Attosecond
science
and
technology
have
emerged
as
a
promising
path
for
improving
our
understanding
of
light–matter
interaction.
High
harmonic
generation
based
light
sources
combine
high
photon
energy,
broad
spectrum,
short
duration
with
relatively
compact
implementation,
which
makes
them
flexible
tools
to
study
modify
physical
chemical
properties
matter
by
acting
directly
on
electronic
degrees
freedom.
Because
extreme
ultraviolet
radiation
interacts
primarily
outer
inner
valence
electrons,
it
finds
likely
applications
in
atomic,
molecular,
material
science.
Despite
their
spectacular
successes,
the
development
these
is
still
subject
intense
investigations,
searching
performances
terms
specifications
reliability.
In
this
perspective
article,
we
present
some
current
developments
sources,
well
related
quantum
attosecond
dynamics
atoms
molecules.
Photonics Research,
Год журнала:
2022,
Номер
10(10), С. 2309 - 2309
Опубликована: Авг. 2, 2022
Tailoring
the
properties
of
driving
laser
to
need
applications
often
requires
compromises
among
stability,
high
peak
and
average
power
levels,
pulse
duration,
spectral
bandwidth.
For
instance,
spectroscopy
with
optical
frequency
combs
in
extreme/visible
ultraviolet
region
a
near-IR
laser,
therefore
power,
duration
few
tens
fs,
maximal
available
Contrarily,
parametric
conversion
efficiency
is
higher
for
pulses
100-fs
range
due
temporal
walk-off
coating
limitations.
Here
we
suggest
an
approach
adjust
characteristics
high-power
chirped-pulse
amplification
(CPA)
requirements
different
nonlinear
converters
while
preserving
low-phase-noise
(PN)
system.
To
achieve
tunability,
installed
mechanical
shaper
free-space
section
stretcher
in-house-developed
ytterbium-fiber-based
CPA
The
system
delivers
100
W
at
repetition
rate
132.4
MHz.
While
gaining
control
over
properties,
preserve
relative-intensity-noise
PN
can
easily
be
adjusted
deliver
either
spectrum
ideal
mid-IR
light
generation
(full
width
half
maximum
∼11nm
,
compressed
230
fs)
or
highly
processes
such
as
high-harmonic
(
id="m2">
form="prefix">-
10dB
level
id="m3">
form="prefix">>
50
transform-limited
id="m4">
65fs
).
Optics Letters,
Год журнала:
2023,
Номер
48(18), С. 4753 - 4753
Опубликована: Авг. 18, 2023
Advancing
ultrafast
high-repetition-rate
lasers
to
shortest
pulse
durations
comprising
only
a
few
optical
cycles
while
pushing
their
energy
into
the
multi-millijoule
regime
opens
route
toward
terawatt-class
peak
powers
at
unprecedented
average
power.
We
explore
this
via
efficient
post-compression
of
high-energy
1.2
ps
pulses
from
an
ytterbium
InnoSlab
laser
9.6
fs
duration
using
gas-filled
multi-pass
cells
(MPCs)
repetition
rate
1
kHz.
Employing
dual-stage
compression
with
second
MPC
stage
supporting
close-to-octave-spanning
bandwidth
enabled
by
dispersion-matched
dielectric
mirrors,
record
factor
125
is
reached
70%
overall
efficiency,
delivering
6.7
mJ
power
∼0.3
TW.
Moreover,
we
show
that
can
improve
temporal
contrast
multi-picosecond
delay
least
one
order
magnitude.
Our
results
demonstrate
conversion
picosecond
high-peak-power
few-cycle
sources,
prospectively
opening
up
new
parameter
regimes
for
plasma
physics,
high
biomedicine,
and
attosecond
science.
International journal of mechanical system dynamics,
Год журнала:
2023,
Номер
3(3), С. 192 - 212
Опубликована: Сен. 1, 2023
Abstract
Microscale
charge
and
energy
transfer
is
an
ultrafast
process
that
can
determine
the
photoelectrochemical
performance
of
devices.
However,
nonlinear
nonequilibrium
properties
hinder
our
understanding
processes;
thus,
direct
imaging
strategy
has
become
effective
means
to
uncover
processes.
Due
diffraction
limits
optical
imaging,
obtained
image
insufficient
spatial
resolution.
Therefore,
electron
beam
combined
with
a
pulse
laser
showing
high
spatial–temporal
resolution
popular
area
research,
numerous
breakthroughs
have
been
achieved
in
recent
years.
In
this
review,
we
cover
three
typical
techniques,
namely,
time‐resolved
photoemission
microscopy,
scanning
transmission
addition
principles
characteristics
these
techniques.
Some
outstanding
results
related
photon–electron
interactions,
carrier
transport
relaxation,
electron–lattice
coupling,
lattice
oscillation
are
also
reviewed.
summary,
multidimensional
abilities
promote
fundamental
physics,
chemistry,
optics,
as
well
guide
development
advanced
semiconductors
electronics.
Applied Physics Express,
Год журнала:
2024,
Номер
17(4), С. 042006 - 042006
Опубликована: Апрель 1, 2024
Abstract
We
demonstrate
the
generation
of
sub-two-cycle
intense
laser
pulses
based
on
two-stage
hollow-core
fiber
(HCF)
compression
in
a
compact
setup
(footprint
0.65
m
×
2.85
m)
using
commercial
Yb:KGW
regenerative
amplifier.
Spectrally
broadened
with
an
output
power
7.2
W
from
second
HCF
stage
are
compressed
down
to
6.6
fs
(1.9
cycles
at
1030
nm)
pair
chirp
mirrors
and
wedges
efficiency
86%,
leading
6.2
W.
A
pulse-to-pulse
energy
stability
0.17%
is
measured
for
10
min.
Attosecond
science
and
technology
have
emerged
as
a
promising
path
for
improving
our
understanding
of
light–matter
interaction.
High
harmonic
generation
based
light
sources
combine
high
photon
energy,
broad
spectrum,
short
duration
with
relatively
compact
implementation,
which
makes
them
flexible
tools
to
study
modify
physical
chemical
properties
matter
by
acting
directly
on
electronic
degrees
freedom.
Because
extreme
ultraviolet
radiation
interacts
primarily
outer
inner
valence
electrons,
it
finds
likely
applications
in
atomic,
molecular,
material
science.
Despite
their
spectacular
successes,
the
development
these
is
still
subject
intense
investigations,
searching
performances
terms
specifications
reliability.
In
this
perspective
article,
we
present
some
current
developments
sources,
well
related
quantum
attosecond
dynamics
atoms
molecules.
