Physica Scripta,
Год журнала:
2024,
Номер
99(2), С. 025517 - 025517
Опубликована: Янв. 3, 2024
Abstract
A
device
constructed
from
metamaterials
is
proposed,
which
makes
asymmetric
transmission
and
reflection
achieved
in
addition
to
a
perfect
dual-band
unidirectional
reflectionlessness
at
THz
frequencies
for
linearly
polarized
incident
waves.
Owing
the
unique
structure
characteristics,
it
exhibits
an
excellent
performance
of
converting
linear
circular
polarization
multiple
frequencies.
Moreover,
maximum
PCR
reaches
99.94%,
ellipticity
approaches
1
eight
Additionally,
UR
AT
are
within
broad
ranges
incidence
angle
θ
distance
d
between
two
resonators.
Utilization
metamaterial
design
will
facilitate
multifunctionality
meta-device
promote
further
advancements
integrated
processes,
communication,
radar
other
fields.
Micromachines,
Год журнала:
2023,
Номер
14(1), С. 169 - 169
Опубликована: Янв. 9, 2023
In
this
study,
a
tunable
terahertz
(THz)
metamaterial
using
the
micro-electro-mechanical
system
(MEMS)
technique
is
proposed
to
demonstrate
pressure
sensing
application.
This
MEMS-based
(MTM)
structure
composed
of
gold
(Au)
split-ring
resonators
(SRRs)
on
patterned
silicon
(Si)
substrate
with
through
Si
via
(TSV).
SRR
designed
as
cantilever
TSV
structure.
When
airflow
passes
from
bottom
up
and
then
bends
cantilever,
will
bend
upward.
The
electromagnetic
responses
MTM
show
tunability
polarization-dependent
characteristics
by
bending
cantilever.
resonances
can
both
be
blue-shifted
0.721
THz
0.796
tuning
range
0.075
in
transverse
magnetic
(TM)
mode
0.805
0.945
0.140
electric
(TE)
changing
angle
10°
45°.
These
results
provide
potential
applications
possibilities
design
for
use
flow
rate
sensors.
Advanced Photonics Nexus,
Год журнала:
2024,
Номер
3(01)
Опубликована: Янв. 10, 2024
Carbon-based
materials,
such
as
graphene
and
carbon
nanotubes,
have
emerged
a
transformative
class
of
building
blocks
for
state-of-the-art
metamaterial
devices
due
to
their
excellent
flexibility,
light
weight,
tunability.
In
this
work,
tunable
carbon-based
metal-free
terahertz
(THz)
metasurface
with
ultrabroadband
absorption
is
proposed,
composed
alternating
graphite
patterns,
where
the
Fermi
level
adjusted
by
varying
applied
voltage
bias
achieve
characteristics.
particular,
when
1
eV,
coefficient
exceeds
90%
from
7.24
through
16.23
THz,
importantly,
bandwidth
reaches
much
8.99
THz.
addition,
it
polarization-insensitive
incident
waves
maintains
high
rate
at
an
angle
up
50
deg.
This
device
enjoys
higher
bandwidth,
rates,
performance
compared
conventional
absorbers
in
THz
regime
can
be
potentially
various
fields,
including
wave
sensing,
modulation,
well
wearable
health
care
devices,
biomedicine
detection.
IEEE Sensors Journal,
Год журнала:
2024,
Номер
24(6), С. 7690 - 7699
Опубликована: Фев. 1, 2024
Metasurface
(MS)-based
terahertz
(THz)
biosensors
have
attracted
significant
attention
in
the
biological
field
due
to
their
nondestructive
and
harmless
interaction
with
biochemical
samples.
However,
it
is
still
challenging
for
specific
detection
mixed
samples
via
THz
metasensors.
In
this
work,
we
modified
MS
chips
target
biomolecules,
respectively,
utilized
immune
binding
gold
nanorods
(GNRs),
achieved
high-sensitive
Alzheimer's
marker
$\text{A}\beta
_{\text
{1-42}}$
protein
a
microfluidic
platform.
A
double-ring
coupled
metallic
that
can
provide
strong
localized
enhancement
was
fabricated
then
-antibody
by
covalent
capture
.
Moreover,
GNRs
were
introduced
bind
,
sensor's
response
greatly
enhanced.
Through
sensor-analytes
modification,
sensitivity
of
sensor
reach
240.91
GHz
notation="LaTeX">$\cdot
$
mL/nmol,
limit
(LoD)
one
order
magnitude
higher
than
without
GNRs.
addition,
LoD
reached
0.2
pmol/mL
(1
ng/mL),
which
100
times
other
nonspecific
proteins.
More
importantly,
biosensor
also
recognize
sample
physiological
limiting
concentration.
Our
high
selectivity
nanomaterial-MS
hybrid-based
would
give
access
rich
applications
label-free
biosensing.
Next-generation
cellular
technologies,
commonly
referred
to
as
the
sixth
generation
(6G),
are
envisioned
support
a
higher
system
capacity,
better
performance,
and
network
sensing
capabilities.The
terahertz
(THz)
band
is
one
potential
enabler
this
end
due
large
unused
frequency
bands
high
spatial
resolution
enabled
by
short
signal
wavelength
bandwidth.Different
from
earlier
surveys,
paper
presents
comprehensive
treatment
technology
survey
on
THz
communications
in
terms
of
advantages,
Physica Scripta,
Год журнала:
2024,
Номер
99(2), С. 025517 - 025517
Опубликована: Янв. 3, 2024
Abstract
A
device
constructed
from
metamaterials
is
proposed,
which
makes
asymmetric
transmission
and
reflection
achieved
in
addition
to
a
perfect
dual-band
unidirectional
reflectionlessness
at
THz
frequencies
for
linearly
polarized
incident
waves.
Owing
the
unique
structure
characteristics,
it
exhibits
an
excellent
performance
of
converting
linear
circular
polarization
multiple
frequencies.
Moreover,
maximum
PCR
reaches
99.94%,
ellipticity
approaches
1
eight
Additionally,
UR
AT
are
within
broad
ranges
incidence
angle
θ
distance
d
between
two
resonators.
Utilization
metamaterial
design
will
facilitate
multifunctionality
meta-device
promote
further
advancements
integrated
processes,
communication,
radar
other
fields.
