水介质中冷布朗运动的反斯托克斯光致发光研究
Cold Brownian motion in aqueous media via anti-Stokes photoluminescence
摘要：
低温科学的进步使人们能够观察到新的低温物理现象，包括超导性、超流性和玻色-爱因斯坦凝聚体。传热在许多应用中也至关重要，包括集成微电子中的热管理和植物生长发育的调节。在这里，我们表明，单光束激光捕获可以用来诱导和量化的本地制冷的水介质通过分析的冷布朗动力学的个别Yb 3+掺杂的氟化钇锂（YLF）晶体在一个不均匀的温度场通过前向光散射和后焦平面干涉。使用可调谐的NIR连续波激光器以1 MW/cm 2量级的辐照度光学捕获各个YLF晶体。通过光学声子吸收介导的Yb 3+激发态的上转换，通过反斯托克斯光致发光将热传输出晶格（穿过固/液界面）。单个YLF晶体的冷布朗运动（CBM）分析表明，在环境条件下局部冷却>21 ℃，这表明了一系列潜在的未来应用。
英文摘要：
Advances in cryogenic sciences have enabled several observations of new low-temperature physical phenomena including superconductivity, superfluidity, and Bose-Einstein condensates. Heat transfer is also critical in numerous applications including thermal management within integrated microelectronics and the regulation of plant-growth and development. Here we demonstrate that single-beam laser-trapping can be used to induce and quantify the local refrigeration of aqueous media through analysis of the cold Brownian dynamics of individual Yb3+-doped yttrium lithium fluoride (YLF) crystals in an inhomogeneous temperature field via forward light scattering and back-focal-plane interferometry. A tunable, NIR continuous-wave laser is used to optically trap individual YLF crystals with an irradiance on the order of 1 MW/cm2. Heat is transported out of the crystal lattice (across the solid / liquid interface) by anti-Stokes photoluminescence following upconversion of Yb3+ excited states mediated by optical-phonon absorption. The cold Brownian motion (CBM) analysis of individual YLF crystals indicates local cooling by >21 C below ambient conditions suggesting a range of potential future applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
