Report summary

Yale University Department of Applied Physics in 2021-2023 reads as a 22-PI network with 18 internal PI collaborations. The research center of gravity is Physics and Astronomy as the leading field (38% of slots across 16 PIs; 16 labels), Atomic and Molecular Physics, and Optics as the leading subfield (20% of slots across 11 PIs; 11 labels), and Advanced Fiber Laser Technologies as the leading topic (6% of slots across 4 PIs; 4 labels). Overall the pattern is balanced: there is enough structure to identify active groups, while the field mix still leaves room for multiple research identities. The most prominent PIs by weighted works are Hui Cao (30.9 weighted works; Random lasers and scattering media, Advanced Fiber Laser Technologies). The strongest pairings are Charles Ahn and F. J. Walker (15 shared works, weight 6.5). The strongest breakdown groups are group 1 with 7 PIs, 9 internal connections, weight 8.9, around Atomic and Molecular Physics, and Optics, Artificial Intelligence, Electrical and Electronic Engineering, led by Peter T. Rakich, Owen D. Miller, S. M. Girvin.