标题： 量子增强等离子体传感 显示英文标题

标题： Quantum-Enhanced Plasmonic Sensing

摘要： 量子资源可以将设备的灵敏度提升至超越经典散粒噪声极限的水平，并通过开发量子增强传感器，从而彻底改变计量学领域。 特别是，等离子体传感器在生物和化学传感应用中被广泛使用，为将这种增强效果带入实际设备提供了独特的机会。 在此，我们使用明亮的纠缠双光束来提高用于测量折射率局部变化的等离子体传感器的灵敏度。 我们展示了最先进的等离子体传感器灵敏度提高了56%，测量灵敏度达到$10^{-10}$RIU$/\sqrt{\textrm{Hz}}$的量级，比之前量子增强等离子体传感器的原理性实现高出近5个数量级。 这些结果有望显著提升超痕量无标记等离子体传感，并将在从生物医学应用到化学检测的多个领域得到应用。 显示英文摘要

摘要： Quantum resources can enhance the sensitivity of a device beyond the classical shot noise limit and, as a result, revolutionize the field of metrology through the development of quantum-enhanced sensors. In particular, plasmonic sensors, which are widely used in biological and chemical sensing applications, offer a unique opportunity to bring such an enhancement to real-life devices. Here, we use bright entangled twin beams to enhance the sensitivity of a plasmonic sensor used to measure local changes in refractive index. We demonstrate a 56% quantum enhancement in the sensitivity of state-of-the-art plasmonic sensor with measured sensitivities on the order of $10^{-10}$RIU$/\sqrt{\textrm{Hz}}$, nearly 5 orders of magnitude better than previous proof-of-principle implementations of quantum-enhanced plasmonic sensors. These results promise significant enhancements in ultratrace label free plasmonic sensing and will find their way into areas ranging from biomedical applications to chemical detection.