Intermolecular vibrational energy transfer enabled by microcavity strong light-matter coupling
Intermolecular vibrational energy transfer enabled by microcavity strong light-matter coupling
复制标题
DOI：
10.1126/science.aba3544
复制
发表时间：
2020-05-08
期刊：
影响因子：
56.9
通讯作者：
Xiong, Wei
中科院分区：
文献类型：
--
作者：
Xiang, Bo;Ribeiro, Raphael F.;Xiong, Wei
液相中分子间的选择性振动能量传递是一个困难的过程，受弱分子间力的阻碍，它是通过腔光子模式与供体和受体分子之间的强耦合形成的极化实现的。利用泵浦探针和二维红外光谱研究发现，在5皮秒内，主要由给体组成的上极化激子的激发可以有效地放松到受体。增加腔寿命可以进一步提高能量传递效率，表明能量传递是一个极化过程。这种振动能量传递途径为远程化学、传感机制和振动极化子凝聚的应用打开了大门。
Selective vibrational energy transfer between molecules in the liquid phase, a difficult process hampered by weak intermolecular forces, isachieved through polaritons formed by strong coupling between cavity photon modes and donor and acceptor molecules. Using pump-probe and two-dimensional infrared spectroscopy, we found that the excitation of the upper polariton, which is composed mostly of donors, can efficiently relax to the acceptors within-5 picoseconds. The energy-transfer efficiency can be further enhanced by increasing the cavity lifetime, suggesting that the energy transfer is a polaritonic process. This vibrational energy-transfer pathway opens doors for applications in remote chemistry, sensing mechanisms, and vibrational polariton condensation.