AI Article Synopsis
- The study explores how terahertz fields of up to 100 kV/cm enhance photoacoustic emissions from a plasma created by lasers.
- It investigates the transfer of energy from terahertz radiation to molecular motion, focusing on how electron movement and collisions with molecules contribute to this process.
- The research shows that increased photoacoustic emissions in the frequency range of 1-140 kHz depend quadratically on the terahertz field and offers a method for detecting coherent terahertz waves using gases ionized by a two-color laser field.
Article Abstract
We report the study of enhanced photoacoustic emission from a laser-induced plasma under the influence of the terahertz field up to 100 kV/cm. We theoretically and experimentally investigate the energy transfer from terahertz radiation to molecular translational motion, through terahertz-field-driven electron motion and inelastic electron-molecule collision. The enhanced photoacoustic emission in the frequency range of 1-140 kHz is quadratically dependent on the incident terahertz field. We also demonstrate, as an application, that the enhancement of photoacoustic emission from gases asymmetrically ionized by two-color laser field can be used for coherent terahertz wave detection.
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| http://dx.doi.org/10.1103/PhysRevE.82.066602 | DOI Listing |
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