Near-complete absorption of intense, ultrashort laser light by sub-lambda gratings.
Phys Rev Lett
; 101(14): 145001, 2008 Oct 03.
Article
in En
| MEDLINE
| ID: mdl-18851536
ABSTRACT
We demonstrate near-100% light absorption and increased x-ray emission from dense plasmas created on solid surfaces with a periodic sub-lambda structure. The efficacy of the structure-induced surface plasmon resonance, responsible for enhanced absorption, is directly tested at the highest intensities to date (3 x 10{15} W cm{-2}) via systematic, correlated measurements of absorption and x-ray emission. An analytical grating model as well as 2D particle-in-cell simulations conclusively explain our observations. Our study offers a definite, quantitative way forward for optimizing and understanding the absorption process.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2008
Document type:
Article
Affiliation country:
India