Novel Optical Properties of the Composites of InGaN/GaN Multiple Quantum Wells and CdSe Quantum Dots With Metal Nanoparticles

• Main Authors: Zong-Lin Tsai, 蔡宗霖
• Other Authors: Yang-Fang Chen
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/95667227750555374563

碩士 === 國立臺灣大學 === 物理研究所 === 94 === We have demonstrated an alternative approach to obtain large enhancement of photoluminescence (PL) intensity in the composites of InGaN/GaN multiple quantum wells (MQWs) and CdSe/ZnS quantum dots (QDs) based on the combined effect of the Förster energy transfer and surface plasmon resonance. The relaxation dynamics has been investigated by both of steady-state and time-resolved PL measurements. It is found that the optimized enhancement can be achieved by the energy band alignment between MQWs and QDs and the resonance between the transition in QDs and the surface plasmon absorption in metal nanoparticles. Our approach provides a useful guideline for creating highly efficient optoelectronic devices.