DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Cho, Yong-Hoon | - |
dc.contributor.advisor | 조용훈 | - |
dc.contributor.author | Yeo, Hwan-Seop | - |
dc.date.accessioned | 2021-05-12T19:43:26Z | - |
dc.date.available | 2021-05-12T19:43:26Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=924324&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/284334 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 물리학과, 2020.8,[xii, 102 p. :] | - |
dc.description.abstract | Epitaxial semiconductor quantum dots (QDs) have been attractive to a quantum light source that emits a single photon as well as a polarization entangled photon pair because the QD can imitate the energy structure of an atom. Specifically, in principle, nitride QDs contribute toward polarization entanglement because of six-fold in-plane rotational symmetry and strong carrier confinement. However, the irregular shapes of the QD from the self-assembly method lower symmetry, which limits the demonstration of the polarization entanglement. In this thesis, the method for the formation of a three-fold symmetric group III-nitride quantum using a self-limited growth mechanism was investigated. The three-dimensional pyramidal structures were formed with selective area growth during a metalorganic chemical vapor deposition. In particular, the morphology evolution of unconventional triangular GaN pyramids was investigated. Moreover, the width of the finite truncation was controlled at the apex of the pyramid under the self-limited growth mechanism, and the triangular nitride QD was formed at the truncation. The triangular QD exhibit the suppression of fine structure splitting as compared to the previous self-assembled QDs. The calculation results support the optical property of QD, which is based on the k∙p theoretical model accompanied by a configuration interaction method. As a result, the control of the symmetry of nitride QD is available through the method proposed in this thesis. Therefore, this work suggests that a polarization-entangled photon emitter can be realized using a group III-nitride QD in the future. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | MOCVD▼aMorphology control of nanostructure▼agroup III-nitride quantum dot▼aSelf-limited growth mechanism▼aControl of quantum dot symmetry▼aBiexciton-exciton cascade▼aFine-structure splitting of quantum dot▼aSingle photon source | - |
dc.subject | 금속유기화학증착법▼a나노구조체 모양제어▼a질화물반도체 양자점▼a자기제한성장법▼a양자점 대칭성제어▼a쌍엑시톤-엑시톤 연쇄▼a양자점 미세구조분리▼a단일광자방출기 | - |
dc.title | Study on formation of three-fold symmetric group III-nitride quantum dot using self-limited growth mechanism: Towards generation of polarization entangled photon pair | - |
dc.title.alternative | 자기제한성장법을 이용하여 삼각대칭성을 갖는 질화물반도체 양자점 형성에 관한 연구: 편광얽힘 광자쌍 발생기로의 응용 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :물리학과, | - |
dc.contributor.alternativeauthor | 여환섭 | - |
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