Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 4: Semiconductor Lasers
HL 4.2: Vortrag
Montag, 5. September 2022, 09:45–10:00, H33
Temperature-dependent lasing operation of hybrid semiconductor nanowire - metal grating plasmonic nanolasers — •Francesco Vitale1, Daniel Repp2, Thomas Siefke2, Uwe Zeitner2, Thomas Pertsch2, and Carsten Ronning1 — 1Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena — 2Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Albert-Einstein-Straße 15, D-07745 Jena
Nanowire(NW)-based semiconductor-insulator-metal (SIM) plasmonic structures represent a benchmark platform for the next generation of hybrid nanolasers, capable of sustaining sub-wavelength hybrid lasing modes, which, in turn, lead to an overcoming of diffraction-limited mode footprints and an acceleration of the lasing dynamics, when compared to their photonic counterparts. In this work, we report on the realization and optical investigation of hybridized SIM platforms, in which single ZnO NWs are deterministically overlaid onto metal gratings (MGs), FIB-milled into a 70 nm Al layer with a nanometric Al2O3 spacer on top. By performing ns-excitation steady-state micro-PL, we study the spectral and temporal properties of such hybrid platforms, as a function of the cavity geometry (i.e. NW size, grating period and NW-trench orientation) and temperature. We report about room-temperature lasing in some of these hybrid NW-MG structures and lowering of the lasing threshold compared to the planar SIM plasmonic nanolasers.