NONLINEAR OPTICAL PROPERTIES OF THE WURTZITE InGaN/AlGaN PARABOLIC QUANTUM DOT

作者：Chen, Tairong^*; Xie, Wenfang; Liang, Shijun

来源：Nano, 2013, 8(2): 1350019.

DOI：10.1142/S1793292013500197

• Wurtzite QD
• absorption coefficient
• refractive index
• built-in electric

The linear and nonlinear optical properties in a wurtzite InxGa1-xN/AlyGa1-yN strained spherical quantum dot (QD) subjected to a uniform external electric field with a direction opposite to that of the built-in electric (BEF) within the framework of effective-mass approximation have been investigated. The results show that the BEF has great effects on the linear and nonlinear optical absorption coeficients (ACs) and refractive index (RI) changes. Moreover, the dependence of the linear and nonlinear optical properties on the In composition, on the Al composition and on the inner sphere radius has been studied in detail. It is indicated that the ACs and RI changes of the Wurtzite spherical QD have strongly affected by these factors. The results may make a significant contribution to designing some important photodetectors and photonic crystal devices.

• 出版日期2013-4
• 单位广州大学