From laser ultrasonics to optical manipulation.
Optics Express
|April 4, 2015
Summary
Laser pulses impart momentum to solids, causing propulsion via elastic waves. This study explores 1D elastodynamics, detailing wave generation in ablation and radiation pressure regimes.
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- Laser-matter interaction transfers momentum to solid objects, resulting in propulsion.
- Propulsion is mediated by elastic waves, including ablation-induced, light-pressure-induced, and thermoelastic waves.
- Understanding the dynamics of these waves is crucial for applications in optical manipulation.
Purpose of the Study:
- To describe the one-dimensional (1D) elastodynamics of pulsed optical manipulation.
- To experimentally observe and analyze elastic waves generated under different laser interaction regimes.
Main Methods:
- Theoretical description of 1D elastodynamics for laser-induced propulsion.
- Experimental investigation of elastic wave generation in confined ablation.
- Experimental investigation of elastic wave generation in the radiation pressure regime.
Main Results:
- Demonstrated that laser pulses induce momentum transfer and propulsion in solid objects.
- Observed distinct elastic wave behaviors in both confined ablation and radiation pressure regimes.
- Highlighted the presence of thermoelastic waves accompanying mechanical waves.
Conclusions:
- The study provides a framework for understanding 1D elastodynamics in pulsed optical manipulation.
- Experimental results confirm the generation and propagation of elastic waves under different laser regimes.
- Elastic waves, including thermoelastic waves, play a significant role in laser-induced propulsion.
