Figure 4: Temperature-dependent spectroscopy.
From: Nanoscale light–matter interactions in atomic cladding waveguides

Temperature dependence of the absorption. (a) Normalized transmission of the ACWG at different temperatures. (b) Transmission of the F=2→F′=2/3 85Rb transition as a function of temperature, and the expected theoretical contrast using Equation 1. The error bars were calculated by measuring the thermistors resistance fluctuation at every measured point and projecting this fluctuation on the calibration curve of the thermistor.