Microsystems & Nanoengineering,
Год журнала:
2024,
Номер
10(1)
Опубликована: Дек. 24, 2024
Abstract
Metasurface
with
natural
static
structure
limits
the
development
of
dynamic
metasurface
holographic
display
rapid
response
and
broadband.
Currently,
liquid
crystal
(LC)
was
integrated
onto
to
convert
passive
metasuface
into
an
active
one.
But,
majority
LC-assisted
metasurfaces
often
exhibit
trade-offs
among
degree
freedom
(DoF,
typically
less
than
2),
information
capacity,
speed,
crosstalk.
Herein,
at
first
time,
we
experimentally
demonstrate
a
cascaded
device
polymer
dispersed
(PDLC)
broadband
metasurface,
enabling
three-dimensional
(3D)
ultra-high
contrast,
continuous
regulation.
The
PDLC
droplets
enable
modulation
scattering
state
incident
light
by
high-speed
control
system
for
electric
scanning.
Based
on
self-addressing,
multi-channel
PDLC-metasurface
device,
effect
monochrome
images
switching
color-changing
broadband,
low-crosstalk
high
has
been
achieved.
Our
approach
offers
novel
perspective
metasurface.
Annalen der Physik,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Abstract
Grating
metasurfaces
supporting
guided‐mode
resonance
(GMR)
can
provide
ultra‐sharp
resonances
for
light‐matter
solid
interactions,
facilitating
their
applications
in
various
fields
such
as
sensing,
lasers,
and
imaging.
Bound
states
the
continuum
(BICs)
are
unique
resonant
modes
located
radiative
domain
but
fully
bound
without
energy
leakage.
BIC
be
transformed
into
quasi‐bound
(QBICs)
coupled
to
external
radiation
meet
demand
high‐Q
resonances.
Here,
a
broadband
dielectric
terahertz
(THz)
sensor
is
presented
GMR,
which
facilitates
generation
of
whose
QBIC
reach
quality
factor
10
3
.
The
has
signal
enhancement
more
than
dB
over
entire
frequency
range
1.25–2.20
THz
accurately
analyze
three
absorption
peaks
explosive
materials.
design
breaks
through
single‐peak
scanning
detection
by
cross‐fertilizing
with
generating
an
angular
manipulation
ultra‐broadband
spectrum.
It
provides
powerful
tool
ultrasensitive
trace
analysis
will
facilitate
many
new
sensing
applications.
Meanwhile,
structure
support
combination
flexible
materials,
improving
performance
devices
broadening
optoelectronic
devices.
Optical
metasurfaces
(MSs),
with
their
inherent
design
flexibility
and
subwavelength-scale
control
of
light,
offer
promising
solutions
for
miniaturizing
bulky
optical
components.
Shared-aperture
MSs
further
enhance
functionality
by
integrating
multiple
through
segmented
or
interleaved
designs.
However,
under
uniform
illumination,
all
encoded
functions
are
simultaneously
activated,
resulting
in
undesirable
crosstalk
enhanced
background.
In
this
work,
we
propose
experimentally
demonstrate
selectively
addressed
(ILMSs)
making
use
the
dynamically
controlled
Talbot
effect,
which
is
realized
a
configuration
comprising
diffraction
grating
(DG)
cascaded
piezo-controlled
polarization-multiplexed
ILMS.
By
accurately
controlling
DG-ILMS
distance,
leverage
position-dependent
fringes
to
achieve
dynamic
activation
different
functionalities.
We
believe
that
our
approach
provides
versatile
integrated
solution
addressing
multifunctional
ILMSs
thereby
paves
way
development
advanced
highly
systems.
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.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 12, 2025
Abstract
Terahertz
(THz)
generation
is
a
crucial
initial
step
in
THz
applications.
However,
the
current
sources
face
challenges
fully
controlling
propagation
properties
of
generated
waves
without
use
external
devices.
This
limitation
leads
to
bulky
systems
with
unavoidable
insertion
losses
and
bandwidth
constraints.
To
overcome
these
facilitate
compact
versatile
applications,
novel
approach
using
nonlinear
metasurfaces
proposed
control
amplitude,
phase,
polarization
broadband
directly
simultaneously
at
emission
stage.
The
basic
design
features
an
elaborated
coupling‐controlled
chiral
meta‐atom,
providing
adjustable
chirality
allowing
independent
amplitude
phase
strategy
under
circularly
polarized
(CP)
pump.
Furthermore,
state
emitted
wave
can
be
arbitrarily
customized
by
designing
superposition
left‐handed
(LCP)
right‐handed
(RCP)
components.
linearly
predictable,
eliminating
need
for
complex
simulations
interleaved
supercell
arrangements.
effectiveness
this
method
demonstrated
experimentally
generating
two
types
unique
vectorial
fields:
spatial‐polarization
separable
nonseparable
states.
significantly
enhances
capabilities
metasurfaces,
paving
way
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Май 14, 2025
Information
security
aims
to
protect
confidentiality
and
prevent
information
leakage,
which
inherently
conflicts
with
the
goal
of
sharing.
Balancing
these
competing
requirements
is
especially
challenging
in
all-optical
systems,
where
efficient
data
transmission
rigorous
are
essential.
Here
we
propose
experimentally
demonstrate
a
metasurface-based
approach
that
integrates
phase
manipulation,
polarization
conversion,
as
well
direction-
polarization-selective
functionalities
into
diffractive
neural
networks
(DNNs).
This
enables
polarization-controllable
switch
between
unidirectional
bidirectional
DNNs,
thus
simultaneously
realizing
A
cascaded
terahertz
metasurface
comprising
quarter-wave
plates
metallic
gratings
designed
function
unidirectional-bidirectional
classifier
imager.
By
introducing
half-wave
cascade
metasurface,
achieve
polarization-controlled
transition
unidirectional-bidirectional-unidirectional
modes
for
classification
imaging.
Furthermore,
high-security
exchange
framework
based
on
DNNs.
The
proposed
DNNs
polarization-switchable
unidirectional/bidirectional
capabilities
offer
significant
potential
privacy
protection,
encryption,
communications,
exchange.
Laser & Photonics Review,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 21, 2025
Abstract
Polarization
transformation
plays
a
key
role
in
applications
of
photonics
and
quantum
optics.
Traditional
bulky
optical
components
are
inadequate
for
miniaturized
systems,
while
metasurfaces
offer
revolutionary
solution,
but
still
face
challenges
with
vector
polarization
tunability.
Here,
tunable
mechanism
is
introduced,
utilizing
bifacial
enabled
meta‐cavity.
By
adjusting
the
cavity
length
phase
modulations
to
achieve
complex
interferences
two
spin
light,
diverse
transformations
demonstrated
on
higher‐order
hybrid‐order
Poincaré
spheres.
The
results
outline
powerful
paradigm
realize
way
can
open
new
possibilities
communications,
encryption,
beyond.
