The exciton Stark shift and polarization in hemispherical quantum dots (HQDs) each as a function of strength and orientation of applied electric field are theoretically investigated by an exact diagonalization method. A highly anisotropic Stark redshift of exciton energy is found. As the electric field is rotated from Voigt to Faraday geometry, the redshift of exciton energy monotonically decreases. This is because the asymmetric geometric shape of the hemispherical quantum dot restrains the displacement of the wave function to the higher orbital state in response to electric field along Faraday geometry. A redshift of hole energy is found all the time while a transition of electron energy from this redshift to a blueshift is found as the field is rotated from Voigt to Faraday geometry. Taking advantage of the diminishing of Stark effect along Faraday geometry, the hemispherical shapes can be used to improve significantly the radiative recombination efficiency of the polar optoelectronic devices if the strong internal polarized electric field is along Faraday geometry.

半球形量子点 (HQD) 中的激子斯塔克位移和极化分别作为所施加电场的强度和方向的函数，通过精确对角化方法在理论上进行了研究。发现了激子能量的高度各向异性斯塔克红移。随着电场从福伊特几何旋转到法拉第几何，激子能量的红移单调减少。这是因为半球形量子点的不对称几何形状限制了波函数响应于沿法拉第几何形状的电场而向更高轨道状态的位移。始终发现空穴能量的红移，而当场从福伊特几何旋转到法拉第几何时，发现电子能量从这种红移到蓝移的转变。