Department of Electrical and Computer Engineering, McGill University, Montreal, Canada.
Opt Lett. 2011 Sep 1;36(17):3506-8. doi: 10.1364/OL.36.003506.
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 μm) to infrared light (1.5 μm) optical-optical modulator taking advantage of the thermal-optical effect.
我们报告了在 InGaAs/GaAs 卷绕微管中选择性偏振模式激发的情况。这些微管是通过从其宿主 GaAs 衬底上选择性释放相干应变 InGaAs/GaAs 量子点层来制造的。光纤突然变细用于拾取微管，而绝热变细光纤用于将光耦合到微管的共振光学模式中。通过改变绝热变细光纤中光的偏振，可以在微管中观察到横向电场和横向磁场模式。我们还表明，微管可以用作红（0.6μm）到红外光（1.5μm）的光学-光学调制器，利用热光效应。
