Abstract
In
the
field
of
optical
communications
and
quantum
informatics,
polarization
orbital
angular
momentum
(OAM)
offer
a
promising
way
to
expand
dimension
information.
However,
detecting
state
topological
charge
OAM
beam
on‐chip
can
be
challenging.
To
address
this,
an
ultracompact
metasurface
is
proposed
demonstrated.
The
composed
six
polarization‐sensitive
metalenses
that
occupy
60°annular
sectors
each
are
capable
simultaneous
detection.
focuses
coaxial
polarized
vortex
into
locations,
foci
displacement
related
value
charge.
corresponding
obtained
through
reconstructed
Stokes
parameter
using
focus
light
intensities.
For
proof‐of‐concept,
operating
at
wavelength
1064
nm
fabricated,
which
exhibits
exceptional
recognition
ability.
possesses
merits
ultra‐compact
size
simultaneously
entire
identification
capability,
may
encourage
development
communication
systems.
Opto-Electronic Advances,
Journal Year:
2024,
Volume and Issue:
7(8), P. 240095 - 240095
Published: Jan. 1, 2024
Based
on
the
principle
of
super-symmetric
lens
with
quadratic
phase
gradient
transformation,
combined
digital
coding
metasurface,
we
propose
a
wide-angle
coded
metalens
for
focusing
control
in
two-dimensional
space.
This
achieves
focus
shift
x-direction
by
changing
oblique
incidence
angle
incident
wave,
and
y-direction
combining
convolution
digitally
metasurface
to
achieve
flexible
light
plane.
The
unit
is
mainly
composed
three-layer
metal
structure
two
layers
medium,
transmission
obtained
middle
layer
structure,
which
turn
obtains
required
distribution
metalens.
design
realizes
function
large
viewing
at
x-polarized
incidence,
control.
Experimentally,
prepared
designed
tested
experimental
results
are
good
agreement
results.
Opto-Electronic Science,
Journal Year:
2023,
Volume and Issue:
2(11), P. 230037 - 230037
Published: Jan. 1, 2023
Super-resolution
(SR)
microscopy
has
dramatically
enhanced
our
understanding
of
biological
processes.
However,
scattering
media
in
thick
specimens
severely
limits
the
spatial
resolution,
often
rendering
images
unclear
or
indistinguishable.
Additionally,
live-cell
imaging
faces
challenges
achieving
high
temporal
resolution
for
fast-moving
subcellular
structures.
Here,
we
present
principles
a
synthetic
wave
(SWM)
to
extract
three-dimensional
information
from
unlabeled
specimens,
where
photobleaching
and
phototoxicity
are
avoided.
SWM
exploits
multiple-wave
interferometry
reveal
specimen’s
phase
area
interest,
which
is
not
affected
by
optical
path.
achieves
~0.42
λ/NA
at
an
speed
up
106
pixels/s.
proves
better
sensitivity
than
most
conventional
microscopes
currently
available
while
maintaining
exceptional
SR
anti-scattering
capabilities.
Penetrating
through
challenging
techniques.
Remarkably,
retains
its
efficacy
even
conditions
low
signal-to-noise
ratios.
It
facilitates
visualization
dynamic
structures
live
cells,
encompassing
tubular
endoplasmic
reticulum
(ER),
lipid
droplets,
mitochondria,
lysosomes.
Abstract
Non‐line‐of‐sight
(NLOS)
imaging
enables
the
reconstruction
of
targets
beyond
direct
line
sight,
which
has
extensive
applications
across
various
fields.
However,
it
remains
unclear
how
and
to
what
extent
vectorial
nature
light,
plays
a
critical
role
in
optical
object
recognition,
can
enhance
performance
active
NLOS
imaging.
Here,
this
work
proposes
method
that
utilizes
vector
fields
(VOFs)
with
arbitrarily
designed
polarization
distributions
realize
challenging
conditions
low
signal‐to‐noise
ratio
(SNR).
A
generalized
VOF
reflection
model
is
established
at
relay
surface
for
determine
optimal
illumination
angle
as
well
received
polarization.
Based
on
model,
feasibility
multi‐view
demonstrated
enhanced
SNR
echo
signals
under
proper
modulation,
surpassing
limitations
conventional
single‐view
Simulations
experiments
validate
superior
proposed
approach
accurate
recognition
hidden
objects.
Nanophotonics,
Journal Year:
2024,
Volume and Issue:
13(20), P. 3765 - 3792
Published: June 6, 2024
Abstract
Recent
advancements
in
inverse
design
approaches,
exemplified
by
their
large-scale
optimization
of
all
geometrical
degrees
freedom,
have
provided
a
significant
paradigm
shift
photonic
design.
However,
these
innovative
strategies
still
require
full-wave
Maxwell
solutions
to
compute
the
gradients
concerning
desired
figure
merit,
imposing,
prohibitive
computational
demands
on
conventional
computing
platforms.
This
review
analyzes
challenges
associated
with
structures.
It
delves
into
adequacy
various
electromagnetic
solvers
for
designs,
from
neural
network-based
solvers,
and
discusses
suitability
limitations.
Furthermore,
this
evaluates
research
techniques,
advantages
disadvantages
applications,
sheds
light
cutting-edge
studies
that
combine
networks
applications.
Through
comprehensive
examination,
aims
provide
insights
navigating
landscape
advocate
strategic
methods,
solver
selection,
integration
overcome
barriers,
thereby
guiding
future
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(25), P. 7609 - 7615
Published: June 11, 2024
Long-wave
infrared
(LWIR)
imaging,
or
thermal
is
widely
applied
in
night
vision
and
security
monitoring.
However,
the
widespread
use
of
LWIR
imagers
impeded
by
their
bulky
size,
considerable
weight,
high
cost.
While
flat
meta-optics
present
a
potential
solution
to
these
limitations,
existing
pure
face
constraints
such
as
severe
chromatic
coma
aberrations.
Here,
we
introduce
an
approach
utilizing
large-scale
hybrid
address
challenges
demonstrate
achromatic,
coma-corrected,
polarization-insensitive
imaging.
The
metalens
doublet
composed
metasurface
corrector
refractive
lens,
featuring
full
field-of-view
angle
surpassing
20°
within
8-12
μm
wavelength
range.
Employing
this
doublet,
showcase
high-performance
imaging
capabilities
both
indoors
outdoors,
effectively
capturing
ambient
radiation.
proposed
holds
promise
for
advancing
miniaturized,
lightweight,
cost-effective
optical
systems.
Opto-Electronic Science,
Journal Year:
2024,
Volume and Issue:
3(10), P. 240014 - 240014
Published: Jan. 1, 2024
Design
of
multiple-feed
lens
antennas
requires
multivariate
and
multi-objective
optimization
processes,
which
can
be
accelerated
by
PSO
algorithms.
However,
the
algorithm
often
fails
to
achieve
optimal
results
with
limited
computation
resources
since
spaces
candidate
solutions
are
quite
large
for
antenna
designs.
This
paper
presents
a
design
paradigm
based
on
physics-assisted
particle
swarm
(PA-PSO)
algorithm,
guides
particles
laws
physics.
As
proof
concept,
compact
metalens
is
proposed,
measures
unprecedented
performances,
such
as
field
view
at
±55°,
21.7
dBi
gain
flatness
within
4
dB,
3-dB
bandwidth
>12°,
f-number
0.2.
The
proposed
PA-PSO
reaches
6
times
faster
than
ordinary
endows
promising
applications
in
including
but
not
Physica Scripta,
Journal Year:
2024,
Volume and Issue:
99(3), P. 036002 - 036002
Published: Jan. 19, 2024
Abstract
In
order
to
speed
up
the
process
of
optimizing
design
metasurface
absorbers,
an
improved
model
for
absorbers
based
on
autoencoder
(AE)
and
BiLSTM-Attention-FCN-Net
(including
bidirectional
long-short-term
memory
network,
attention
mechanism,
fully-connection
layer
network)
is
proposed.
The
structural
parameters
can
be
input
into
forward
prediction
network
predict
corresponding
absorption
spectra.
Meantime,
obtained
by
inputting
spectra
inverse
network.
Specially,
in
(BiLSTM)
effectively
capture
context
relationship
between
spectral
sequence
data,
mechanism
enhance
BiLSTM
output
features,
which
highlight
critical
feature
information.
After
training,
mean
square
error
(MSE)
value
validation
set
reverse
converges
0.0046,
R
2
reaches
0.975,
our
accurately
structure
within
1.5
s
with
a
maximum
0.03
mm.
Moreover,
this
achieve
optimal
multi-band
including
single-band,
dual-band,
three-band
absorptions.
proposed
method
also
extended
other
types
optimization
design.
