Collisions inside subfemtoseconds laser pulses

1
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collisions inside subfemtosecond laser pulses L.
Kocbach1, L.B. Madsen2 and J.P. Hansen1 1
University of Bergen, Norway 2 University of
Århus, Denmark
2
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
The Nobel Prize in Chemistry 1999 The Royal
Swedish Academy of Sciences has awarded the 1999
Nobel Prize in Chemistry to Professor Ahmed H.
Zewail for his studies of transition states of
chemical reactions by femtosecond spectroscopy.
3
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
The Nobel Prize in Chemistry 1999 The Royal
Swedish Academy of Sciences has awarded the 1999
Nobel Prize in Chemistry to Professor Ahmed H.
Zewail for his studies of transition states of
chemical reactions by femtosecond
spectroscopy. Zewail's technique uses what can
be thought of as the world's fastest camera. The
"shutter speed" of such a camera must be
extremely high since molecules are very small
(about 10-9 m) and move extremely rapidly (1000
m/s). To obtain a sharp "image" of the molecules
in the course of a chemical reaction requires a
femtosecond (10-15 s) shutter speed.
4
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
5
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
6
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Few Cycles Light Pulses
7
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
8
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
9
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collision and laser pulse combined
10
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
11
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
12
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
13
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
14
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collision and laser pulse combined
15
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Schrödinger Equation
Combination of projectile-electron and
laser-electron interactions
Dipole Approximation
Quantal formulation
16
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Amplitude Equations
17
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collision and laser pulse combined
18
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
19
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collisions inside subfemtoseconds laser pulses
20
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
21
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
22
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
23
Collisions inside subfemtoseconds laser pulses
Collisions leading to ionization. One electron
is ejected as a result of the collision, the
laser pulse, or their combination Simulated in
CTMC CTMC Classical Trajectory Monte Carlo
model Newton equations are solved for hundreds of
thousands sets of initial conditions
24
Collisions inside subfemtoseconds laser pulses
Classical (CTMC) simulations of ionization in
collisions inside a short laser pulse
Laser only Collision only Combination
of both
25
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Laser pulse only
26
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Collision only
27
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Combination of both laser pulse and collision
28
Collisions inside subfemtoseconds laser pulses
Classical (CTMC) simulations of ionization
Laser only Collision only
Combination of both
29
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
Can this be detected?
30
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
COLTRIMS COLd Target Recoil Ion Momentum
Spectroscopy
PES Photon Emission spectroscopy
TES Translational Energy gain Spectroscopy
31
Collisions inside subfemtoseconds laser pulses
COLTRIMS COLd Target Recoil Ion Momentum
Spectroscopy
32
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
33
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
34
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002
35
Collisions inside subfemtoseconds laser pulses
Prague, November 4, 2002