Fig. 1: Spatial vs temporal boundaries and corresponding sources. | Light: Science & Applications

Fig. 1: Spatial vs temporal boundaries and corresponding sources.

From: Electrodynamics of photonic temporal interfaces

Fig. 1

a, b Spatial and (c, d) temporal interfaces, represented as (a, c) transmission lines with abruptly varying capacitance per unit length and (b, d) materials with abruptly varying permittivity. Dual to the way surface currents at a spatial interface may cause a discontinuity in the tangential magnetic field H, interface charges at a temporal interface can induce a discontinuity in the displacement field D

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