The linear and non-linear optical absorption coefficients of a $D_2^{+}$ artificial molecule confined in GaAs nano-scaled rings under a threading magnetic field were calculated. The results showed that by varying the position and the angle formed by the double-donor system, the total optical absorption can be enhanced, quenched, or even totally nullified. On the other hand, small changes of the optical response close to 2% due to external hydrostatic pressure fields or sample temperature variations within the ranges 0–30 kbar and 4–400 K, respectively, were obtained. In addition, reducing the aluminum concentration in the surrounding matrix significantly enhanced the optical absorption. A careful analysis was carried out in order to determine the conditions that will avoid an overflow of the wavefunction and that complement the previously obtained results. Furthermore, oscillatory behavior of the optical absorption with the magnetic field was observed. By increasing the QR’s radius, a red-shift of the total optical absorption spectra was observed, allowing the tuning of the resonance peaks below $20$ meV (also known as the THz band).

的线性和非线性光吸收系数 $D_2^{+}$计算了在穿透磁场下限制在 GaAs 纳米级环中的人工分子。结果表明，通过改变双供体系统形成的位置和角度，可以增强、淬灭甚至完全消除总光吸收。另一方面，由于外部静水压力场或样品温度分别在 0-30 kbar 和 4-400 K 范围内变化，光学响应的​​微小变化接近 2%。此外，降低周围基质中的铝浓度显着增强了光吸收。进行了仔细分析以确定将避免波函数溢出并补充先前获得的结果的条件。此外，观察到光吸收随磁场的振荡行为。通过增加 QR 的半径，观察到总光吸收光谱的红移，允许调谐低于$20$ meV（也称为太赫兹频段）。