Steven Glenn Johnson (born 1973)[2] is an American applied mathematician and physicist known for being a co-creator of the FFTW[3][4][5] library for software-based fast Fourier transforms and for his work on photonic crystals. He is professor of Applied Mathematics and Physics at MIT where he leads a group on Nanostructures and Computation.[6]
He is the author of the NLOpt library for nonlinear optimization,[10] as well as being the co-author of the open-source electromagnetic softwares Meep[11] and MPB.[12] He is a frequent contributor to the Julia programming language, and has also contributed to Python, R, and Matlab. He was a keynote speaker for the 2019 JuliaCon conference.[13]
^Johnson SG, Frigo M (September 2008). "ch.11: Implementing FFTs in practice". In C. S. Burrus (ed.). Fast Fourier Transforms. Houston TX: Connexions: Rice University.
^Johnson, Steven G.; Joannopoulos, J. D. (2001). "Block-iterative frequency-domain methods for Maxwell's equations in a planewave basis". Optics Express. 8 (3): 173–190. doi:10.1364/OE.8.000173.