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HL: Fachverband Halbleiterphysik

HL 39: Optical properties

HL 39.8: Talk

Tuesday, March 12, 2013, 12:15–12:30, H13

Photoconductance properties of gold nanorod arrays — •Sandra Diefenbach¹, Daniela Iacopino², Johannes Schopka¹, and Alexander Holleitner¹ — ¹Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching b. München, Germany — ²Tyndall National Institute, Lee Maltings, University of Cork, Ireland

Gold nanorods are fabricated by dielectrophoretic self-assembly [1] and contacted by gold contacts. Conductance measurements in the dark confirm thermally activated transport at room temperature. At low temperature, a dominating Coulomb blockade is observed [2]. The photoconductance of the nanorod arrays depends linearly on laser power and exponentially on temperature. The photoconductance experiments allow us to clarify the impact of the longitudinal plasmon frequency of the nanorods on the optoelectronic properties of the arrays. Financial support by the grant HYSENS is acknowledged.

[1] A. Pescaglini et al. J. of Phys. Conf. Ser., 307, 012051 (2011).

[2] M. Mangold, M. Calame, M. Mayor, A.W. Holleitner, ACS Nano 6, 4181 (2012).