To induce LC radial alignment, PDMS 3D microscaffolds consis�ng of a cylindrical cavity were fabricated (Figure ). Following the same procedure as before, LC cells were prepared and the E7 mixture was subsequently infiltrated to inves�gate the effect of geometry in the alignment (Figure ). It should be noted that in the design of these 3D microscaffolds, "microtrench" features were implemented. The introduc�on of these features in the geometry design is two-fold: i) to effec�vely reduce the interfacial tension between the PDMS bulk and the substrate and to prevent detachment during the solventwashing process and ii) to facilitate the successful infiltra�on of LC into the confined cavi�es, as shown as the cross paterns along the X-and Y-axis in the POM images (Figure ). The concentric LC topography observed by POM inside the microscaffolds suggested the forma�on of a radial domain, further confirmed by the simulated director field. Analogous to the planar case, primarily radial alignment is observed for narrower cylindrical wells, whereas larger cylinders result in the coexistence of radial alignment near the walls and z-alignment at the center. The later results in high op�cal ex�nc�on at the center, observed in POM and confirmed by the simulated op�cal experiment.