Fig. 3: Synchronization phase.
From: Photonic metamaterial analogue of a continuous time crystal
a, Time domain trace of a single transmissivity oscillation burst (orange line) overlayed on a trace showing the time dependence of incident laser power (in the 20% modulation regime, dashed black line). a.u., arbitrary units. b, Imaginary versus real part of spectral amplitude (A) at 855 kHz, the frequency at which an SSS is achieved, from the Fourier spectra of 155 consecutive bursts of transmissivity oscillation over intervals equal to the period of incident light intensity modulation, as illustrated in Fig. 3a. Incident light intensity is modulated at 560 Hz.
