کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1811920 | 1025604 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Studies on the second-harmonic generations in cubical quantum dots with applied electric field Studies on the second-harmonic generations in cubical quantum dots with applied electric field](/preview/png/1811920.png)
The second-harmonic generation (SHG) coefficient for cubical quantum dots (CQDs) with the applied electric field is theoretically investigated. Using the compact density-matrix approach and the iterative method, we get the analytical expression of the SHG coefficient. And the numerical calculations for the typical GaAs/AlAs CQDs are presented. The results show that the SHG coefficient can reach the magnitude of 10−5 m/V, about two orders higher than that in spherical quantum dot system. More importantly, the SHG coefficient is not a monotonic function of the length L of CQDs as well as the applied field F. If we select suitable values of F and L, we will get a higher value of the SHG coefficient. In addition, the relaxation rate also affects the SHG coefficient obviously.
Journal: Physica B: Condensed Matter - Volume 406, Issue 3, 1 February 2011, Pages 393–396