تقرير
Microcavity design for low threshold polariton condensation with ultrashort optical pulse excitation
| العنوان: | Microcavity design for low threshold polariton condensation with ultrashort optical pulse excitation |
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| المؤلفون: | Poellmann, C., Leierseder, U., Galopin, E., Lemaître, A., Amo, A., Bloch, J., Huber, R., Ménard, J. -M. |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics |
| الوصف: | 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 740 nm. Most remarkably, this improvement factor reaches 270 when the excitation wavelength is centered at 750 nm. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1605.04891 |
| رقم الأكسشن: | edsarx.1605.04891 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |