Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 44: Optical Properties I
HL 44.7: Vortrag
Mittwoch, 9. März 2016, 11:45–12:00, H10
Coherent manipulation of photonic crystal microcavities with metallic electric contacts — •Wadim Quiring1, Björn Jonas1, Ashish Rai2, Dirk Reuter1, Andreas Dirk Wieck2, and Artur Zrenner1 — 1Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Paderborn, Germany — 2Ruhr-Universität Bochum, Bochum, Germany
We present our results of a two pulse experiment on a photonic crystal cavity (PhCC). We use MBE-grown GaAs membranes, which are designed as n-i-Schottky structures with an InGaAs wetting layer as active layer in the intrinsic region. From this we have fabricated PhCCs with narrow electrodes, which provide an electric connection to the defect and allow for photocurrent (PC) readout. The samples were first characterized by PC spectroscopy under resonant cw excitation [1]. The measured Q factors are around 5000. Double pulse excitation was realized by a 3.5 ps Ti:Sa laser followed by a Michelson interferometer. The pulse separation and relative phase could be precisely controlled over a long range. Changing the time delay we simultaneously monitored the interferogram (i) of the laser fields and (ii) of the cavity response using photocurrent detection. The excitation wavelength was chosen to be either on the cavity resonance or in defined detuning conditions. Our experiments clearly show the coherent control of the PhCC and its phase evolution with respect to the driving laser field. [1] W. Quiring et. al, Appl. Phys. Lett. 107, 041113 (2015)