تقرير
Dynamic Acoustic Control of Individual Optically Active Quantum Dot-like Emission Centers in Heterostructure Nanowires
| العنوان: | Dynamic Acoustic Control of Individual Optically Active Quantum Dot-like Emission Centers in Heterostructure Nanowires |
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| المؤلفون: | Weiß, Matthias, Kinzel, Jörg B., Schülein, Florian J. R., Heigl, Michael, Rudolph, Daniel, Morkötter, Stefanie, Döblinger, Markus, Bichler, Max, Abstreiter, Gerhard, Finley, Jonathan J., Koblmüller, Gregor, Wixforth, Achim, Krenner, Hubert J. |
| المصدر: | Nano Letters 14, 2256 (2014) |
| سنة النشر: | 2014 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Physics - Optics, Quantum Physics |
| الوصف: | We probe and control the optical properties of emission centers forming in radial het- erostructure GaAs-Al0.3Ga0.7As nanowires and show that these emitters, located in Al0.3Ga0.7As layers, can exhibit quantum-dot like characteristics. We employ a radio frequency surface acoustic wave to dynamically control their emission energy and occupancy state on a nanosec- ond timescale. In the spectral oscillations we identify unambiguous signatures arising from both the mechanical and electrical component of the surface acoustic wave. In addition, differ- ent emission lines of a single quantum dot exhibit pronounced anti-correlated intensity oscilla- tions during the acoustic cycle. These arise from a dynamically triggered carrier extraction out of the quantum dot to a continuum in the radial heterostructure. Using finite element modeling and Wentzel-Kramers-Brillouin theory we identify quantum tunneling as the underlying mech- anism. These simulation results quantitatively reproduce the observed switching and show that in our systems these quantum dots are spatially separated from the continuum by > 10.5 nm. Comment: This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in Nano Letters, copyright \c{copyright} American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/nl4040434 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1021/nl4040434 |
| URL الوصول: | http://arxiv.org/abs/1410.2048 |
| رقم الأكسشن: | edsarx.1410.2048 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1021/nl4040434 |
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