Figure 5
From: Far-field characterization of the thermal dynamics in lasing microspheres
(a) Normalized experimental traces of the dynamic spectral shift (normalized temperature in the graph) obtained for microspheres of R = 20 μm (black dots) and R = 25 μm (green dots). Solid curves correspond to FEM simulations of the normalized thermal dynamics of the microsphere under different conditions. The red (blue) curve show the case of R = 20 μm (R = 25 μm) surrounded by air and leaning on the substrate. The cyan (orange) curve shows the case of R = 25 μm leaning on the substrate under vacuum (surrounded by moist air with no substrate). (b) Stationary temperature profile along the horizontal (black) and vertical (red) directions. The inset shows a 2D color scaled graph of the local temperature across a vertical plane passing through the sphere center. Both profiles have been normalized to the maximum temperature within the simulation volume, which is found at the north-pole of the microsphere (c) Bottom view of the stationary normalized heat flux across the microsphere surface (R = 25 μm). The contact point is highlighted with a cyan cross.
