CAJ | 학술논문

使用矩阵对角化方法,研究了磁场中两电子量子环自旋单态和三重态的电学和光学性质,发现磁场强度对两电子量子环的能谱和光吸收有强烈的影响.计算结果显示两电子量子环的光吸收系数可以达到107/m,这个结果要比两电子量子点高一个数量级.通过引入磁场和改变量子环半径可以获得较大的吸收系数.
사용구진대각화방법,연구료자장중량전자양자배자선단태화삼중태적전학화광학성질,발현자장강도대량전자양자배적능보화광흡수유강렬적영향.계산결과현시량전자양자배적광흡수계수가이체도107/m,저개결과요비량전자양자점고일개수량급.통과인입자장화개변양자배반경가이획득교대적흡수계수.
In this paper, the electronic and optical properties d a two-electron quantum ring subjected to an external magnetic field are studied by means of the numerical diagonalization of the Hamiltonian matrix for the spin-singlet and the spin-triplet states,respectively. We have found that magnetic field has strong effects on the energy and the optical absorptions of a two-electron quantum ring. The results show that the optical absorption coefficients obtained in a two-electron quantum ring can reach the magnitude of 107/m, which is one order of magnitude higher than that in a two-electron quantum dot. The larger optical absorption coefficients can be obtained by inducing the magnetic field and changing the ring radius.