Nanomaterials,
Год журнала:
2024,
Номер
14(23), С. 1973 - 1973
Опубликована: Дек. 8, 2024
Metalens
can
achieve
arbitrary
light
modulation
by
controlling
the
amplitude,
phase,
and
polarization
of
incident
waves
have
been
applied
across
various
fields.
This
paper
presents
a
color
router
designed
based
on
metalens,
capable
effectively
separating
spectra
from
visible
to
near-infrared
light.
Traditional
design
methods
for
meta-lenses
require
extensive
simulations,
making
them
time-consuming.
In
this
study,
we
propose
deep
learning
network
forward
prediction
broad
wavelength
range,
combined
with
particle
swarm
optimization
algorithm
metalens
efficiently.
The
simulation
results
align
closely
theoretical
predictions.
simultaneously
meet
transmission
phase
target
spectra,
specifically
red,
green,
blue,
light,
focus
into
designated
areas.
Notably,
optical
efficiency
reaches
40%,
significantly
surpassing
traditional
filters.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Март 28, 2025
Flat
optics
have
been
proposed
as
an
attractive
approach
for
the
implementation
of
new
imaging
and
sensing
modalities
to
replace
augment
refractive
optics.
However,
chromatic
aberrations
impose
fundamental
limitations
on
diffractive
flat
As
such,
true
broadband
high-quality
has
thus
far
out
reach
fast
f-numbers,
large
aperture,
In
this
work,
we
overcome
intrinsic
spectral
bandwidth
limitations,
achieving
in
visible
wavelength
range
with
a
meta-optic,
co-designed
computational
reconstruction.
We
derive
necessary
conditions
broadband,
1
cm
f/2
optic,
diagonal
field
view
30°
average
system
MTF
contrast
20%
or
larger
spatial
frequency
100
lp/mm
band
(>30%
<70
lp/mm).
Finally,
use
coaxial,
dual-aperture
train
meta-optic
learned
reconstruction
method
operating
pair-wise
captured
data.
Fundamentally,
our
work
challenges
entrenched
belief
inability
capturing
high-quality,
full-color
images
using
single
aperture
meta-optic.
Advanced Photonics,
Год журнала:
2024,
Номер
6(06)
Опубликована: Ноя. 14, 2024
Recent
advances
in
metasurface
lenses
(metalenses)
have
shown
great
potential
for
opening
a
new
era
compact
imaging,
photography,
light
detection,
and
ranging
(LiDAR)
virtual
reality/augmented
reality
applications.
However,
the
fundamental
trade-off
between
broadband
focusing
efficiency
operating
bandwidth
limits
performance
of
metalenses,
resulting
chromatic
aberration,
angular
relatively
low
efficiency.
A
deep-learning-based
image
restoration
framework
is
proposed
to
overcome
these
limitations
realize
end-to-end
metalens
thereby
achieving
aberration-free
full-color
imaging
mass-produced
metalenses
with
10
mm
diameter.
Neural-network-assisted
achieved
high
resolution
comparable
that
ground
truth
image.
Optical
metasurfaces,
planar
artificial
media
capable
of
controlling
light
propagation,
are
transitioning
from
laboratory
curiosity
to
commercial
applications.
This
shift
requires
advanced
meta-atom
and
metasurface
designs,
considering
manufacturability
enhancing
optical
performance
with
post-processing
algorithms.
Artificial-Intelligence(AI),
particularly
machine-learning(ML)
optimization,
offers
solutions
these
demands.
perspective
systematically
reviews
AI's
potential
impact
in
three
critical
areas:
AI-enabled
design-for-manufacturing(DFM),
design
beyond
the
classical
local
phase
approximation,
AI-empowered
computational
backend.
ACS Photonics,
Год журнала:
2024,
Номер
11(8), С. 2906 - 2922
Опубликована: Авг. 12, 2024
Optical
imaging
and
sensing
systems
based
on
diffractive
elements
have
seen
massive
advances
over
the
last
several
decades.
Earlier
generations
of
optical
processors
were,
in
general,
designed
to
deliver
information
an
independent
system
that
was
separately
optimized,
primarily
driven
by
human
vision
or
perception.
With
recent
deep
learning
digital
neural
networks,
there
been
efforts
establish
are
jointly
optimized
with
networks
serving
as
their
back-end.
These
hybrid
(optical
+
digital)
a
new
"diffractive
language"
between
input
electromagnetic
waves
carry
analog
process
digitized
at
back-end,
providing
best
both
worlds.
Such
designs
can
spatially
temporally
coherent,
partially
incoherent
waves,
universal
coverage
for
any
varying
set
point
spread
functions
be
given
task,
executed
collaboration
networks.
In
this
Perspective,
we
highlight
utility
exciting
engineered
programmed
diffraction
diverse
range
applications.
We
survey
some
major
innovations
enabled
push–pull
relationship
analogue
wave
processing
also
covering
significant
benefits
could
reaped
through
synergy
these
two
complementary
paradigms.
Achieving
broadband
achromaticity
in
the
visible
spectrum
is
critical
for
enhancing
imaging
performance
of
metalenses.
However,
many
previous
studies
remain
constrained
by
small
device
sizes
or
numerical
aperture.
In
this
study,
we
propose
a
polarization-multiplexed
metalens
capable
generating
zero-
and
high-order
Bessel
beams
to
achieve
quasi-achromatic
correction
without
size
limitations.
An
image
subtraction
method
with
two
polarization
channels
developed
mitigate
beam
sidelobes
improve
quality.
Our
results
demonstrate
an
effective
focusing
over
continuous
wavelength
range
450-700
nm
long
focus
depth.
The
significantly
enhances
clarity
contrast,
providing
new
insights
full-color
detection.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 8, 2025
Abstract
Metasurface
holography
has
emerged
as
a
versatile
tool
for
manipulating
light
at
subwavelength
scales,
offering
enhanced
capabilities
in
multiplexing
high‐resolution
holographic
images.
However,
the
scalability
of
channel
remains
significant
challenge.
In
this
paper,
high‐capacity
single‐cell
metasurface
is
presented
capable
maximizing
channels
by
images
across
both
spin
and
wavelength
using
single‐phase
map.
The
achievement
simultaneous
left‐
right‐circular
polarization
states
detailed
broad
spectral
range,
from
visible
to
near‐infrared
wavelengths,
metasurface,
optimized
through
an
inverse
design
minimize
loss
between
target
output
automatic
differentiation.
phase
profile
encode
multiple
without
requiring
complex
meta‐atoms,
thereby
reducing
fabrication
complexity
while
maintaining
high
performance.
Using
method,
two
implementations
are
demonstrated,
8‐channel
hologram
covering
regions
36‐channel
operating
full‐visible
spectrum
18
wavelengths
separated
20‐nm
intervals.
Furthermore,
noise‐related
functions
incorporated
into
optimization
process
suppress
background
noise
inter‐channel
crosstalk,
resulting
significantly
improved
image
quality
fidelity.
This
approach
offers
reliable
solution
further
photonic
applications
such
displays,
optical
data
storage,
information
encryption.
Sensors,
Год журнала:
2025,
Номер
25(10), С. 3202 - 3202
Опубликована: Май 20, 2025
Conventional
metalenses
struggle
with
chromatic
aberration
and
narrow
field
of
view
(FOV),
making
it
challenging
to
meet
the
dispersion
requirements
for
large
apertures
compensate
off-axis
aberrations
wide
FOV.
Here,
we
demonstrate
a
hybrid
metalens
module
consisting
five
refractive
plastic
lenses
polarization-insensitive
achieve
broadband
achromatic
imaging
within
400–700
nm
FOV
up
100°.
The
system
exhibits
negligible
variation
in
focal
length
(~1.2%)
across
visible
range
(460–656
nm)
consistently
achieves
modulation
transfer
function
(MTF)
values
>
0.2
at
167
lp/mm
all
wavelengths
incident
angles.
We
also
integrated
lens
modules
that
capture
high-quality
images
from
distances
ranging
between
0.5
4
m
without
post-processing,
showcasing
its
potential
compact,
wide-angle
optical
systems.
