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Growth and optical properties of GaAsN alloys grown by RF-MBE

机译:RF-MBE生长的GaAsN合金的生长和光学性能

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摘要

Due to the optimization of the growth conditions of GaAsN alloys for higher N contents, GaAsN alloys with N contents up to 4.5 % were successfully grown by RF-MBE. The band gap energies were investigated by photoreflectance spectroscopy. In the low (<1%) content region, the bowing parameter is estimated as 22 eV by fitting to a quadratic curve. However the deviation of the experimental data from the fitting curve becomes large as N content increases. With the N content of 4.5%, the band gap energy of GaAsN is observed as low as 1.33 μm (0.93 eV).
机译:由于对高N含量的GaAsN合金的生长条件进行了优化,通过RF-MBE成功地生长了N含量高达4.5%的GaAsN合金。带隙能量通过光反射光谱法研究。在低含量(<1%)区域,通过拟合二次曲线可将弯曲参数估计为22 eV。然而,随着N含量的增加,实验数据与拟合曲线的偏差变大。当N含量为4.5%时,观察到GaAsN的带隙能低至1.33μm(0.93 eV)。

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