Sonoluminescence

Sonoluminescence refers to the light emission observed during the ultrasound-driven collapse of microbubbles . The presence of bubble clouds or multiple bubbles means that there is a group of bubbles or a steady-state bubble population that undergo collapse within an acoustic cycle leading to SL. The SL that is emitted from a multibubble field is referred to as MBSL. Under specific experimental conditions, it is possible to avoid the formation of a bubble field and acoustically levitate a stable, single bubble in a liquid. In this case, the bubble grows and collapses within one acoustic cycle. SL emission occurs in every acoustic cycle, which is referred to as SBSL.