Extended Data Fig. 4: Schematic of the μ-PL characterization set-up.
From: Gain-induced topological response via tailored long-range interactions
The microrings are pumped by a pulsed laser (15 ns pulse width, 290 kHz repetition rate). The pump beam is focused onto the sample with a 10× objective, this objective in turns also collects the emission from the samples. Light is then either directed to a linear array detector for spectral measurements or to an IR camera for intensity profile observation.
