论文标题
损失补偿和增强的中红外相互作用与未检测到的光子
Loss compensated and enhanced mid-infrared interaction-free sensing with undetected photons
论文作者
论文摘要
通过未检测到的光子传感能够测量与检测到的波长不同的波长的吸收和相移。在这里，我们通过实验地绘制非分类非线性干涉仪中的平衡和损耗参数空间，显示了尽管在检测波长处内部损失，灵敏度的恢复。我们进一步探索了一种无互动操作模式，检测器与样本事件的光功率比为200。这允许在1550 nm处检测到3.4 $ $ m波长的AttOWATT功率水平的变化，免疫黑色背景的水平。这揭示了一种能够有效探测样品“在黑暗中”的超敏感红外成像方法。
Sensing with undetected photons enables the measurement of absorption and phase shifts at wavelengths different from those detected. Here, we experimentally map the balance and loss parameter space in a non-degenerate nonlinear interferometer, showing the recovery of sensitivity despite internal losses at the detection wavelength. We further explore an interaction-free operation mode with a detector-to-sample incident optical power ratio of >200. This allows changes in attowatt levels of power at 3.4 $μ$m wavelength to be detected at 1550 nm, immune to the level of thermal black-body background. This reveals an ultra-sensitive infrared imaging methodology capable of probing samples effectively `in the dark'.
