The versatility of quantum gas experiments greatly benefits from the ability to apply variable potentials. Here we describe a method which allows the preparation of potential structures for microcavity photons via spatially selective deformation of optical resonator geometries with a heat-induced mirror surface microstructuring technique. We investigate the thermalization of a two-dimensional photon gas in a dye-filled microcavity composed of the custom surface-structured mirrors at wavelength-scale separation. Specifically, we describe measurements of the spatial redistribution of thermal photons in a coupled double-ridge structure, where photons form a Bose-Einstein condensate in a spatially split ground state, as a function of different pumping geometries.

中文翻译：

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通过直接激光写入镜面轮廓实现对光的任意捕获势

量子气体实验的多功能性极大地受益于施加可变电势的能力。在这里，我们描述了一种方法，该方法允许通过使用热感应镜表面微结构化技术对光学谐振腔几何形状进行空间选择性变形来准备微腔光子的潜在结构。我们研究了二维光子气体在染料填充的微腔中的热化，该腔由波长范围分离的定制表面结构化反射镜组成。具体来说，我们描述了耦合双脊结构中热光子的空间再分布的测量，其中光子在空间分裂的基态下形成Bose-Einstein冷凝物，这是不同泵浦几何形状的函数。