Fig. 2: Optical bistability in EIT-AT transmission spectra.
From: Microwave-coupled optical bistability in driven and interacting Rydberg gases

a Transmission spectrum with the microwave frequency blue detuning of 90 MHz. b Transmission spectrum with the microwave frequency red detuning of 240 MHz. c Color map showing the transmission difference of AT splitting when the microwave frequency is red-detuned by 300 MHz.