Advances in Physics X,
Год журнала:
2023,
Номер
8(1)
Опубликована: Июль 20, 2023
Metasurfaces,
the
planar
version
of
artificial
structured
media
at
sub-wavelength
scale,
provide
ability
to
manipulate
light
wave
in
a
naturally
unavailable
way.
They
offer
an
unprecedented
platform
for
plethora
applications
ranging
from
holography,
imaging,
optical
communication
nonlinear
source
and
quantum
computing.
Conventionally
straightforwardly,
metasurfaces
are
prepared
ordered
configuration,
aiming
reducing
geometric
fluctuations
guarantee
good
performance
as
designed.
On
other
hand,
inevitability
fabrication
imperfection
nanophotonics
unique
properties
disorder
have
been
inspiring
exploration
with
novel
design.
To
supplement
comprehensiveness
review
metasurfaces,
here,
we
overview
mechanisms,
characteristics
related
disordered
concentrating
on
recent
progresses
manipulation
energy
harvesting
beyond.
Besides
reviewing
achievements
wide
range
metasurface,
outlook
their
future
developments.
With
features,
metasurface
may
be
promising
alternative
ones,
especially
practical
requirement
large-scale
production.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 2, 2024
Abstract
Meta-lenses
composed
of
artificial
meta-atoms
have
stimulated
substantial
interest
due
to
their
compact
and
flexible
wavefront
shaping
capabilities,
outperforming
bulk
optical
devices.
The
operating
bandwidth
is
a
critical
factor
determining
the
meta-lens’
performance
across
various
wavelengths.
that
operate
in
narrowband
manner
relying
on
nonlocal
effects
can
effectively
reduce
disturbance
crosstalk
from
non-resonant
wavelengths,
making
them
well-suitable
for
specialized
applications
such
as
nonlinear
generation
augmented
reality/virtual
reality
display.
However,
meta-lenses
require
striking
balance
between
local
phase
manipulation
resonance
excitation,
which
involves
trade-offs
among
factors
like
quality-factor,
efficiency,
dimensions,
footprint.
In
this
work,
we
experimentally
demonstrate
meta-lens
featuring
Huygens’
bound
states
continuum
(BICs)
its
near-infrared
imaging
application.
All-dielectric
integrated-resonant
unit
particularly
optimized
efficiently
induce
both
quasi-BIC
generalized
Kerker
effect,
while
ensuring
rotation-angle
robustness
generating
geometric
phase.
experimental
results
show
single-layer
possesses
high
quality-factor
104
achieves
transmission
polarization
conversion
efficiency
55%,
exceeding
theoretical
limit
25%.
wavelength-selective
two-dimensional
focusing
are
demonstrated
well.
This
work
will
pave
way
efficient
meta-devices.
Light Science & Applications,
Год журнала:
2024,
Номер
13(1)
Опубликована: Янв. 24, 2024
Diffractive
nonlocal
metasurfaces
have
recently
opened
a
broad
range
of
exciting
developments
in
nanophotonics
research
and
applications,
leveraging
spatially
extended-yet
locally
patterned-resonant
modes
to
control
light
with
new
degrees
freedom.
While
conventional
grating
responses
are
elegantly
captured
by
temporal
coupled
mode
theory,
current
approaches
not
well
equipped
capture
the
arbitrary
spatial
response
observed
nascent
field
metasurfaces.
Here,
we
introduce
spatio-temporal
theory
(STCMT),
capable
capturing
key
features
resonant
wavefront-shaping
This
framework
can
quantitatively
guide
metasurface
design
while
maintaining
compatibility
local
frameworks,
making
it
powerful
tool
rationally
optimize
class
ultrathin
optical
components.
We
validate
this
STCMT
against
full-wave
simulations
various
metasurfaces,
demonstrating
that
offers
semi-analytical
understand
model
physics
functionality
these
devices,
without
need
for
computationally
intense
simulations.
also
discuss
how
may
shed
physical
insights
into
phenomena
photonics
resulting
devices.
As
relevant
example,
showcase
STCMT's
flexibility
applying
study
rapidly
prototype
shape
thermal
emission.
Advances in Optics and Photonics,
Год журнала:
2024,
Номер
16(3), С. 539 - 539
Опубликована: Июнь 4, 2024
Mie-resonant
metaphotonics
is
a
rapidly
developing
field
that
employs
the
physics
of
Mie
resonances
to
control
light
at
nanoscale.
are
excited
in
high-refractive-index
transparent
nanoparticles
and
voids
created
dielectric
media,
they
can
be
used
achieve
wide
range
optical
effects,
including
enhanced
light–matter
interaction,
nonlinear
topological
photonics.
Here,
we
review
recent
advances
metaphotonics,
with
focus
on
their
applications
metasurfaces.
Through
comprehensive
multipolar
analysis,
demonstrate
complex
interplay
electric
magnetic
multipoles
govern
interaction
light.
Recent
have
unveiled
diverse
spectrum
scattering
phenomena
achieved
within
precisely
engineered
structures.
Within
this
framework,
underlying
mechanics
first
second
Kerker
conditions
describe
intricate
mechanisms
guiding
these
nanostructures’
light-scattering
properties.
Moreover,
cover
intriguing
such
as
anapole
bound
or
quasi-bound
states
continuum.
Of
profound
interest
numerous
practical
result
from
revelations.
Ultrafast
processes,
emergence
nanolasers,
advancements
magneto-optic
devices
represent
just
fraction
transformative
applications.
Advanced Materials,
Год журнала:
2024,
Номер
36(18)
Опубликована: Янв. 15, 2024
The
discovery
of
the
topological
transition
in
twisted
bilayer
(tBL)
materials
has
attracted
considerable
attention
nano-optics.
In
analogue
acoustics,
however,
no
such
been
found
due
to
inherent
nondirectional
scalar
property
acoustic
pressure.
this
work,
by
using
a
theory-based
nonlocal
anisotropic
design,
in-plane
pressure
is
transformed
into
spatially
distributed
vector
field
multilayer
metasurfaces.
So-called
"acoustic
magic
angle"-related
phenomena
occur,
as
polariton
hybridization
and
Lifshitz
transition.
dispersion
becomes
flat
at
angle,
enabling
polarized
excitations
propagate
single
direction.
Moreover,
(from
hyperbolic
elliptic
dispersion)
experimentally
observed
for
first
time
twist
angle
continuously
changes.
This
unique
characteristic
facilitates
low-loss
tunable
subwavelength
scale.
A
trilayer
metasurface
also
demonstrated,
more
possibilities
manipulating
waves
are
found.
These
discoveries
not
only
enrich
concepts
moiré
physics
acoustics
but
provide
complete
framework
theory
methodologies
explaining
that
observed.
Nonlocal
effects
originating
from
interactions
between
neighboring
meta-atoms
introduce
additional
degrees
of
freedom
for
peculiar
characteristics
metadevices,
such
as
enhancement,
selectivity,
and
spatial
modulation.
However,
they
are
generally
difficult
to
manipulate
because
the
collective
responses
multiple
meta-atoms.
Here,
we
experimentally
demonstrate
nonlocal
metasurface
realize
modulation
dark-field
emission.
Plasmonic
asymmetric
split
rings
(ASRs)
designed
simultaneously
excite
local
dipole
resonance
quasi-bound
states
in
continuum
spatially
extended
modes.
With
one
type
unit,
tailored
by
varying
array
periods.
ASRs
at
metasurface’s
edge
lack
sufficient
interactions,
resulting
stronger
scattering
thus
emission
properties
metasurface.
Pixel-level
control
is
demonstrated
simply
erasing
some
units,
providing
more
flexibility
than
conventional
metasurfaces.
This
work
paves
way
manipulating
facilitates
applications
optical
trapping
sorting
nanoscale.
