The momentum-dependent orbital character in crystalline solids, referred to as orbital texture, is of capital importance in the emergence of symmetry-broken collective phases, such as charge density waves as well as superconducting and topological states of matter. By performing extreme ultraviolet multidimensional angle-resolved photoemission spectroscopy for two different crystal orientations linked to each other by mirror symmetry, we isolate and identify the role of orbital texture in photoemission from the transition metal dichalcogenide 1T-TiTe₂. By comparing our experimental results with theoretical calculations based on both a quantitative one-step model of photoemission and an intuitive tight-binding model, we unambiguously demonstrate the link between the momentum-dependent orbital orientation and the emergence of strong intrinsic linear dichroism in the photoelectron angular distributions. Our results represent an important step towards going beyond band structure (eigenvalues) mapping and learning about electronic wavefunction and orbital texture of solids by exploiting matrix element effects in photoemission spectroscopy.

晶体固体中动量相关的轨道特征，称为轨道纹理，在对称性破坏的集体相（例如电荷密度波以及物质的超导和拓扑状态）的出现中具有重要意义。通过对通过镜像对称性相互关联的两个不同晶体取向进行极紫外多维角分辨光发射光谱，我们从过渡金属二硫属化物 1T-TiTe _{2 中}分离并确定轨道纹理在光发射中的作用. 通过将我们的实验结果与基于光发射定量一步模型和直观紧束缚模型的理论计算进行比较，我们明确地证明了动量相关轨道取向与光电子中强本征线性二色性的出现之间的联系。角分布。我们的结果代表了通过利用光发射光谱中的基质元素效应来超越能带结构（特征值）映射和学习固体的电子波函数和轨道纹理的重要一步。