Continuous spectral and coupling-strength encoding with dual-gradient metasurfaces
Nature Nanotechnology,
Год журнала:
2024,
Номер
19(12), С. 1804 - 1812
Опубликована: Авг. 26, 2024
Abstract
To
control
and
enhance
light–matter
interactions
at
the
nanoscale,
two
parameters
are
central:
spectral
overlap
between
an
optical
cavity
mode
material’s
features
(for
example,
excitonic
or
molecular
absorption
lines),
quality
factor
of
cavity.
Controlling
both
simultaneously
would
enable
investigation
systems
with
complex
features,
such
as
multicomponent
mixtures
heterogeneous
solid-state
materials.
So
far,
it
has
been
possible
only
to
sample
a
limited
set
data
points
within
this
two-dimensional
parameter
space.
Here
we
introduce
nanophotonic
approach
that
can
continuously
encode
quality-factor
space
compact
spatial
area.
We
use
dual-gradient
metasurface
design
composed
array
smoothly
varying
subwavelength
nanoresonators,
each
supporting
unique
based
on
symmetry-protected
bound
states
in
continuum.
This
results
27,500
distinct
modes
density
approaching
theoretical
upper
limit
for
metasurfaces.
By
applying
our
platform
surface-enhanced
spectroscopy,
find
optimal
maximum
sensitivity
depends
amount
analyte,
enabling
effective
detection
regardless
analyte
concentration
single
metasurface.
Our
provides
method
analyse
complete
coupling-strength
material
applications
photocatalysis,
chemical
sensing
entangled
photon
generation.
Язык: Английский
The Road to Commercializing Optical Metasurfaces: Current Challenges and Future Directions
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 15, 2025
Optical
metasurfaces,
components
composed
of
artificial
nanostructures,
are
recognized
for
pushing
boundaries
wavefront
manipulation
while
maintaining
a
lightweight,
compact
design
that
surpasses
conventional
optics.
Such
advantages
align
with
the
current
trends
in
optical
systems,
which
demand
communication
devices
and
immersive
holographic
projectors,
driving
significant
investment
from
industry.
Although
interest
commercialization
metasurfaces
has
steadily
grown
since
initial
breakthrough
diffraction-limited
focusing,
their
practical
applications
have
remained
limited
by
challenges
such
as,
massive-production
yield,
absence
standardized
evaluation
methods,
constrained
methodology.
Here,
this
Perspective
addresses
particularly
focused
on
mass
production,
fabrication
tolerance,
performance
evaluation,
integration
into
commercial
systems.
Additionally,
we
select
fields
where
may
soon
play
roles
provide
perspective
potentials.
By
addressing
exploring
solutions,
aims
to
foster
discussions
will
accelerate
utilization
further
build
near-future
metaphotonics
platforms.
Язык: Английский
Selective Excitation of Bloch Modes in Canalized Polaritonic Crystals
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 22, 2025
Abstract
Polaritonic
crystals
(PoCs)
have
experienced
significant
advancements
through
involving
hyperbolic
polaritons
in
anisotropic
materials
such
as
α‐MoO
3
,
offering
a
promising
approach
for
nanoscale
light
control
and
improved
light‐matter
interactions.
Notably,
twisted
bilayer
enables
tunable
iso‐frequency
contours
(IFCs),
especially
generating
flat
IFCs
at
certain
twist
angles,
which
can
enhance
mode
selectivity
their
PoCs
the
highly
collimated
canalized
polaritons.
This
study
unveils
selective
excitation
of
Bloch
modes
with
square‐lattice
structures
on
.
Through
optimization
design,
there
is
an
effective
redistribution
into
reciprocal
lattices
PoCs.
Fine‐tuning
periodicity
orientation
hole
lattice
momentum
matching
between
co‐linear
points,
allowing
precise
directional
over
desired
Bragg
resonances
modes.
research
establishes
versatile
platform
polaritonic
devices
paves
way
advanced
photonic
applications.
Язык: Английский
Superchiral Light Emerging from Bound States in the Continuum in Metasurfaces of Si Nanorod Dimers
ACS Photonics,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 3, 2024
Bound
states
in
the
continuum
(BICs)
all-dielectric
metasurfaces
enhance
light-matter
interaction
at
nanoscale
due
to
their
infinite
Язык: Английский
All-dielectric structural coloration empowered by bound states in the continuum
Nanophotonics,
Год журнала:
2024,
Номер
13(23), С. 4327 - 4335
Опубликована: Окт. 4, 2024
The
technological
requirements
of
low-power
and
high-fidelity
color
displays
have
been
instrumental
in
driving
research
into
advanced
coloration
technologies.
At
the
forefront
these
developments
is
implementation
dye-free
approaches,
which
overcome
previous
constraints
related
to
resolution
fading.
Resonant
dielectric
nanostructures
emerged
as
a
promising
paradigm,
showing
great
potential
for
high
efficiency,
saturation,
wide
gamut
palette,
image
reproduction.
However,
they
still
face
limitations
accuracy,
purity,
simultaneous
brightness
tunability.
Here,
we
demonstrate
an
all-dielectric
metasurface
empowered
by
photonic
bound
states
continuum
(BICs),
supports
sharp
resonances
throughout
visible
spectral
range,
ideally
suited
producing
range
structural
colors.
design
consists
TiO
Язык: Английский