The lifetime of free carriers in a silicon-on-insulator (SOI) rib waveguide, which is used for Raman amplification, is studied in connection with the nonlinear optical loss.

研究了用于喇曼放大的绝缘硅(SOI)脊形波导中自由载流子寿命与非线性光学损耗的关系。

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The results show that the magnetic field can effectively change the relative ratio between the singlet and the triplet polaron pairs, resulting in an increase in the density of the free carriers.

从聚合物光电池中光电流和暗电流的产生机制出发，对该现象进行了解释，认为外加磁场可以有效改变单重态极化子对和三重态极化子对之间的相对比例，进而使自由载流子浓度增加。

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The design incorporates a channel thin enough to become entirely devoid of carriers (ie, free electrons or holes) when switched off, thus acting as a valve, yet full of them when switched on.

这一设计包含了一条足够细的隧道，当它关闭时，里面完全没有载流子(电子或空穴)，当它打开时，里面便充满了载流子，起到了阀门的作用。

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In the U.S., the device is generally free at wireless carriers when customers sign a two-year service contract, and supply was constrained for much of the period.

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More importantly, sponsors and television carriers are free to take their business elsewhere as well.

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Contract-free "prepaid" carriers, on the other hand, leave consumers to pay the full price of a phone.

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