeskus – Optoelectronics Research Centre"

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  • Ning, Tingyin; Pietarinen, Henna; Hyvärinen, Outi; Kumar, Ravi; Kaplas, Tommi; Kauranen, Martti; Genty, Goery (2012-10)
    We demonstrate a thousand-fold enhancement of second-harmonic generation in an all-dielectric silicon nitride (SiN) resonant waveguide grating compared to a flat SiN film. The strong second-harmonic output measured at 532 ...
  • Guina, Mircea; Leinonen, Tomi; Härkönen, Antti; Pessa, Markus (2009)
    We report the development of InGaAsN-based gain mirrors for high-power optically pumped semiconductor disk lasers with direct emission at wavelengths around 1180 nm. The gain mirrors were fabricated by molecular beam ...
  • H'Dhili, Fekhra; Okamoto, Takayuki; Simonen, Janne; Kawata, Satoshi (2011-01-15)
    We report on a two dimensional plasmonic structure that utilizes an Ag film for the generation of surface plasmons and a layer of the organic semiconductor tri(8-hydroxyquinoline) aluminum (Alq3) doped with the laser dye ...
  • Canfield, Brian K.; Husu, Hannu; Kontio, Juha; Viheriälä, Jukka; Rytkönen, Tuomo; Niemi, Tapio; Chandler, Eric; Hrin, Alex; Squier, Jeff A.; Kauranen, Martti (2008)
    We use second- and third-harmonic-generation microscopy to address the tensorial nonlinear responses of individual particles in an array of cylindrical gold nanodots. The responses in both orders exhibit widely-variable, ...
  • Rautiainen, Jussi; Krestnikov, I.; Nikkinen, Jari; Okhotnikov, Oleg G. (2011)
    We demonstrate a frequency doubled dual-gain quantum dot semiconductor disk laser operating at 590 nm. The reflective gain element, grown by molecular beam epitaxy, has active region composed of 39 layers of InGaAs Stranski- ...
  • Kontio, J.; Husu, H.; Simonen, J.; Huttunen, M.; Tommila, J.; Pessa, M.; Kauranen, M. (2009)
    We show that nanoimprint lithography combined with electron-beam evaporation provides a cost-efficient, rapid, and reproducible method to fabricate conical nanostructures with very sharp tips on flat surfaces in high ...
  • Ning, Tingyin; Pietarinen, Henna; Hyvärinen, Outi; Simonen, Janne; Genty, Goery; Kauranen, Martti (2012)
    We observe strong second-harmonic generation from silicon nitride films prepared on fused silica substrates by plasma enhanced chemical vapor deposition. The components of the second-order nonlinear optical susceptibility ...
  • Wang, Fu Xiang; Rodriguez, Francisco J.; Albers, Willem M.; Ahorinta, Risto; Sipe, J.E.; Kauranen, Martti (2009)
    We use two-beam second-harmonic generation to separate the surface (electric dipole origin) and bulk (magnetic dipole and electric quadrupole origin) contributions to the second-order nonlinear optical response of an ...
  • Rao, Satish; Huttunen, Mikko J.; Kontio, Juha M.; Mäkitalo, Jouni; Viljanen, Milla-Riina; Simonen, Janne; Kauranen, Martti; Petrov, Dmitri (2010)
    We present two silver nanocones separated by 450 nm, well beyond the typical gap spacing of coupled nanoantennas, and connected by a metal bridge to facilitate plasmonic coupling between them. The tip-enhanced Raman ...
  • Okhotnikov, Oleg; Grudinin, Anatoly; Pessa, Markus (2004)
    A promising route to manufacturing portable (sub-)picosecond fibre lasers is to use a semiconductor saturable absorber mirror (SESAM). With SESAMs, the mode-locked regime can be achieved for different values of cavity ...