Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 21: Photonic Crystals I
HL 21.2: Vortrag
Montag, 26. März 2012, 17:15–17:30, EW 203
High frequency tuning of photonic crystal nanocavity modes using surface acoustic waves — •Daniel A. Fuhrmann1,2,3, Susanna M. Thon4, Hyochul Kim3, Dirk Bouwmeester4,5, Pierre M. Petroff3, Achim Wixforth1, and Hubert J. Krenner1,2 — 1Lehrstuhl für Experimentalphysik I, Universität Augsburg, Germany — 2Emmy Noether Group, Universität Augsburg, Germany — 3Materials Department, University of California, Santa Barbara, USA — 4Physics Department, University of California, Santa Barbara, USA — 5Huygens Laboratory, Leiden University, The Netherlands
We propose and demonstrate high frequency dynamic modulation of localized optical modes of photonic crystal membrane (PCM) defect nanocavities employing surface acoustic waves (SAWs). The mechanical deformation induced by SAW distorts the PCM periodicity and gives rise to pronounced modulation of the nanocavity mode. In time-integrated and SAW-phase resolved photoluminescence (PL) experiments we demonstrate tuning speeds > 1.7 GHz using this approach. In the experimental data we observe a pronounced sinusoidal shift of the cavity resonance over one cycle of the SAW. Shifts of more than 5 times the cavity linewidth are achieved. In addition, a high quality factor is preserved. These experimental observations are found in excellent agreement with FDTD simulations for the same cavity design and realistic SAW amplitudes. Our FDTD calculations show no resolvable shift of the field distribution of the cavity mode making our technique attractive for both real-time control of solid state cQED experiments and coherent mechanical excitation of cavity optomechanical systems.