论文标题
芯片上的光学推扫帚
Optical Push Broom On a Chip
论文作者
论文摘要
在这里，我们报告了硅波导中的折射率前面捕获光捕获的第一次实验证明，即光推扫帚效应。由快速泵脉冲产生的前部收集并捕获较小的组速度的CW信号的能量，并调整到波导中引入的Bragg光栅的带状距离附近。这种情况代表了在锥形等离子体波导中捕获光的光学类似物，在没有反射的情况下停止光线。 CW信号的能量积聚在正面内部并以频率分布。在该实验中，通过硅波导中的两个光子吸收产生了2 ps的载体前部。它收集了大约30 ps的CW信号。提出的效果可用于在时间和空间中压缩信号。
Here we report the first experimental demonstration of light trapping by a refractive index front in a silicon waveguide, the optical push broom effect. The front generated by a fast pump pulse collects and traps the energy of a CW signal with smaller group velocity and tuned near to the band gap of the Bragg grating introduced in the waveguide. This situation represents an optical analogue of light trapping in a tapered plasmonic waveguide where light is stopped without reflection. The energy of the CW signal is accumulated inside the front and distributed in frequency. In this experiment a 2 ps free carrier front was generated via two photon absorption of the pump in silicon waveguide. It collects approximately a 30 ps long packet of the CW signal. The presented effect can be utilized to compress signals in time and space.
