Optics Express,
Год журнала:
2024,
Номер
32(21), С. 36646 - 36646
Опубликована: Сен. 16, 2024
Terahertz
wave
sources
are
essential
for
the
development
of
terahertz
technology.
A
radiation
source
based
on
dielectric
gratings
driven
by
free
electrons
is
proposed
in
this
paper.
Electrons
emitted
emitter
excite
spoof
surface
plasmons
(SSPs)
when
passing
above
structure.
Simulation
results
demonstrate
that
enhance
field
intensity
and
electron-structure
interaction
compared
with
metal
gratings.
Additionally,
different
materials
can
be
utilized
to
offer
greater
flexibility
adjusting
characteristics
while
keeping
structure
simple
manufacturable.
The
use
reduces
ohmic
loss
band.
supports
on-chip
integration,
offering
a
new
approach
developing
efficient
compact
electron
sources.
Nanophotonics,
Год журнала:
2025,
Номер
14(8), С. 1203 - 1211
Опубликована: Фев. 7, 2025
Abstract
High
resolution
imaging
represents
a
relentless
pursuit
within
the
field
of
optical
system.
Multi-frame
super-resolution
(SR)
is
an
effective
method
for
enhancing
sampling
density,
while
it
heavily
relies
on
sub-pixel
scale
displacement
bulky
camera.
Based
symmetric
transformation
quadratic-phase
metasurface,
we
propose
scaled
transverse
translation
(STT)
utilizing
planar
elements
(POEs)
to
facilitate
and
remote
imaging.
The
STT
module
composed
pair
with
conjugated
quadratic
phase
profile
fabricated
experimentally
verified.
By
displacing
POE
millimeter-level
range,
achieve
sub-micron
in
shift
accuracy.
Furthermore,
results
SR
enhanced
Fourier
ptychography
demonstrate
significant
compatibility
effectiveness
this
module.
improvement
FP
increases
from
2×
2.8×
by
using
Moreover,
defect
reduction
contrast
enhancement
are
obtained.
With
its
advantages
light-weight,
simple
structure
ease
implementation,
shows
considerable
potential
numerous
applications.
ACS Photonics,
Год журнала:
2024,
Номер
11(8), С. 3105 - 3111
Опубликована: Июль 31, 2024
Orbital
angular
momentum
(OAM)
holographic
technology
has
made
advancements
in
the
field
of
optical
information
encryption.
In
order
to
further
enhance
security
capabilities
and
encryption
quality,
this
paper
proposes
an
technique
based
on
a
chiral
vortex
beam.
Four
keys
are
implemented,
shared
key
is
introduced
by
using
multiplexing
multichiral
beam,
which
extends
application
range
OAM
A
coding
method
discrete
displacement
phase
modulation
proposed,
enabling
pattern
separation
spatial
distribution
original
information.
This
achieves
high-quality
reconstruction
high
signal-to-noise
ratio
signal.
Experimental
results
indicate
that
multimode
significant
advantages
terms
Nano Letters,
Год журнала:
2024,
Номер
24(28), С. 8679 - 8686
Опубликована: Июль 1, 2024
The
simultaneous
detection
of
the
orbital
angular
momentum
(OAM)
and
wavelength
offers
new
opportunities
for
optical
multiplexing.
However,
because
dispersion
lens
functions
Fourier
transformation,
mode
conversions
at
distinct
wavelengths
cannot
be
achieved
in
same
plane.
Here
we
propose
an
ultracompact
achromatic
complementary
metal
oxide
semiconductor
(CMOS)-integrated
OAM
detector.
Specifically,
a
spatial
multiplexed
scheme,
randomly
interleaving
phase
distributions
distributing
superposed
modes
into
preset
positions
wavelengths,
is
presented.
In
addition,
such
nanoprinted
detector
featuring
microscale
size
short
focal
length
can
integrated
onto
CMOS
chip.
Consequently,
four-bit
incident
light
beams
three
discrete
(633,
532,
488
nm)
distinguished
with
high
degree
accuracy
evaluated
by
average
standardized
Euclidean
distance
∼0.75
between
analytical
target
results.
Our
results
showcase
miniaturized
platform
achieving
high-capacity
information
processing.
Photonics,
Год журнала:
2025,
Номер
12(2), С. 125 - 125
Опубликована: Янв. 31, 2025
An
optical
vortex
(OV)
beam
is
an
important
type
of
spatially
structured
beam.
However,
the
diffraction
limit
for
light
with
orbital
angular
momentum
(OAM)
remains
a
challenge
certain
applications.
Surface
plasmon
polaritons
(SPPs)
can
confine
to
nanoscale
dimensions
and
enhance
light–matter
interactions.
Over
past
two
decades,
researchers
have
begun
explore
imparting
OAM
onto
SPPs
generate
plasmonic
vortices
(PVs).
Since
discovery
PVs,
significant
efforts
been
made
in
this
field,
leading
considerable
progress.
This
article
reviews
these
studies
three
key
areas:
(a)
generation
manipulation
(b)
characterization
(c)
application
PVs.
We
believe
that
PVs
represent
promising
tool
utilizing
both
fundamental
research
practical
applications
hold
great
potential
future
continued
dedicated
efforts.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 26, 2025
Abstract
In
this
study,
a
phase
of
metasurface
is
proposed
based
on
rotational
ring
configuration,
whose
tuning
principle
associated
with
its
conversion
between
spin
angular
and
orbital
momentum.
The
focusing
vortex
beams
could
be
obtained
steerable
focal
plane.
spin‐selection
mechanisms
shifting
process
depend
the
corresponding
momentums.
To
promote
practical
application,
relationships
mechanical
performance,
i.e.,
limited
circumvolution
angle
optical
properties
including
range
length
momentum
are
analyzed
discussed,
indicating
that
demand
implementation
would
lower
by
increasing
converted
sparse
aperture
then
demonstrated
as
an
effective
solution
to
implement
involved
high
This
work
will
pave
way
for
designing
tunable
facilitating
their
applications
in
areas
manipulation
vortex‐based
communication.
Results in Physics,
Год журнала:
2024,
Номер
61, С. 107745 - 107745
Опубликована: Май 9, 2024
We
show
coherent
photons
with
spin
and
orbital
angular
momentum
have
symmetry
of
special
unitary
group
degree
four,
SU(4),
both
theoretically
experimentally.
the
polarisation
could
be
a
measure
to
characterise
quantum
coherency
state,
which
was
significantly
affected
by
partial
trace
out
freedom.
By
changing
amplitudes
classically
entangled
we
observed
crossover
from
Heisenberg
classical
Ising
spin.
also
demonstrated
projections
states,
recover
while
SU(4)
state
is
projected
simple
product
SU(2)×SU(2).
Based
on
developed
platform,
explored
texture
photons,
found
unique
profile
reminiscent
Bengal
cat
upon
wrapping
three-dimensional
sphere.
controlled
phase
between
singlet
triplet
states
rotated
increasing
phase.
