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首页> 外文期刊>Physica, B. Condensed Matter >Effect of the magnetic field on the nonlinear optical rectification and second and third harmonic generation in double delta-doped GaAs quantum wells
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Effect of the magnetic field on the nonlinear optical rectification and second and third harmonic generation in double delta-doped GaAs quantum wells

机译：磁场对双δ掺杂GaAs量子阱中非线性光学整流的影响及第二和第三谐波产生

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摘要

In this paper we are reporting the computation for the Nonlinear Optical Rectification (NOR) and the Second and Third Harmonic Generation (SHG and THG) related with electronic states of asymmetric double Si-d-doped quantum well in a GaAs matrix when this is subjected to an in-plane (x-oriented) constant magnetic field effect. The work is performed in the effective mass and parabolic band approximations in order to compute the electronic structure for the system by a diagonalization procedure. The expressions for the nonlinear optical susceptibilities, chi((2))(0), chi((2))(2 omega), and chi((3))(3 omega), are those arising from the compact matrix density formulation and stand for the NOR, SHG, and THG, respectively. This asymmetric double d-doped quantum well potential profile actually exhibits nonzero NOR, SHG, and THG responses which can be easily controlled by the in-plane (x-direction) externally applied magnetic field. In particular we find that for the chosen configuration the harmonic generation is in the far-infrared/ THz region, thus and becoming suitable building blocks for photodetectors in this range of the electromagnetic spectra.
机译：在本文中，我们报告了与GaAs矩阵中的非线性光学整流（NOR）和第二和第三谐波（SHG和第三谐波）和第二和第三谐波生成（SHG和THG）的计算在GAAs矩阵中在平面内（X取向）恒定磁场效应。该工作是在有效质量和抛物带近似下执行的，以便通过对角化过程计算系统的电子结构。非线性光学敏感性，CHI（（2））（0），CHI（（2））（2ω）和CHI（（3））（3ω）的表达是由紧凑的基质密度配方产生的那些并分别代表NOR，SHG和THG。这种不对称的双D掺杂量子阱电位型概况实际上表现出非零，SHG和ZG响应，其可以容易地由面内施加的磁场控制。特别地，我们发现，对于所选择的配置，谐波产生在远红外/ THz区域中，因此成为电磁光谱的该范围内的光电探测器的合适构建块。

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