Luminescence from Laser-Created Bubbles in Cryogenic Liquids

TL;DR

This study reports the observation of luminescence pulses from laser-created bubbles in cryogenic liquids, with significantly longer pulse durations than in water, indicating different physical phenomena at play.

Contribution

It is the first to document luminescence from bubbles in cryogenic liquids and highlights the distinct characteristics compared to water-based bubbles.

Findings

Luminescence observed at bubble collapse in cryogenic liquids.

Luminescence pulse duration is 100-1000 ns, much longer than in water.

Different physical mechanisms may be responsible in cryogenic liquids.

Abstract

A luminescence pulse has been observed from a laser-created bubble in liquid nitrogen and liquid argon at the first collapse point of the bubble. An unusual feature is that the width of the pulse is of order 100-1000 ns, much longer than the 2-8 ns pulses observed when the same experiment is carried out with a water sample.