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Selective polarization mode excitation in InGaAs/GaAs microtubes

机译:InGaAs / GaAs微管中的选择性极化模式激发

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We report on selective polarization mode excitation in InGaAs/GaAs rolled-up microtubes. The microtubes are fabricated by selectively releasing a coherently strained InGaAs/GaAs quantum dot layer from its host GaAs substrate. An optical fiber abrupt taper is used to pick up the microtube, while an adiabatically tapered optical fiber is used to couple light into the resonant optical modes of the microtube. By varying the polarization of the light in the adiabatically tapered fiber both transverse electric and transverse magnetic modes are observed in the microtube. We also show that the microtube can be used as a red (0.6 (mu)m) to infrared light (1.5 (mu)m) optical-optical modulator taking advantage of the thermal-optical effect.
机译:我们报告InGaAs / GaAs卷起微管中的选择性极化模式激发。通过选择性地从其主体GaAs衬底释放相干应变的InGaAs / GaAs量子点层来制造微管。光纤突然锥化用于拾取微管,而绝热锥形光纤用于将光耦合到微管的共振光学模式中。通过改变绝热锥形光纤中光的偏振,可以在微管中观察到横向电和横向磁模。我们还表明,利用热光效应,微管可用作红色(0.6μm)至红外光(1.5μm)的光学调制器。

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