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首页> 外文期刊>Superlattices and microstructures >Linear and nonlinear optical properties of strained GaN/AIN quantum dots: Effects of impurities, radii of QDs, and the incident optical intensity
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Linear and nonlinear optical properties of strained GaN/AIN quantum dots: Effects of impurities, radii of QDs, and the incident optical intensity

机译：应变GaN / AIN量子点的线性和非线性光学性质：杂质，量子点半径和入射光强度的影响

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摘要

The linear and nonlinear optical properties of cylinder GaN/AIN quantum dots with strain effects and impurity are investigated by taking into account the effects of the deformation potential and piezoelectric potential on the conduction band edge. The results are presented as a function of photon energies and QD radii. The optical absorption spectrum and refractive index changes have a blueshift in the presence of the impurity. With increasing distance of the impurity's position along the growth direction, the peak values of the refractive index changes decrease and shift to higher photon energy. When the sizes of the QDs increase, redshift effects are observed and the relative amplitudes diminish. It can be found that the nonlinear effect becomes obvious with increase of the incident optical intensity. Then there is a "hole-burning" in the absorption coefficient spectra and two new peaks will appear in the total refractive index change spectrum when the optical intensity becomes larger enough. Finally it can be concluded that the intensity of the incident light and the position of the impurity play an important role in the linear and nonlinear optical properties.
机译：通过考虑形变电势和压电势对导带边缘的影响，研究了具有应变效应和杂质的圆柱GaN / AIN量子点的线性和非线性光学性质。结果表示为光子能量和QD半径的函数。在存在杂质的情况下，光吸收光谱和折射率变化具有蓝移。随着杂质沿生长方向的位置距离的增加，折射率的峰值减小，并转移到更高的光子能量上。当量子点的大小增加时，会观察到红移效应，并且相对振幅会减小。可以发现，随着入射光强度的增加，非线性效应变得明显。然后，在吸收系数光谱中出现“烧孔”现象，当光强度变得足够大时，在总折射率变化光谱中将出现两个新的峰。最后可以得出结论，入射光的强度和杂质的位置在线性和非线性光学性质中起着重要作用。

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  • 来源
    《Superlattices and microstructures》 |2010年第4期|p.434-441|共8页
  • 作者

    Lu Zhang; rnZhongyuan Yu; rnWenjie Yao; rnYumin Liu; rnHan Ye;

  • 作者单位

    Key Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Post and Telecommunications, Beijing 700876, PR China;

    rnKey Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Post and Telecommunications, Beijing 700876, PR China;

    rnKey Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Post and Telecommunications, Beijing 700876, PR China;

    rnKey Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Post and Telecommunications, Beijing 700876, PR China;

    rnKey Laboratory of Information Photonics and Optical Communication, Ministry of Education, Beijing University of Post and Telecommunications, Beijing 700876, PR China;

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  • 正文语种 eng
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  • 关键词

    impurity; nonlinear property; strain and piezoelectric properties; refractive index changes;

    机译：不纯;非线性特性应变和压电性能;折射率变化;

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