Fig. 2: Simulated transient response of self-evolving photonic crystals.
From: Self-evolving photonic crystals for ultrafast photonics
a Simulation model of a self-evolving photonic crystal with 1-mm-diameter current injection. b, c Transient response without and with band-edge frequency gradation. A constant injection current of 20 A is used in the simulation. d Enlarged view of a single pulse in c. e Carrier-density distributions, band-edge frequency distributions, and photon density distributions at four different timings (i)–(iv) in d. Dashed lines in panels (ii)–(iv) show the distributions at the initial stage of lasing (i).
