Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 56: Plasmonics & Nanooptics IV: Materials Science and Chemistry Applications (joint session O/CPP)
O 56.5: Vortrag
Mittwoch, 3. April 2019, 16:00–16:15, H8
Dependence of graphene photoluminescence blinking on the local field enhancement — Markus Pfeiffer1, •Mo Lu1, Boris V. Senkovskiy2, Danny Haberer3, Felix R. Fischer3, Fan Yang2, Klaus Meerholz1, Yoichi Ando2, Alexander Grüneis2, and Klas Lindfors1 — 1Department of Chemistry, University of Cologne, Luxemburger Str. 116, D-50939, Köln, Germany — 2II. Physikalisches Institut, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany — 3Department of Chemistry, University of California at Berkeley, Tan Hall 680, Berkeley, CA 94720, USA
Armchair-edge graphene nanoribbons (AGNRs) are novel one-dimensional semiconductors with well-defined structure and promising optoelectronic properties. Their nanometer-sized dimensions and versatile electronic properties make them the ideal candidate for future optoelectronics. By coupling GNRs to plasmonic nanoantennas array, we obtain an enhancement of photoluminescence and Raman scattering intensity [1]. In the hotspots of the antennas, we observe the blinking of emission from AGNRs, which is a typical characteristic of a single quantum emitter [2]. Here we study the influence of the local field enhancement on the blinking process and find that the amplitude of the blinking events strongly correlates with the enhancement.
Reference:
[1] M. Pfeiffer, et al. 2D Materials, 5, 045006 (2018)
[2] M. Pfeiffer, et al. Nano Lett. 18, 7038-7044 (2018)