| Optical dynamics in a deformed microcavity is strongly depend on its surface shape. In experiments, especially with the liquid microjet cavity whose surface is extremely clear that it supports high Q modes and, it is essential to deternine accurate surface profile of a sample cavity for comparing results with the thoery. However, the rigorous analysis of the surface motion of the cylindrical liquid volume is always complicated because of the nonlinear nature of the Navier-Stokes equation. We have developed a full 360°surface profile reconstruction technique with nondestructive lateral images. With it, we measured the amplitude of the surface oscillation of the liquid jet. The resulting data clearly shows the effects from the nonlinearity, and we found that it agrees best with Niels Bohr's 2-dimensional calculation developed at his early scientific career. |
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