Photoluminescence spectra and level repulsion in quantum wires

被引：1

作者：

Feltrin, A ^{[1
]}

Crottini, A ^{[1
]}

Dupertuis, MA ^{[1
]}

Staehli, JL ^{[1
]}

Deveaud, B ^{[1
]}

Savona, V ^{[1
]}

Wang, XL ^{[1
]}

Ogura, M ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Photon & Elect Quant, CH-1015 Lausanne, Switzerland

来源：

8TH CONFERENCE ON OPTICS OF EXCITONS IN CONFINED SYSTEMS (OECS-8) | 2004年

关键词：

D O I：

10.1002/pssc.200304026

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Luminescence spectra of V-groove GaAs/AlGaAs quantum wires are investigated by spatially resolved photoluminescence (PL) spectroscopy using a low temperature scanning near-field optical microscope (SNOM). The statistical analysis of these spectra in terms of the autocorrelation function reveals the presence of level repulsion. We find that the comparison between the experimental autocorrelation curve and the theoretical one obtained from the simulation of PL spectra, assuming for each exciton state a Lorentzian lineshape, is unsatisfactory. This is due to the presence of a broad background in the measured spectra, which is absent in the simulated ones. We propose an improvement of the theoretical model in order to include this feature and propose as explanation for the origin of this broad background the coupling between a single exciton state and the phonon thermal bath. The addition of this last element in our model is very important to establish a better quantitative agreement between the simulated and measured autocorrelation functions.

引用

页码：506 / 509

页数：4

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