标题： 量子点柱形腔器件中少光子脉冲的光学非线性 显示英文标题

标题： Optical nonlinearity for few-photon pulses on a quantum dot-pillar cavity device

摘要： 在确定耦合的量子点-微柱系统中，在连续波和脉冲激发下均观察到了巨大的光学非线性，并处于显著的强耦合状态下。 通过绝对反射率测量，我们确定了腔内光子数临界值以及设备的输入和输出耦合效率。 由于接近 unity 的输入耦合效率，我们展示了每脉冲仅 8 个入射光子的非线性阈值记录。 发现输出耦合效率对这个非线性阈值有很强的影响。 我们展示了如何在现实设备中达到单光子非线性的基本极限，这将为两个同时到达的单光子提供有效的相互作用。 显示英文摘要

摘要： Giant optical nonlinearity is observed under both continuous-wave and pulsed excitation in a deterministically-coupled quantum dot-micropillar system, in a pronounced strong-coupling regime. Using absolute reflectivity measurements we determine the critical intracavity photon number as well as the input and output coupling efficiencies of the device. Thanks to a near-unity input-coupling efficiency, we demonstrate a record nonlinearity threshold of only 8 incident photons per pulse. The output-coupling efficiency is found to strongly influence this nonlinearity threshold. We show how the fundamental limit of single-photon nonlinearity can be attained in realistic devices, which would provide an effective interaction between two coincident single photons.