Baghramyan Henrikh M, Barseghyan Manuk G, Kirakosyan Albert A, Ojeda Judith H, Bragard Jean, Laroze David
Instituto de Alta Investigación, CEDENNA, Universidad de Tarapacá, Casilla 7D, Arica, Chile.
Armenian State Pedagogical University after Khachatur Abovyan, Tigran Mets ave. 17, Yerevan, 0010, Armenia.
Sci Rep. 2018 Apr 18;8(1):6145. doi: 10.1038/s41598-018-24494-w.
The rendering of different shapes of just a single sample of a concentric double quantum ring is demonstrated realizable with a terahertz laser field, that in turn, allows the manipulation of electronic and optical properties of a sample. It is shown that by changing the intensity or frequency of laser field, one can come to a new set of degenerated levels in double quantum rings and switch the charge distribution between the rings. In addition, depending on the direction of an additional static electric field, the linear and quadratic quantum confined Stark effects are observed. The absorption spectrum shifts and the additive absorption coefficient variations affected by laser and electric fields are discussed. Finally, anisotropic electronic and optical properties of isotropic concentric double quantum rings are modeled with the help of terahertz laser field.
利用太赫兹激光场可实现对单个同心双量子环样本的不同形状进行呈现，这进而使得对样本的电子和光学性质进行操控成为可能。结果表明，通过改变激光场的强度或频率，能够在双量子环中得到一组新的简并能级，并在环之间切换电荷分布。此外，根据附加静电场的方向，可观察到线性和二次量子限制斯塔克效应。还讨论了受激光和电场影响的吸收光谱移动以及附加吸收系数变化。最后，借助太赫兹激光场对各向同性同心双量子环的各向异性电子和光学性质进行了建模。
