Fig. 5: Experimental results for a sensor coupled to two bubbles.
From: Coupling the thermal acoustic modes of a bubble to an optomechanical sensor
Power spectral density plots for the same sensor in air (black, gently smoothed) and encapsulated by the larger bubble with the smaller tethered bubble nearby (red, not smoothed). The vertical dashed lines indicate numerically predicted eigen-frequencies for the lowest-order volume acoustic modes of the larger bubble but without accounting for the neighboring small bubble. The inset shows a top-down-view microscope image of the bubble pair and surrounding sensors (scale bar—100 µm)
