Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 42: Plasmonics IV (joint session O/CPP)

CPP 42.5: 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)