【摘要】 建立了一般意义上的单分子 -光子泵模型 ,并用计算机模拟了在不同能量的光子激发下单个分子作为制冷泵时的量子跃迁过程 ,研究了单分子 -光子泵处于基态和激发态时的热激发过程以及在发生荧光辐射时的声子参与情况 ,得出了基态具有较强的制冷能力的结论。基态和激发态在光吸收和发射过程中热力学效应是不同的 ,因此在选择反斯托克斯荧光制冷材料时 ,发光中心的基态能级劈裂更具重要性更多还原

【Abstract】 A model of Single Molecule Photon Cryocooler(SMPC) was built in generally meaning. Quantum transitions in single molecule, which was excited by photons with different energy and treated as a cryocooler , were simulated with computer. Frequencies and number of phonons, which participate in thermal excitation in ground state and in excited states and during fluorescence emitting, were studied. The conclusion that single molecule in ground state has more cooling power was obtained. So in optical absorption and emission process, the thermo dynamic effect in ground state is different from that in excited state for fluorescent cooling of single molecule. So, when we choose cooling material for anti Stokes fluorescent cooling usage, splits of the energy level in ground state of luminescence center is more important than in excited state.更多还原