论文标题
碰撞诱导的C_60反振动松弛，通过状态分辨的非线性光谱探测
Collision-induced C_60 rovibrational relaxation probed by state-resolved nonlinear spectroscopy
论文作者
论文摘要
最近，当通过缓冲气体碰撞冷却并用中红外频率梳子探测时，C60分子的量子分辨光谱法最近实现了。 C60的显着对称性和刚性促进了记录记录的最大分子的反振动量子状态分辨率，这也带来了新的机会和挑战，以探索这个多ATOM系统中量子状态之间的能量传递。在这里，我们结合了特异性的光学泵送，缓冲气体碰撞和超敏感内非线性光谱法，以启动和探测旋转振动能量转移和放松。这种方法为各种碰撞伙伴提供了C60碰撞能量转移的第一个详细表征，并确定了旋转和振动的非弹性碰撞横截面。这些结果与我们对碰撞的理论建模很好地比较，并建立了建立新的一类新型大分子的量子状态控制的途径。
Quantum state-resolved spectroscopy was recently achieved for C60 molecules when cooled by buffer gas collisions and probed with a midinfrared frequency comb. This rovibrational quantum state resolution for the largest molecule on record is facilitated by the remarkable symmetry and rigidity of C60, which also present new opportunities and challenges to explore energy transfer between quantum states in this many-atom system. Here we combine state-specific optical pumping, buffer gas collisions, and ultrasensitive intracavity nonlinear spectroscopy to initiate and probe the rotation-vibration energy transfer and relaxation. This approach provides the first detailed characterization of C60 collisional energy transfer for a variety of collision partners, and determines the rotational and vibrational inelastic collision cross sections. These results compare well with our theoretical modeling of the collisions, and establish a route towards quantum state control of a new class of unprecedentedly large molecules.
