Fig. 1: Concept of temporal scattering as open-system responses.
From: Unidirectional scattering with spatial homogeneity using correlated photonic time disorder
a,b, Schematics of temporal and spatial Green’s functions: Re[G(t; t′)e+ikz] (a) and Re[G(z; z′)e−iωt] (b). Shaded lines in a and b indicate the evolution of each Green’s function. c, Schematic of system modulation by signal power Pin(t) from the environment, representing the system gain and loss for positive and negative Pin, respectively. d, Energy alteration from light–matter interactions with the time disorder driven by Pin(t) in c. ε(t) (grey area) and uEM0(t) (purple line) are the time-varying permittivity confined inside the temporal range [0, T] and the instantaneous electromagnetic energy density, respectively.
