Multispectral metasurface for visible transparency, infrared stealth, and mm-wave frequency-multiplexing
Materials & Design,
Год журнала:
2025,
Номер
unknown, С. 113903 - 113903
Опубликована: Март 1, 2025
Язык: Английский
High-Spatial and Spectral Resolution Snapshot Spectral Imaging Based on Nearfield Coupled Metasurfaces
ACS Photonics,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 2, 2025
Язык: Английский
Miniaturized metamaterial terahertz polarization detector
Journal of Applied Physics,
Год журнала:
2025,
Номер
137(14)
Опубликована: Апрель 8, 2025
We
propose
a
metamaterial
strategy
for
achieving
compact,
fast
terahertz
linear
polarization
and
intensity
detection.
The
device
consists
of
three
elements
arranged
in
triple
rotational
symmetry,
with
an
overall
size
on
the
same
order
magnitude
as
operating
wavelength.
With
excitation,
local
dynamic
fields
generated
by
couple
produce
Lorentz
force,
which
drives
unidirectional
motion
carriers
photoelectric
detection
intensity.
Meanwhile,
can
be
achieved
based
arrangement
identical
their
polarization-dependent
voltage
output.
This
method
easily
extended
across
multiple
frequency
bands,
offering
new
mechanism
developing
miniaturized
imaging
on-chip
photonic
devices.
Язык: Английский
Transparent and Tunable Radar‐Infrared Bi‐Stealth Metamaterial Based on Water and Metallic Mesh for Optical Window Applications
Advanced Materials Technologies,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
Abstract
In
this
paper,
we
present
a
transparent
and
tunable
radar‐infrared
bi‐stealth
metamaterial
consisting
of
an
infrared
shielding
layer
(IRSL),
radar‐absorbing
(RAL),
water
substrate,
metal
meshed
reflective
backplane.
The
IRSL
consists
array
indium
tin
oxide
square
patches,
reducing
emissivity
transmitting
microwaves.
the
RAL,
ultrathin
metallic
meshes
with
different
periods
are
integrated
into
one
to
broaden
microwave
absorption
bandwidth.
Moreover,
substrate
facilitates
tunability
performance
via
its
fluidity.
Experimental
measurements
simulations
indicate
that
fabricated
sample
can
achieve
over
90%
within
wide
frequency
range
3.6–15.8
GHz
relative
bandwidth
126%.
band
be
further
switched
3.6–5.9
11.2–13.8
by
simply
adjusting
thickness.
addition,
low
≈0.37
is
achieved
in
atmospheric
window
(8–14
µm),
while
measured
average
optical
transmittance
reaches
65.5%
at
400–800
nm.
main
advantage
proposed
compatibility
across
visible,
infrared,
regions
simultaneous
realization
high
transparency,
reduced
emissivity,
broadband
switchable
absorption.
Given
these
multiple
functionalities
superior
performances,
has
great
application
potential
aircraft
windows,
glass
curtain
walls
buildings,
counter‐surveillance
devices,
wireless
communication
systems.
Язык: Английский
Room-Temperature Lasing at Flatband Bound States in the Continuum
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 12, 2025
High-quality
factor
optical
modes
with
a
low
dispersion
in
the
momentum
space
are
highly
desirable
for
applications
such
as
low-threshold
lasers,
strong
light-matter
interactions,
and
trapping.
Bound
states
continuum
(BICs)
have
recently
gained
attention
promising
cavity
concept
due
to
their
theoretically
infinite
quality
factors.
However,
decreases
exponentially
when
deviating
from
BIC
singularity
space,
which
limits
practical
use.
Here,
we
present
design
experimental
realization
of
flatband
BICs
rectangular
array
titanium
dioxide
nanopillars.
By
precisely
engineering
interaction
between
four
counterpropagating
guided
array,
nondispersive
band
can
be
obtained.
The
exhibits
an
enhanced
near
Γ-point
by
2
orders
magnitude
compared
that
symmetry-protected
mode
square
along
exceptionally
high
density
states.
As
result,
achieve
room-temperature
lasing
at
∼9100
threshold
4
times
lower
than
BIC.
flatband-BIC
properties,
directionality
topological
charge,
also
studied
detail.
outstanding
performance
presented
our
work
mark
important
step
toward
efficient
cavities
microlasers
hold
great
potential
advanced
photonic
optoelectronic
devices.
Язык: Английский
Filterless Vector Light Field Photodetector via Non-hermitian Semiconductor Nanostructures
Optics Express,
Год журнала:
2024,
Номер
33(2), С. 2395 - 2395
Опубликована: Дек. 29, 2024
Recent
advances
in
near-field
interference
detection,
inspired
by
the
non-Hermitian
coupling-induced
directional
sensing
of
Ormia
ochracea,
have
demonstrated
potential
paired
semiconductor
nanowires
for
compact
light
field
detection
without
optical
filters.
However,
practical
implementation
faces
significant
challenges
including
limited
active
area,
architectural
scaling
constraints,
and
incomplete
characterization
angular
polarization
information.
Here,
we
demonstrate
a
filterless
vector
photodetector,
leveraging
angle-
polarization-sensitive
nanostructures.
Our
design
unit
comprises
four
devices,
each
containing
identical
silicon
but
varying
orientation
electric
connection
configuration,
which
four-dimensional
photoconductive
output
can
be
uniquely
mapped
to
key
parameters:
intensity,
polar
angle,
azimuth
linear
difference
(Stokes
parameter,
S
1
).
Optimization
geometry
doping
concentration
these
optoelectronic
nanostructures
yields
theoretical
angle
detectivity
4
×
10
−5
°/Hz
0.5
.
This
work
establishes
paradigm
multi-output
photodetectors
with
full-rank
response
matrices
multi-dimensional
characterization,
paving
way
integrated
systems.
Язык: Английский