Ensemble of asymmetric quantum dots in a cavity as a terahertz laser source
Ensemble of asymmetric quantum dots in a cavity as a terahertz laser source
复制标题
腔内不对称量子点的集合作为太赫兹激光源
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Alodjants
中科院分区：
文献类型：
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作者：
I. Chestnov;V. A. Shakhnazaryan;I. Shelykh;A. Alodjants
讨论了在高Q值太赫兹腔中强光场与非对称量子点系综相互作用形成的修饰态之间的跃迁处产生太赫兹激光的可能性。结果表明，修饰态系统中的粒子数反转是由于量子点激发态的自发弛豫而实现的。在平均场近似下，分析了腔模的缀饰态布居数、偏振态和布居数之差的麦克斯韦-布洛赫方程组。激光条件已被澄清，控制太赫兹辐射强度的可能性进行了研究，包括量子点的非均匀加宽系综的情况下。
The possibility of establishing a terahertz laser generation at a transition between the dressed states formed by the interaction of an intense optical field with an ensemble of asymmetric quantum dots (QDs) in a high-Q terahertz cavity is discussed. It has been shown that the population inversion in the system of dressed states is achieved owing to spontaneous relaxation of the excited state of the QDs. The set of Maxwell–Bloch equations for the difference between dressed-state populations, polarization, and population of the cavity mode has been analyzed in the mean-field approximation. The lasing conditions have been clarified and the possibility of controlling the terahertz radiation intensity has been studied, including the case of an inhomogeneously broadened ensemble of QDs.