Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 15, 2024
Abstract
The
recent
discovery
that
linearly
polarized
light
with
a
helical
wavefront
can
exhibit
vortex
dichroism
(also
referred
to
as
dichroism)
has
opened
up
new
horizons
in
chiroptical
spectroscopy
structured
chiral
light.
Recent
experiments
have
now
pushed
optical
activity
beams
into
the
regime
of
nonlinear
optics.
Here
theory
two‐photon
absorption
(TPA)
focused
vortices
by
molecules:
(NVD)
is
presented.
It
discovered
highly
distinct
features
arise
case
TPA
beams,
including
ability
probe
molecular
structure
not
accessible
current
methods
and
differential
rate
significantly
influenced
orientation
state
linear
polarization.
This
study
provides
strong
evidence
combining
improved
routes
studying
chirality.
Optics Letters,
Год журнала:
2024,
Номер
49(14), С. 3890 - 3890
Опубликована: Июнь 21, 2024
Chiral
optical
beams
that
carry
orbital
angular
momentum
(OAM)
have
a
broad
range
of
applications
such
as
tweezers,
chiral
microstructure
fabrication,
and
communications.
However,
some
inhomogeneous
intensity
distribution
limits
the
application
in
these
fields.
In
this
Letter,
two
different
types
fields
with
uniform
arbitrary
length
were
proposed
based
on
amplitude
encoding
method
multifocal
synthesis.
The
is
determined
by
distance
between
focal
points
can
greatly
extend
modulation
field.
Moreover,
since
each
point
contains
modulable
phase,
an
interception
field
be
realized
selectively
retaining
part
points.
By
partitioning
assigning
topological
charges,
OAM
space-division
multiplexing
independent
tunability
charges
realized.
addition,
composite
multi-petal
vortex
array
formed
combining
enhance
information
capacity
communications
may
potential
particle
manipulation.
Photonics,
Год журнала:
2024,
Номер
11(10), С. 962 - 962
Опубликована: Окт. 14, 2024
This
paper
presents
a
novel
method
for
generating
and
shaping
reverse
energy
flow
through
the
interference
of
light
fields
from
minimal
number
point
sources.
Until
now,
has
only
been
observed
using
complex
fields,
such
as
optical
vortices
or
cylindrical
vector
beams,
limiting
formation
near
axis.
We
demonstrate
both
analytically
numerically
that
unbounded
regions
can
be
achieved
with
just
two
sources,
positioned
asymmetrically
at
specific
angles
(e.g.,
90
45
degrees)
particular
polarization
states.
The
results
indicate
relative
enhanced
by
increasing
sources
to
three
four,
adjusting
their
polarization,
introducing
vortex
phase
singularity.
presence
an
initially
embedded
asymmetry
in
under
consideration
leads
non-uniform
distribution
spin
orbital
angular
momentum
density.
Variations
state,
well
introduction
singularity,
allow
changing
density
while
maintaining
flow.
also
explore
feasibility
implementing
obtained
sectional
diffractive
elements,
which
will
enhance
efficiency
generated
compared
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 15, 2024
Abstract
The
recent
discovery
that
linearly
polarized
light
with
a
helical
wavefront
can
exhibit
vortex
dichroism
(also
referred
to
as
dichroism)
has
opened
up
new
horizons
in
chiroptical
spectroscopy
structured
chiral
light.
Recent
experiments
have
now
pushed
optical
activity
beams
into
the
regime
of
nonlinear
optics.
Here
theory
two‐photon
absorption
(TPA)
focused
vortices
by
molecules:
(NVD)
is
presented.
It
discovered
highly
distinct
features
arise
case
TPA
beams,
including
ability
probe
molecular
structure
not
accessible
current
methods
and
differential
rate
significantly
influenced
orientation
state
linear
polarization.
This
study
provides
strong
evidence
combining
improved
routes
studying
chirality.
