标题： 利用气体填充空芯光纤中的复合共振实现激光制冷 显示英文标题

标题： Laser refrigeration using exciplex resonances in gas filled hollow-core fibres

摘要： 我们从理论上研究了基于填充空芯光纤的激基复合物介导频率上转换的宏观尺度激光制冷新途径的前景与局限性。 利用经过验证的量子光学速率方程，我们模拟了充满光泵浦波导的掺杂剂-缓冲气体混合物的动力学行为。 在碱金属-惰性气体混合物的特定例子中，最近的高压气体电池实验表明，通过产生瞬态激基复合物激发电子束缚态，可以实现有效的动能提取循环。 冷却循环包括在碰撞过程中吸收低能激光光子，随后碱金属原子线上的蓝移自发发射。 对于任意掺杂剂-缓冲气体混合物，我们推导出冷却功率、冷却速率和温度下降随输入激光功率、掺杂剂和缓冲气体浓度、光纤几何形状以及激基复合物基态和激发态势能景观特性的变化规律。 显示英文摘要

摘要： We theoretically study prospects and limitations of a new route towards macroscopic scale laser refrigeration based on exciplex-mediated frequency up-conversion in gas filled hollow-core fibres. Using proven quantum optical rate equations we model the dynamics of a dopant-buffer gas mixture filling an optically pumped waveguide. In the particular example of alkali-noble gas mixtures, recent high pressure gas cell setup experiments have shown that efficient kinetic energy extraction cycles appear via the creation of transient exciplex excited electronic bound states. The cooling cycle consists of absorption of lower energy laser photons during collisions followed by blue-shifted spontaneous emission on the atomic line of the alkali atoms. For any arbitrary dopant-buffer gas mixture, we derive scaling laws for cooling power, cooling rates and temperature drops with varying input laser power, dopant and buffer gas concentration, fibre geometry and particularities of the exciplex ground and excited state potential landscapes.