SwePub
Sök i LIBRIS databas

  Utökad sökning

onr:"swepub:oai:lup.lub.lu.se:9087fd23-3bba-4488-ab69-d0d7e0785429"
 

Sökning: onr:"swepub:oai:lup.lub.lu.se:9087fd23-3bba-4488-ab69-d0d7e0785429" > Influence of atomic...

Influence of atomic density in high-order harmonic generation

Altucci, C (författare)
Starczewski, Tomas (författare)
Mevel, E (författare)
visa fler...
Wahlström, Claes-Göran, (författare)
Lunds universitet, Lund University, Naturvetenskapliga fakulteten, Faculty of Science, Fysiska institutionen, Department of Physics, Atomfysik, Atomic Physics
Carre, B (författare)
L'Huillier, Anne, (författare)
Lunds universitet, Lund University, Naturvetenskapliga fakulteten, Faculty of Science, Fysiska institutionen, Department of Physics, Atomfysik, Atomic Physics
visa färre...
Lunds universitet Atomfysik. (creator_code:org_t)
1996
Engelska.
Ingår i: Optical Society of America. Journal B: Optical Physics. - Optical Society of America. - 0740-3224. ; 13:1, s. 148-156
Läs hela texten (fulltext)
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • We have investigated how high-order harmonics generated in rare gases depend on the atomic density. The peak and the profile of the atomic density in the interaction region were measured as a function of the backing pressure and the distance from the nozzle by a differential interferometry technique, The conversion efficiency for the harmonics in the plateau was found to increase approximately quadratically over the entire range of peak pressures investigated (3-80 mbar). The intensity of the harmonics in the cutoff region, in contrast, increased only until an optimum peak pressure was reached, beyond which it decreased. This optimum peak pressure was found to be dependent on both the laser intensity and the process order. To understand this effect, we have performed extensive propagation calculations of both the fundamental and the harmonic fields, using ionization rates and dipole moments from a tunnel ionization model. We obtained good agreement with the experimental results. The observed effect is attributed to ionization-induced defocusing of the fundamental laser beam, which reduces the peak intensity obtained in the medium and shortens the extent of the plateau. (C) 1996 Optical Society of America

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Publikations- och innehållstyp

art (ämneskategori)
ref (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy