Guimarães focuses on the interplay between charge, spin/magnetism, and light in atomically-thin materials. His group explores the control over spin-orbit torques for the manipulation of magnetization and uses ultrafast magneto-optical techniques to study the behavior of spins and magnetism in low-dimensional structures. He pioneered the control of spin-orbit torques using low-symmetry two-dimensional materials and the demonstration of optically- generated spins in inversion symmetric van der Waals systems. He received the NWO Rubicon, Veni, and Start-Up grants, a Kavli Institute Fellowship, and an ERC Starting Grant. Guimarães is also part of the Young Academy Groningen.