The super-luminescent light emitting diode (SLED) emits a broadband optical signal of wavelength (λ) centered around 1550 nm into the input optical fiber. The input signal passes through a polarization controller to match the polarization of the signal to the transverse-electric mode supported by the on-chip grating couplers and waveguides. The chip contains slot waveguide micro-ring resonators as shown in the scanning-electron micrograph (SEM) in Figure . The base heater controls the temperature (T) of the chip. The output signal is collected by the optical fiber and fed into the optical spectrum analyzer (OSA) to record the optical transmission spectrum. Figure shows the transmission spectra of a slot waveguide MRR without bistable molecule (1) and with the bistable molecule (1) at different temperature (T). The bare slot waveguide MRR does not show any observable resonance because the rate at which light is coupled into the resonator is significantly larger than the rate at which the resonator loses light by absorption and scattering (known as the over-coupled condition). The MRR with 1 shows three optical resonances in the range of λ = 1555 nm -1570 nm indicating non-zero optical absorption by 1 around λ = 1550 nm that takes the MRR out of the over-coupled condition. We observe that the transmission spectrum shifts to shorter Fig. Variation of 𝑄 and 0 with T: 𝑄 decreases and 0 blue-shifts with increase in T.