Sarkar, D.; Van Der Meulen, H.P.; Calleja, J.M.; Meyer, J.M.; Haug, R.J.; Pierz, K.: Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots. In: Applied Physics Letters 92 (2008), Nr. 18, 181909. DOI:
https://doi.org/10.1063/1.2920441
Abstract: |
Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is observed. In particular, a resonance at 41 meV is attributed to the AlAs-like mode of InAlAs with low Al content. Our results represent a direct optical measure of the intermixing (estimated below 10%) in a single quantum dot. They also demonstrate that all LO phonons of this mixed quantum dot system couple to the exciton states. © 2008 American Institute of Physics.
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License of this version: |
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Publication type: |
Article |
Publishing status: |
publishedVersion |
Publication date: |
2008 |
Keywords english: |
Absorption spectra, Excited states, Phonons, Photoexcitation, Photoluminescence spectroscopy, Resonance, Semiconducting indium compounds, Intermixing, Photoluminescence excitation spectroscopy, Resonant absorption, Resonant optical excitation, Single quantum dots, Semiconductor quantum dots
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DDC: |
530 | Physik
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