tailieunhanh - Báo cáo hóa học: " Laser-Induced, Polarization Dependent Shape Transformation of Au/Ag Nanoparticles in Glass"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Laser-Induced, Polarization Dependent Shape Transformation of Au/Ag Nanoparticles in Glass | Nanoscale Res Lett 2009 4 1380-1383 DOI s11671-009-9408-5 NANO EXPRESS Laser-Induced Polarization Dependent Shape Transformation of Au Ag Nanoparticles in Glass G. Seifert A. Stalmashonak H. Hofmeister J. Haug M. Dubiel Received 13 May 2009 Accepted 29 July 2009 Published online 11 August 2009 to the authors 2009 Abstract Bimetallic initially spherical Ag Au nanoparticles in glass prepared by ion implantation have been irradiated with intense femtosecond laser pulses at intensities still below the damage threshold of the material surface. This high-intensity laser processing produces dichroism in the irradiated region which can be assigned to the observed anisotropic nanoparticle shapes with preferential orientation of the longer particle axis along the direction of laser polarization. In addition the particle sizes have considerably been increased upon processing. Keywords Alloy nanoparticles Glass Laser irradiation Femtosecond laser processing Dichroism Nano-sized metal particles embedded in glass are of great interest because of their potential application as non-linear material for photonic devices 1 2 . The non-linear properties of nanocomposite glasses equipped with such particles are induced by the surface plasmon resonance at the interface between particles and glass matrix. This means that the optical effects in the spectral region around the surface plasmon resonance result from an electric field G. Seifert El A. Stalmashonak Institut fur Physik Fachgruppe Optik Martin-Luther-Universitat Halle-Wittenberg Hoher Weg 8 06120 Halle Germany e-mail H. Hofmeister Max-Planck-Institut fur Mikrostrukturphysik Weinberg 2 06120 Halle Germany J. Haug M. Dubiel Institut fur Physik Fachgruppe ANM Martin-Luther-Universitat Halle-Wittenberg Friedemann-Bach-Platz 6 06099 Halle Germany 0 Springer enhancement or a quantum confinement. Thus applications are possible as in integrated photonic networks in nanoelectronics for surface .