Electronics,
Год журнала:
2025,
Номер
14(3), С. 603 - 603
Опубликована: Фев. 4, 2025
In
this
paper,
a
novel
dual-band
metasurface
filter
(MSF)
designed
for
accurately
differentiating
pulse
waves
(PWs)
and
continuous
(CWs)
is
proposed,
which
based
on
complementary
cross
resonator
(CSR)
structure
adhered
dielectric
substrate
integrated
with
capacitive
nonlinear
circuit.
The
unit
cell
of
the
MSF
comprises
two
identical
CSR
structures:
one
circuits
configured
in
parallel
capacitor
(C1)
within
structure.
These
structures
loaded
are
fabricated
substrate.
simulation
outcomes
reveal
that,
normally
incident
CWs
an
input
power
10
dBm,
transmittance
reaches
as
high
97.1%
at
2.0
GHz
93.9%
3.45
GHz.
contrast,
when
it
comes
to
50
ns
short
PWs,
remains
consistently
below
6%
throughout
entire
frequency
range
from
1
5
addition,
PWs
increases
significantly
width
widens
aforementioned
discrete
frequencies.
ensuing
data
corroborates
that
−15
15
difference
between
first
rises
then
falls
increases.
Specifically,
specified
dBm
angle
oblique
incidence
ranges
0°
60°,
context
TE
TM
modes,
exceeds
80%
around
both
GHz,
while
15%.
Finally,
effects
resistance
capacitance
also
studied.
proposed
herein
showcases
its
potential
applications
wireless
communication
well
realm
anti-electromagnetic
interference.
electromagnetic
(EM)
waveform
modulation
band
1–5
has
great
development
prospects
low-frequency
working
fields
such
radar
antennas
EM
protection.
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
In
this
paper,
a
vanadium
dioxide
(VO2)-based
terahertz
device
is
proposed
to
realize
the
conversion
between
broadband
absorption
and
transmission
functions,
including
VO2
bottom
layer,
dielectric
layer
pattern
in
three-layer
structure.
With
change
of
conductivity,
metamaterial
can
switch
transmission.
When
exhibits
transmission,
it
has
high
transmittance
90%
for
waves
5.6
THz
8.7
frequency
band.
absorption,
3.66
9.98
Furthermore,
with
increasing
peak
decreases
from
93.8%
0%
increases
1%
99.5%.
The
impedance
matching
theory
invoked
physical
mechanism
elucidated
by
analyzing
surface
electric
field
device.
By
studying
characteristics
different
incidence
polarization
angles,
insensitive
good
performance
over
large
angles.
Compared
other
absorbers
metamaterials,
structure
study
unique
design
diverse
functions
play
an
important
role
various
fields
such
as
communications,
electromagnetic
stealth,
sensors,
thermal
emission
devices.
Photonics,
Год журнала:
2025,
Номер
12(2), С. 148 - 148
Опубликована: Фев. 12, 2025
We
propose
a
highly
efficient
broadband
tunable
metamaterial
infrared
absorption
device.
The
design
is
modeled
using
the
three-dimensional
finite
element
method
for
results
show
that
device
captures
over
90%
of
light
in
wavelength
range
from
6.10
μm
to
17.42
μm.
utilize
VO2’s
phase
change
property
adjust
device,
allowing
average
level
vary
between
20.61%
and
94.88%.
In
this
study,
we
analyze
electromagnetic
field
distribution
at
its
peak
point
find
high
achieved
through
both
surface
plasmon
resonance
Fabry–Perot
cavity
resonance.
structural
parameters
are
fine-tuned
parameter
scanning.
By
comparing
our
work
with
previous
studies,
demonstrate
superior
performance
design.
Additionally,
investigate
polarization
angle
incident
it
insensitive
these
factors.
Importantly,
simple
structure
broadens
potential
uses
photodetection,
stealth,
sensing.
Molecules,
Год журнала:
2025,
Номер
30(5), С. 999 - 999
Опубликована: Фев. 21, 2025
We
employed
the
CST
Microwave
Studio
software
2020
and
FDID
algorithm
for
simulation.
have
designed
a
terahertz
broadband
absorber
based
on
Dirac
semimetals
graphene,
achieving
continuous
absorption
with
rate
exceeding
80%
over
range
from
7.6776
to
9.172
THz.
This
features
two
independent
tuning
modes,
utilizing
graphene
semimetals,
exhibits
strong
electromagnetic
adaptability.
Furthermore,
we
conducted
an
in-depth
analysis
of
physical
mechanisms
underlying
high
in
these
absorbers
using
impedance
matching
theory
localized
surface
plasmon
resonance
(LSPR)
theory.
Variations
dielectric
constants
different
layers
relaxation
time
can
also
modulate
rate.
In
summary,
our
proposed
absorber,
employing
distinct
tunable
materials,
enhances
device’s
flexibility
environmental
adaptability,
offering
promising
prospects
wideband
applications.
