Report summary

The 2018-2020 picture for The Ohio State University Department of Physics is a 39-PI network with 33 internal PI collaborations. The research center of gravity is Physics and Astronomy as the leading field (37% of slots across 27 PIs; 27 labels), Atomic and Molecular Physics, and Optics as the leading subfield (18% of slots across 16 PIs; 16 labels), and Advanced Fiber Laser Technologies as the leading topic (3% of slots across 4 PIs; 4 labels). This is a solid, readable collaboration map: group-level fit matters more than a single department-wide label. The top weighted PIs are Enam Chowdhury (16 weighted works; Laser-Matter Interactions and Applications, Advanced Fiber Laser Technologies). The strongest pairings are P. C. Hammel and Fengyuan Yang (8 shared works, weight 4.4). The standout breakdown groups are group 1 with 6 PIs, 6 internal connections, weight 6.9, around Materials Chemistry, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, led by L. J. Brillson, Roland Kawakami, Yuan-Ming Lu; group 2 with 5 PIs, 4 internal connections, weight 6, around Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials, led by Fengyuan Yang, Louis F. DiMauro, P. C. Hammel.