Opto-Electronic Advances,
Journal Year:
2022,
Volume and Issue:
6(8), P. 220141 - 220141
Published: Dec. 28, 2022
As
a
promising
counterpart
of
two-dimensional
metamaterials,
metasurfaces
enable
to
arbitrarily
control
the
wavefront
light
at
subwavelength
scale
and
hold
promise
for
planar
holography
applicable
multiplexing
devices.
Nevertheless,
degrees
freedom
(DoF)
orthogonally
multiplex
data
have
been
almost
exhausted.
Compared
with
state-of-the-art
methods
that
extensively
employ
orthogonal
basis
such
as
wavelength,
polarization
or
orbital
angular
momentum,
we
propose
an
unprecedented
method
peristrophic
by
combining
spatial
frequency
orthogonality
detour
phase
principle.
The
relationship
between
incident
locally
shifted
building
blocks
can
be
regarded
additional
DoF.
We
experimentally
demonstrate
viability
multiplexed
holograms.
Moreover,
this
newly-explored
is
compatible
conventional
DoFs.
Our
findings
will
contribute
development
provide
novel
solution
nanophotonics,
large-capacity
chip-scale
devices
highly
integrated
communication.
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(23), P. 10991 - 10997
Published: Nov. 29, 2023
Imaging
polarimeters
find
many
critical
applications
in
ranging
from
remote
sensing
to
biological
detection.
Metasurfaces
have
been
proposed
as
a
compact
approach
for
imaging
polarimeters,
but
prior
strategies
suffer
low
resolution.
Here,
we
propose
an
interleaved
metalens
configuration
polarization
where
three-row
metasurface
units
within
group
individually
interact
with
three
pairs
of
orthogonal
channels.
The
optical
paths
between
the
object
and
adjacent
metasurfaces
are
nearly
equal,
allowing
construction
polarimeter
unlimited
numerical
aperture
(NA),
which
is
beneficial
high-resolution
imaging.
fabricated
by
crystalline
silicon
nanostructures
has
NA
0.51
at
632.8
nm
achieves
resolution
up
1.2-fold
wavelength.
Polarimetric
microscopy
experiments
demonstrate
that
can
realize
various
microscopic
samples.
This
study
offers
promising
solution
imaging,
potential
widespread
applications.
Electronics,
Journal Year:
2023,
Volume and Issue:
12(12), P. 2655 - 2655
Published: June 13, 2023
When
surface
plasmon
resonance
(SPR)
occurs,
the
incident
light
is
absorbed
by
of
SPR
structure,
thus
minimizing
intensity
reflected
light.
Therefore,
method
adopted
in
this
paper
to
achieve
perfect
absorption
absorbent.
In
paper,
we
first
propose
a
multi-frequency
broadband
absorber
structure
based
on
graphene
SPR,
which
uses
continuous
patterned
frequency
spectrum
form
absorption.
simulation,
sandwich-stack
was
adopted,
whereby
situated
top
SiO2
layer
and
metal
layer.
The
broad-band
bands
were
obtained
as
4.14–4.38
THz,
5.78–6.36
7.87–8.66
THz
through
analog
simulation
finite-difference
time-domain
(FDTD)
solutions.
Then,
multi-layer
resonant
unit
superposition
combination
absorbing
units
responding
different
bands,
ultra-wideband
achieved.
data
results
illustrate
that
total
bandwidth
2.26
relative
Bw
equal
28.93%.
electric
field
X-Y
direction
band
analyzed,
respectively,
dynamic
tunability
studied.
Finally,
studied
whether
still
has
efficient
characteristics
for
two
polarization
modes
when
angle
changed
from
0°
70°.
model
proposed
potential
value
application
terahertz
photoelectric
detection,
filtering,
electromagnetic
shielding.
Communications in Theoretical Physics,
Journal Year:
2024,
Volume and Issue:
76(6), P. 065701 - 065701
Published: April 7, 2024
Abstract
This
study
introduces
an
innovative
dual-tunable
absorption
film
with
the
capability
to
switch
between
ultra-wideband
and
narrowband
absorption.
By
manipulating
temperature,
can
achieve
multi-band
within
30–45
THz
range
or
spanning
30–130
THz,
rate
exceeding
0.9.
Furthermore,
structural
parameters
of
are
optimized
using
particle
swarm
optimization
(PSO)
algorithm
ensure
optimal
response.
The
response
is
primarily
attributed
coupling
guided-mode
resonance
local
surface
plasmon
effects.
film’s
symmetric
structure
enables
polarization
incoherence
allows
for
tuning
through
various
means
such
as
doping/voltage,
temperature
parameters.
In
case
a
response,
exhibits
good
sensitivity
refractive
index
changes
in
multiple
modes.
Additionally,
spectrum
remains
effective
even
at
large
incidence
angles,
making
it
highly
promising
applications
fields
biosensing
infrared
stealth.
Opto-Electronic Science,
Journal Year:
2023,
Volume and Issue:
2(3), P. 220026 - 220026
Published: Jan. 1, 2023
Multispectral
and
polarized
focusing
imaging
are
key
functions
that
vitally
important
for
a
broad
range
of
optical
applications.
Conventional
techniques
generally
require
multiple
shots
to
unveil
desired
information
implemented
via
bulky
multi-pass
systems
or
mechanically
moving
parts
difficult
integrate
into
compact
integrated
systems.
Here,
design
ultra-compact
transversely
dispersive
metalens
capable
both
spectrum
polarization
ellipticity
recognition
reconstruction
in
just
single
shot
is
demonstrated
with
coherent
incoherent
light.
Our
well
suited
high-speed
analysis
can
significantly
reduce
the
size
weight
conventional
devices
while
simplifying
process
collecting
information,
thereby
promising
various
applications,
including
machine
vision,
minimized
spectrometers,
material
characterization,
remote
sensing,
other
areas
which
comprehensive
analysis.
