Poellmann, C. and Leierseder, U. and Galopin, E. and Lemaitre, A. and Amo, A. and Bloch, J. and Huber, R. and Menard, J. -M. (2015) Microcavity design for low threshold polariton condensation with ultrashort optical pulse excitation. JOURNAL OF APPLIED PHYSICS, 117 (20): 205702. ISSN 0021-8979, 1089-7550
Full text not available from this repository. (Request a copy)Abstract
We present a microcavity structure with a shifted photonic stop-band to enable efficient non-resonant injection of a polariton condensate with spectrally broad femtosecond pulses. The concept is demonstrated theoretically and confirmed experimentally for a planar GaAs/AlGaAs multilayer heterostructure pumped with ultrashort near-infrared pulses while photoluminescence is collected to monitor the optically injected polariton density. As the excitation wavelength is scanned, a regime of polariton condensation can be reached in our structure at a consistently lower fluence threshold than in a state-of-the-art conventional microcavity. Our microcavity design improves the polariton injection efficiency by a factor of 4, as compared to a conventional microcavity design, when broad excitation pulses are centered at a wavelength of lambda = 740 nm. Most remarkably, this improvement factor reaches 270 when the excitation wavelength is centered at 750 nm. (c) 2015 AIP Publishing LLC.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 Jul 2019 07:33 |
| Last Modified: | 18 Jul 2019 07:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5478 |
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