Kirjasto - Tampereen teknillinen yliopisto

Browsing by Author "Turunen, Jari"

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  • Chiral coupling in gold nanodimers 
    Husu, Hannu; Canfield, Brian K.; Laukkanen, Janne; Bai, Benfeng; Kuittinen, Markku; Turunen, Jari; Kauranen, Martti (2008)
    Second-harmonic generation from T-shaped gold nanodimers with nanogaps has different efficiencies for left- and right-hand circularly polarized fundamental light. The difference arises from the chiral symmetry breaking of ...
  • Chirality arising from small defects in gold nanoparticle arrays 
    Canfield, Brian K.; Kujala, Sami; Laiho, Kaisa; Jefimovs, Konstantins; Turunen, Jari; Kauranen, Martti (2006)
    The symmetry of metal nanostructures may be broken by their overall features or small-scale defects. To separate the roles of these two mechanisms in chiral symmetry breaking, we prepare gold nanostructures with chirality ...
  • Dispatcher workstation data communication in Nokia TETRA System 
    Turunen, Jari (1997-06-04)
    Nokia TETRA System is a new cellular network developed by the Professional Mobile Radio business unit of Nokia Telecommunications. The system is based on the recent, fully digital TETRA standard and it is specifically meant ...
  • Giant optical activity in quasi-two-dimensional planar nanostructures 
    Kuwata-Gonokami, Makoto; Saito, Nobuyoshi; Ino, Yusuke; Kauranen, Martti; Jefimovs, Konstantins; Vallius, Tuomas; Turunen, Jari; Svirko, Yuri (2005)
    We examine the spectral dependence in the visible frequency range of the polarization rotation of two-dimensional gratings consisting of chiral gold nanostructures with subwavelength features. The gratings, which do not ...
  • Linear and nonlinear optical responses influenced by broken symmetry in an array of gold nanoparticles 
    Canfield, Brian K.; Kujala, Sami; Jefimovs, Konstantins; Turunen, Jari; Kauranen, Martti (2004)
    An array of low-symmetry, L-shaped gold nanoparticles is shown to exhibit high sensitivity to the state of incident polarization. Small imperfections in the shape of the actual particles, including asymmetric arm lengths ...
  • Multipolar analysis of second-harmonic radiation from gold nanoparticles 
    Kujala, Sami; Canfield, Brian K.; Kauranen, Martti; Svirko, Yuri; Turunen, Jari (2008)
    We present a multipolar tensor analysis of second-harmonic radiation from arrays of noncentrosymmetric L-shaped gold nanoparticles. Our approach is based on the fundamental differences in the radiative properties of electric ...
  • Multipole interference in the second-harmonic optical radiation from gold nanoparticles 
    Kujala, Sami; Canfield, Brian K.; Kauranen, Martti; Svirko, Yuri; Turunen, Jari (2007)
    We provide experimental evidence of higher multipole (magnetic dipole and electric quadrupole) radiation in second-harmonic (SH) generation from arrays of metal nanoparticles. Fundamental differences in the radiative ...
  • Optical activity in diffraction from a planar array of achiral nanoparticles 
    Volkov, S.N.; Dolgaleva, Ksenia; Boyd, Robert W.; Jefimovs, Konstantins; Turunen, Jari; Svirko, Yuri; Canfield, Brian K.; Kauranen, Martti (2009)
    We prepare diffractive planar arrays of metal nanoparticles that are chiral because of either the shape of individual particles (“molecular” chirality) or the orientation of achiral particles in the array (“structural” ...
  • Remarkable polarization sensitivity of gold nanoparticle arrays 
    Canfield, Brian K.; Kujala, Sami; Kauranen, Martti; Jefimovs, Konstantins; Vallius, Tuomas; Turunen, Jari (2005)
    In an array of low-symmetry, L-shaped gold nanoparticles, slight distortions of particle shape and arm lengths eliminate the array’s mirror plane. Such asymmetries induce large angular shifts ( ∼ 10°) of the resonant ...