https://scholars.lib.ntu.edu.tw/handle/123456789/333518
標題: | Unusual optical properties of type-II InAs/GaAs0.7Sb0.3 quantum dots by photoluminescence studies | 作者: | T. T. Chen, C. L. Cheng, F. Y. Chang, C. T. Wu, C. H. Chen, HAO-HSIUNG LIN YANG-FANG CHEN |
公開日期: | 一月-2007 | 卷: | 75 | 期: | 3 | 起(迄)頁: | 033310 | 來源出版物: | Physics Review B | 摘要: | The optical properties of type-II InAs Ga As0.7 Sb0.3 quantum dots (QDs) were investigated by photoluminescence (PL). It is found that the peak position of PL spectra exhibits a significant blueshift under a moderate excitation level. The observed blueshift can be well explained by the band bending effect due to the spatially separated photoexcited carriers in a type-II band alignment. We also found that the PL spectra exhibit a strong in-plane polarization with a polarization degree up to 24%. The observed optical anisotropy is attributed to the inherent property of the orientation of chemical bonds at InAs Ga As0.7 Sb0.3 heterointerfaces. © 2007 The American Physical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-33846376908&doi=10.1103%2fPhysRevB.75.033310&partnerID=40&md5=f661614e2ce0eadd530ae12ad74a9ef9 | DOI: | 10.1103/PhysRevB.75.033310 |
顯示於: | 電機工程學系 |
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