Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 11: Plasmonics and Nanooptics II: Microscopy

O 11.6: Vortrag

Montag, 7. März 2016, 16:30–16:45, S054

Confocal active interference scattering microscopy: A new approach to characterize single gold nanoparticles — •Otto Hauler — Institute of Physical Chemistry — Tübingen — Germany

Gold nanoparticles and their applications have attracted considerable research interest in recent times. By using confocal interference microscopy in combination with cylindrical vector beams it is possible to directly image the orientation and to detect the shape of single metal nanoparticles, with sizes well beyond the diffraction limit [1-4]. We present a newly developed method to further investigate the properties of these promising materials, the confocal active interference scattering microscope. This novel technique allows the measurement of the phase of the elastically scattered light. It furthermore enables the control of the excitation polarization, through the use of radially- and azimuthally-polarized laser modes. [1] A.V. Failla, H. Qian, H. Qian, A. Hartschuh, A. J. Meixner, Nano Lett. (2006), 6: 1374. [2] F. Wackenhut, A.V. Failla, A.J. Meixner, Phys. Chem. Chem. Phys. (2013),15: 5407-5414. [3] F. Wackenhut, A.V. Failla, A.J. Meixner, Anal Bioanal Chem (2015), 407: 4029-4034. [4] F. Wackenhut, A.V. Failla, T. Züchner, M. Steiner, A.J. Meixner, Appl. Phys. Lett. (2012), 100: 263102.