Ultrafast Depopulation of a Quantum Dot by LA-phonon-assisted Stimulated Emission
| Autor: | Vollrath M. Axt, Andreas M. Barth, M. S. Skolnick, A. M. Fox, L.M.P.P. Martins, J. H. Quilter, Feng Liu, Alistair J. Brash |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Range (particle radiation) Condensed Matter - Mesoscale and Nanoscale Physics Phonon Relaxation (NMR) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Laser Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Pulse (physics) law.invention Quantum dot law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Stimulated emission Atomic physics 010306 general physics 0210 nano-technology Ultrashort pulse |
| Zdroj: | ResearcherID |
| ISSN: | 2469-9950 |
| Popis: | We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a redshifted laser pulse. The QD is turned from a weakly vibronic system into a strongly vibronic one by laser driving which enables the phonon-assisted relaxation between the excitonic components of two dressed states. The depopulation is achieved within a laser pulse-width-limited time of 20 ps and exhibits a broad tuning range of a few meV. Our experimental results are well reproduced by path-integral calculations. 5 pages, 4 figures, presented in FOPS2015, EQEP2015, and MSS-17 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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