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Photon Acceleration in a Flying Focus.
- Source :
-
Physical Review Letters . 9/20/2019, Vol. 123 Issue 12, p1-1. 1p. - Publication Year :
- 2019
-
Abstract
- A high-intensity laser pulse propagating through a medium triggers an ionization front that can accelerate and frequency upshift the photons of a second pulse. The maximum upshift is ultimately limited by the accelerated photons outpacing the ionization front or the ionizing pulse refracting from the plasma. Here, we apply the flying focus--a moving focal point resulting from a chirped laser pulse focused by a chromatic lens--to overcome these limitations. Theory and simulations demonstrate that the ionization front produced by a flying focus can frequency upshift an ultrashort optical pulse to the extreme ultraviolet over a centimeter of propagation. An analytic model of the upshift predicts that this scheme could be scaled to a novel tabletop source of spatially coherent x rays. [ABSTRACT FROM AUTHOR]
- Subjects :
- *X-rays
*PHOTONS
*LASER pulses
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 123
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 138788101
- Full Text :
- https://doi.org/10.1103/PhysRevLett.123.124801