聚合物基质中二维光子气体的热化
Thermalization of a two-dimensional photon gas in a polymeric host matrix
摘要：
研究了填充染料的光学微腔中二维光子气体的热力学性质。光子气体的热平衡状态是通过辐射耦合到热浴来实现的，该热浴是在室温下用嵌入聚合物中的染料分子来实现的。气体的化学势可以自由调节。由两个曲面镜组成的光学微腔诱导了非零的有效光子质量和光子的谐波捕获势。虽然我们小组以前的实验使用液体染料溶液，但这里描述的测量是基于掺入聚合物基质中的染料分子。我们描述了染料掺杂聚合物的荧光性质的研究，并讨论了Kennard-Stepanov理论在该系统中的适用性。我们在固态微谐振器系统中观察到了一种热化的二维光子气体。在未来，基于染料的固态系统有望实现基于光子的玻色-爱因斯坦凝聚的热平衡中的单模光源，以及用于太阳能集中器。
英文摘要：
We investigate thermodynamic properties of a two-dimensional photon gas confined by a dye-filled optical microcavity. A thermally equilibrated state of the photon gas is achieved by radiative coupling to a heat bath that is realized with dye molecules embedded in a polymer at room temperature. The chemical potential of the gas is freely adjustable. The optical microcavity consisting of two curved mirrors induces both a non-vanishing effective photon mass and a harmonic trapping potential for the photons. While previous experiments of our group have used liquid dye solutions, the measurements described here are based on dye molecules incorporated into a polymer host matrix. We describe studies of fluorescence properties of dye-doped polymers, and discuss the applicability of Kennard-Stepanov theory in this system. We observe a thermalized two-dimensional photon gas in the solid state based microresonator system. In the future, dye-based solid state systems hold promise for the realization of single-mode light sources in thermal equilibrium based on Bose-Einstein condensation of photons, as well as for solar energy concentrators.
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