Imaging electron motion with attosecond time resolution
Imaging electron motion with attosecond time resolution
Imaging electron motion with attosecond time resolution
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Why not energy domain - photoabsorption<br />
∆t = 100 <strong>attosecond</strong>, ∆E·∆t = ħ /2 ⇒<br />
∆E = 6.58 eV<br />
grating<br />
slit<br />
counter<br />
lamp<br />
specimen<br />
I( ω)<br />
= exp[ −µ ( ω)<br />
L]<br />
µ ( ω)<br />
⇒ ε(<br />
ω)<br />
ε(<br />
ω)<br />
−1<br />
χ<br />
e(<br />
ω)<br />
=<br />
4π<br />
P( ω)<br />
= χ ( ω)<br />
E(<br />
ω)<br />
e<br />
P(t)<br />
E(t)<br />
∫ ∞ −∞<br />
P( t)<br />
= dt′<br />
χ ( t − t′<br />
) ( t′<br />
e<br />
E )<br />
t 0<br />
<strong>time</strong> (as!)<br />
“…energy-domain measurements on their own are – in general – unable to provide detailed insight<br />
into the evolution of multi-<strong>electron</strong> dynamics.” – M. Drescher, et. al., Nature (2002)