An optical non-linearity at the single-photon level is reported with a semiconductor quantum dot–cavity device. The device performs as an efficient single-photon filter that strongly suppresses the multiphoton components of incident coherent pulses.

中文翻译：

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固态单光子滤波器

用半导体量子点腔器件报告了单光子级的光学非线性。该器件可作为有效的单光子滤波器来有效抑制入射相干脉冲的多光子分量。