Second-order correlation function from asymmetric to symmetric transitions due to spectrally indistinguishable biexciton cascade emission
| Autor: | Kun Ding, Haijun Zhu, Xuefei Wu, Xiuming Dou, Zhichuan Niu, Haiqiao Ni, Desheng Jiang, Baoquan Sun, Peng-Yu Zhou, Cui-Lan Zhao |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Photon Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter::Other Exciton Binding energy General Physics and Astronomy FOS: Physical sciences Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter - Other Condensed Matter Correlation function Cascade Quantum dot Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physics::Accelerator Physics Atomic physics Excitation Biexciton Other Condensed Matter (cond-mat.other) |
| Popis: | We report the observed photon bunching statistics of biexciton cascade emission at zero time delay in single quantum dots by second-order correlation function g(2)(τ) measurements under continuous wave excitation. It is found that the bunching phenomenon is independent of the biexciton binding energy when it varies from 0.59 meV to nearly zero. The photon bunching takes place when the exciton photon is not spectrally distinguishable from the biexciton photon, and either of them can trigger the 'start' in a Hanbury–Brown and Twiss setup. However, if the exciton energy is spectrally distinguishable from the biexciton, the photon statistics will become asymmetric and a cross-bunching lineshape can be obtained. The theoretical calculations based on a model of three-level rate-equation analysis are consistent with the result of g(2) (τ) correlation function measurements. |
| Databáze: | OpenAIRE |
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