«After many observations of the double peak behaviour of the resonance crossing, and the absence of any single peak no matter how hard I looked, I then decided that this was a true physical effect, and had to decide which.»—Weisbuch discovering the polariton, Microcavities in École Polytechnique Fédérale de Lausanne, École Polytechnique (France) and elsewhere: past, present and future. C. Weisbuch and H. Benisty in Phys. Stat. Sol. B 242:2345 (2005).
Claude Weisbuch (1945‒) is a physicist who discovered experimentally polaritons, both those proposed by Hopfield[1] and, more impactfully and less-expectedly, those formed thanks to a cavity.[2]
There is also an artist named Claude Weisbuch, whose work can be seen for instance at the Staatliche Graphische Sammlung München in Munich.