Center for Photonic Communication and Computing, EECS Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3118, USA.
Opt Lett. 2010 Jul 15;35(14):2376-8. doi: 10.1364/OL.35.002376.
We propose a quantum switch for telecom-band applications that is composed of a chi((2)) microdisk coupled to two fibers (or waveguides). The idea is to apply a pump pulse to shift the microdisk out of resonance, thereby switching the device between the cross and bar states in an interaction-free manner. As an example, a 2.5-microm-thick, 10 microm radius GaAs microdisk with an intrinsic Q of approximately 10(8) and a fiber-cavity-coupling Q of approximately 10(4) can achieve low-loss (< or approximately equal to 1%) switching for gigahertz-rate O-band quantum signals with milliwatt-peak-power pumps in the C band.
我们提出了一种用于电信波段应用的量子开关，它由一个 χ((2))微盘与两个光纤（或波导）耦合而成。其思想是施加泵浦脉冲以将微盘移出共振，从而以无相互作用的方式在交叉和条形状态之间切换器件。例如，一个 2.5 微米厚、10 微米半径的 GaAs 微盘，具有约为 10(8)的固有 Q 值和约为 10(4)的光纤腔耦合 Q 值，用 C 波段的兆瓦峰值功率泵浦，可以实现低损耗（<或约等于 1%）的千兆赫速率 O 波段量子信号的开关。
