Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields
碩士 === 國立交通大學 === 電子物理系所 === 102 === Generation of entangled photon pairs is a key element in quantum optics, communication and cryptography. Semiconductor quantum dots (QDs) are considered as an ideal entangled photon pair emitter due to their three-dimensional confinement of electrons and holes. I...
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ndltd-TW-102NCTU54290282015-10-14T00:18:21Z http://ndltd.ncl.edu.tw/handle/72601292272543995295 Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields 外加垂直電場下砷化鎵/砷化鋁鎵量子點的精細結構 Chou, Ying-Lin 周穎霖 碩士 國立交通大學 電子物理系所 102 Generation of entangled photon pairs is a key element in quantum optics, communication and cryptography. Semiconductor quantum dots (QDs) are considered as an ideal entangled photon pair emitter due to their three-dimensional confinement of electrons and holes. In this thesis I theoretically investigate the energy spectra, optical polarizations and fine structure splittings of GaAs/AlGaAs quantum dots grown by droplet epitaxy (DE) under external vertical electric fields. We build up a theory for electron-hole exchange in the framework of multi band k.p theory. Compared with the widely studied InAs/GaAs self-assembled QDs, the sizes of DE-QDs are so large that the valence band mixing (VBM) is significant in the optical properties. The VBM effects on fine structure splittings (FSS), intensities and degrees of polarizations of the emitted photon pairs from the biased QDs are investigated. Cheng, Shun-Jen 鄭舜仁 2014 學位論文 ; thesis 50 zh-TW |
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碩士 === 國立交通大學 === 電子物理系所 === 102 === Generation of entangled photon pairs is a key element in quantum optics, communication and cryptography. Semiconductor quantum dots (QDs) are considered as an ideal entangled photon pair emitter due to their three-dimensional confinement of electrons and holes. In this thesis I theoretically investigate the energy spectra, optical polarizations and fine structure splittings of GaAs/AlGaAs quantum dots grown by droplet epitaxy (DE) under external vertical electric fields. We build up a theory for electron-hole exchange in the framework of multi band k.p theory. Compared with the widely studied InAs/GaAs self-assembled QDs, the sizes of DE-QDs are so large that the valence band mixing (VBM) is significant in the optical properties. The VBM effects on fine structure splittings (FSS), intensities and degrees of polarizations of the emitted photon pairs from the biased QDs are investigated.
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Cheng, Shun-Jen |
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Cheng, Shun-Jen Chou, Ying-Lin 周穎霖 |
author |
Chou, Ying-Lin 周穎霖 |
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Chou, Ying-Lin 周穎霖 Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
author_sort |
Chou, Ying-Lin |
title |
Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
title_short |
Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
title_full |
Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
title_fullStr |
Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
title_full_unstemmed |
Fine structures of droplet-epitaxial GaAs/AlGaAs quantum dots under vertical electric fields |
title_sort |
fine structures of droplet-epitaxial gaas/algaas quantum dots under vertical electric fields |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/72601292272543995295 |
work_keys_str_mv |
AT chouyinglin finestructuresofdropletepitaxialgaasalgaasquantumdotsunderverticalelectricfields AT zhōuyǐnglín finestructuresofdropletepitaxialgaasalgaasquantumdotsunderverticalelectricfields AT chouyinglin wàijiāchuízhídiànchǎngxiàshēnhuàjiāshēnhuàlǚjiāliàngzidiǎndejīngxìjiégòu AT zhōuyǐnglín wàijiāchuízhídiànchǎngxiàshēnhuàjiāshēnhuàlǚjiāliàngzidiǎndejīngxìjiégòu |
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