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Bragg reflection of terahertz waves in plasmonic crystals
Lee, Eui Su,Kang, D. H.,Fernandez-Dominguez, A. I.,Garcia-Vidal, F. J.,Martin-Moreno, L.,Kim, D. S.,Jeon, Tae-In The Optical Society 2009 Optics express Vol.17 No.11
<P>We present experimental and theoretical studies on terahertz surface plasmon (TSP) propagation on slit and rectangular aperture arrays in an aluminum sheet. Terahertz waves are coupled onto the plasmonic structures via a parallel plate waveguide. Long-lasting oscillations are observed in the temporal pulse shape after propagating through the periodic structure, whose Fourier transformation into the frequency domain results in Bragg-resonance spectral features. We show that the interference between the incident wave and the radiation reflected from both the aperture array and the waveguide block is responsible for this Bragg-resonance behavior. The reflection coefficient for a single slit is deduced to be 0.017 +/- 0.002.</P>
Surgical Management of an Infected Popliteal Artery Aneurysm
Juan Carlos Moy Petersen,Ignacio Hernández-Lahoz Ortiz,Delfin Couto Mallón,Juan José Vidal Insua,Jose Raul Garcia Casas 대한혈관외과학회 2014 Vascular Specialist International Vol.30 No.3
Infective aneurysms are rare due to the antimicrobial advances and the early treatment of systemic infections. They represent a diagnostic and therapeutic challenge. The treatment for these cases is generally characterised by excision and reconstruction using an autologous vein graft. We describe a case of a 66-year-old man who presented an 8 cm infected popliteal aneurysm where urgent surgical approach was performed. The vascular continuity was restored with a basilic vein. Clinical follow-up showed no signs of recurrent infection and patent bypass without any anastomotic pseudoaneurysm after a year.