Molecular vibrational polariton: Its dynamics and potentials in novel chemistry and quantum technology
Molecular vibrational polariton: Its dynamics and potentials in novel chemistry and quantum technology
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DOI：
10.1063/5.0054896
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发表时间：
2021-08-07
影响因子：
4.4
通讯作者：
Xiong, Wei
中科院分区：
文献类型：
--
作者：
Xiang, Bo;Xiong, Wei
分子振动极化激元是分子振动模与光子腔模强耦合形成的杂化准粒子，由于其对化学反应的特殊影响而引起化学物理界的极大关注。与此同时，极化激元的半光子半物质特性使它们适合从两个方面拥有属性，并导致对光子和量子技术应用有用的新特性。为了最终将极化激元用于化学和量子应用，理解它们的动力学至关重要。由于凝聚相中的腔模式和分子振动模式的固有时间尺度，极化激元可以在超快时间尺度上经历动力学，例如，从极化激元到暗模的弛豫。因此，超快振动光谱成为研究这种动力学的理想工具。在这个角度来看，我们给出了最近的超快光谱工作，我们的小组和其他人在该领域的概述。最近的工作表明，分子振动极化激元可以有不同的动力学从它的纯分子对应物，如分子间的振动能量转移和热振动动力学。然后，我们讨论了一些当前的挑战和未来的机会，如可能使用超快振动动力学，以了解腔修改的反应和路线，以开发分子振动极化激元作为新的室温量子平台。
Molecular vibrational polaritons, a hybridized quasiparticle formed by the strong coupling between molecular vibrational modes and photon cavity modes, have attracted tremendous attention in the chemical physics community due to their peculiar influence on chemical reactions. At the same time, the half-photon half-matter characteristics of polaritons make them suitable to possess properties from both sides and lead to new features that are useful for photonic and quantum technology applications. To eventually use polaritons for chemical and quantum applications, it is critical to understand their dynamics. Due to the intrinsic time scale of cavity modes and molecular vibrational modes in condensed phases, polaritons can experience dynamics on ultrafast time scales, e.g., relaxation from polaritons to dark modes. Thus, ultrafast vibrational spectroscopy becomes an ideal tool to investigate such dynamics. In this Perspective, we give an overview of recent ultrafast spectroscopic works by our group and others in the field. These recent works show that molecular vibrational polaritons can have distinct dynamics from its pure molecular counterparts, such as intermolecular vibrational energy transfer and hot vibrational dynamics. We then discuss some current challenges and future opportunities, such as the possible use of ultrafast vibrational dynamics, to understand cavity-modified reactions and routes to develop molecular vibrational polaritons as new room temperature quantum platforms.