Ultra-Narrowband Circular Dichroism in Chiral Nanopore Arrays Based on Bound States in the Continuum: Implications for Ultrasensitive Detection of Chiral Molecules
ACS Applied Nano Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Narrow-band
(UN)
circular
dichroism
(CD)
is
important
in
the
fields
of
chiral
molecular
sensing,
negatively
refractive
materials,
and
polarization-resolved
imaging.
However,
designing
structures
with
strong,
ultra
UN,
dynamically
tunable
CD
spectra
remains
challenging.
In
this
paper,
bound
states
continuum
(BICs)
magneto-optical
(MO)
materials
are
introduced
into
nanopores,
hexagonal
nanopore
arrays
(HCNAs).
The
simulation
results
show
that
HCNAs
generate
two
UN
signals
infrared
band
when
structural
symmetry
broken
by
introducing
perturbation.
intensities
can
be
considerably
enhanced
adjusted
an
external
magnetic
field
applied.
enhancing
mechanism
explained
quantum
optical
models,
electric
field,
current
distributions
HCNAs.
By
altering
geometrical
characteristics
HCNAs,
impacts
various
parameters
on
were
discussed.
addition,
sensing
properties
for
ambient
index
molecules
evaluated,
figure
merit
(FOM)
reach
23,398.
These
aid
developing
sensor
systems
provide
opportunities
signals.
This
signal
high
amplitude
ultranarrow
bandwidth
provides
good
application
prospects
ultrasensitive
detection
molecules.
Язык: Английский
Metasurface-enhanced biomedical spectroscopy
Nanophotonics,
Год журнала:
2025,
Номер
14(8), С. 1045 - 1068
Опубликована: Янв. 17, 2025
Abstract
Enhancing
the
sensitivity
of
biomedical
spectroscopy
is
crucial
for
advancing
medical
research
and
diagnostics.
Metasurfaces
have
emerged
as
powerful
platforms
enhancing
various
spectral
detection
technologies.
This
capability
arises
from
their
unparalleled
ability
to
improve
interactions
between
light
matter
through
localization
enhancement
fields.
In
this
article,
we
review
representative
approaches
recent
advances
in
metasurface-enhanced
spectroscopy.
We
provide
a
comprehensive
discussion
technologies
enhanced
by
metasurfaces,
including
infrared
spectroscopy,
Raman
fluorescence
other
modalities.
demonstrate
advantages
metasurfaces
improving
sensitivity,
reducing
limits,
achieving
rapid
biomolecule
while
discussing
challenges
associated
with
design,
preparation,
stability
procedures.
Finally,
explore
future
development
trends
biological
emphasize
wide-ranging
applications.
Язык: Английский
Bottom–Up Metasurfaces for Biotechnological Applications
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
Abstract
Metasurfaces
are
the
2D
counterparts
of
metamaterials,
and
their
development
is
accelerating
rapidly
in
past
years.
This
progress
enables
creation
devices
capable
uniquely
manipulating
light,
with
applications
ranging
from
optical
communications
to
remote
biosensing.
engineered
by
rational
assembly
subwavelength
elements,
defined
as
meta‐atoms,
giving
rise
unique
physical
properties
arising
collective
behavior
meta‐atoms.
These
meta‐atoms
typically
organized
using
effective,
reproducible,
precise
nanofabrication
methods
that
require
a
lot
effort
achieve
scalable
cost‐effective
metasurfaces.
In
contrast,
bottom–up
based
on
colloidal
nanoparticles
(NPs)
have
developed
last
decade
fascinating
alternative
for
technological
spread
The
present
review
takes
stock
recent
advances
fabrication
hybrid
metasurfaces
prepared
bottom‐up
methods,
resulting
disordered
particular,
plasmonic
NPs
emphasized
multifold
applications,
which
discussed
biotechnology
perspective.
However,
some
examples
merging
top–down
approaches
also
described.
Finally,
leveraging
historical
metasurface
evolution,
draws
new
perspectives
random
design
applications.
Язык: Английский
Unidirectional Chiral Emission via Twisted Bi-layer Metasurfaces
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Ноя. 12, 2024
Controlling
and
channeling
light
emissions
from
unpolarized
quantum
dots
into
specific
directions
with
chiral
polarization
remains
a
key
challenge
in
modern
photonics.
Stacked
metasurface
designs
offer
potential
compact
solution
for
chirality
directionality
engineering.
However,
experimental
observations
of
directional
radiation
resonant
metasurfaces
emitters
remain
obscure.
In
this
paper,
we
present
unidirectional
emission
twisted
bi-layer
via
multi-dimensional
control,
including
twist
angle,
interlayer
distance,
lateral
displacement
between
the
top
bottom
layers,
as
enabled
by
doublet
alignment
lithography
(DAL).
First,
maintaining
alignment,
demonstrates
intrinsic
optical
near-unity
circular
dichroism
0.94
reflectance
difference
74%,
where
high
greater
than
0.9
persists
across
wide
range
angles
−11
to
11
degrees.
Second,
engineered
induces
resonance,
resulting
deposited
onto
metasurface.
Our
universal
platform
efficient
manipulation
over
angular
range,
promising
applications
miniaturized
lasers,
grating
couplers,
nanoantennas.
Simultaneous
control
direction
using
photonic
nanostructures
is
long-standing
Here,
authors
experimentally
demonstrate
bilayer
control.
Язык: Английский
Strategical deep learning for customized circular dichroism through chiral quasi-bound states in the continuum
Optics & Laser Technology,
Год журнала:
2025,
Номер
184, С. 112500 - 112500
Опубликована: Янв. 21, 2025
Язык: Английский
Dual‐Band Quasi‐Bound States in the Continuum with Opposite Circular Dichroism Supported by Single Metallic Bilayer Twisted Metasurface
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Abstract
The
field
of
optical
chirality
has
achieved
remarkable
progress
with
the
quick
development
artificial
metasurfaces.
introduction
quasi‐bound
states
in
continuum
(QBIC)
into
chiral
devices
offers
a
groundbreaking
and
efficient
method
for
modulating
responses.
However,
existing
QBIC‐based
research
primarily
concentrates
on
dielectric
structures
also
encounters
challenges
such
as
complex
design
requirements
limitations
to
single‐frequency
band
operation.
In
this
work,
metallic
double‐layer
twisted
metasurface
is
proposed.
By
manipulating
single
degree
freedom
(DOF),
twist
angle,
QBIC
are
simultaneously
induced
at
two
frequency
bands.
Far‐field
multipole
decomposition
near‐field
analysis
reveal
that
QBICs
originated
from
electric
dipole
toroidal
moments.
Experimental
spectra
highly
agree
simulation
results,
confirming
efficacy
design.
Remarkably,
structure
exhibits
opposite
responses
different
To
highlight
device's
superiority,
dynamic
image
display
switched
by
or
polarization
state
demonstrated
simulation.
proposed
holds
potential
applications
enantiomer
sensing,
lasers,
nonlinear
filtering,
other
related
areas.
Язык: Английский
Chirality Quantification for High‐Performance Nanophotonic Biosensors
Small Methods,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 8, 2025
Abstract
Recent
advancements
in
chiral
metabolomics
have
facilitated
the
discovery
of
disease
biomarkers
through
enantioselective
measurement
metabolites,
offering
new
opportunities
for
diagnosis,
prognosis,
and
personalized
medicine.
Although
photonic
nanomaterials
emerged
as
promising
platforms
biosensing,
enhancing
sensitivity
enabling
detection
biomolecules
at
extremely
low
concentrations,
a
deeper
understanding
relationship
between
structural
optical
chirality
is
crucial
optimizing
these
platforms.
This
perspective
examines
recent
methods
quantifying
chirality,
including
Hausdorff
Chirality
Measure
(HCM),
Continuous
(CCM),
Osipov‐Pickup‐Dunmur
(OPD),
Graph‐Theoretical
(GTC)
measure.
These
approaches
advanced
both
materials
biomolecules,
well
its
correlation
with
responses.
work
emphasizes
role
quantification
improving
biosensor
performance
explores
potential
near‐field
chiroptical
studies
to
enhance
sensor
capabilities.
Finally,
this
addresses
key
challenges
outline
future
research
directions
advancing
biosensors,
focus
on
nano‐bio
interface
interactions
drive
development
next‐generation
sensing
technologies.
Язык: Английский
Recent progresses and applications on chiroptical metamaterials : a review
Journal of Physics D Applied Physics,
Год журнала:
2024,
Номер
57(49), С. 493004 - 493004
Опубликована: Авг. 14, 2024
Abstract
Chiroptical
metamaterials
have
attracted
considerable
attention
owing
to
their
exciting
opportunities
for
fundamental
research
and
practical
applications
over
the
past
20
years.
Through
designs,
chiroptical
response
of
chiral
can
be
several
orders
magnitude
higher
than
that
natural
materials.
therefore
represent
a
special
type
artificial
structures
unique
activities.
In
this
review,
we
present
comprehensive
overview
progresses
in
development
metamaterials.
metamaterial
progress
enables
applications,
including
asymmetric
transmission,
polarization
conversion,
absorber,
imaging,
sensor
emission.
We
also
review
fabrication
techniques
design
based
on
deep
learning.
conclusion,
possible
further
directions
field.
Язык: Английский
Stretchable terahertz metasurface based on laser induced graphene for contactless deformation sensing
Optics Express,
Год журнала:
2024,
Номер
32(17), С. 29740 - 29740
Опубликована: Июль 29, 2024
In
this
paper,
a
1D
stretchable
terahertz
(THz)
metasurface
based
on
laser-induced
graphene
(LIG)
for
deformation
sensing
is
developed
with
low
cost,
good
sensitivity
and
robustness.
After
the
LIG
fabricated
by
laser-direct
writing
polyimide
film,
it
divided
into
columns
bonded
to
medical
polyurethane
(PU)
tape,
thus
endowed
high
elasticity
due
excellent
flexibility
of
PU.
Because
supports
surface
plasmon
polaritons
in
THz
band,
plasmonic
resonance
introduced
reflection
spectrum
red
shifts
lateral
stretching.
Experimental
results
show
that
device
can
realize
resonant
frequency
shift
336
GHz
at
0-14
mm,
linearity
reaches
0.988,
achieving
24
GHz/mm
robustness
(>1000
repetitions).
The
LIG-based
sensor
has
great
application
potential
contactless
aerospace,
industrial
manufacturing,
related
fields.
Язык: Английский
Reconfigurable metasurface for circular dichroism and polarization converter
Jiu‐sheng Li,
Dan Wang,
Ri-hui Xiong
и другие.
Optical Materials Express,
Год журнала:
2024,
Номер
14(11), С. 2612 - 2612
Опубликована: Окт. 14, 2024
We
propose
a
photosensitive
silicon
terahertz
reconfigurable
metasurface
composed
of
substrate,
benzocyclobutene
dielectric
layer,
U-shaped
rod
and
metal
open
square
ring
layer.
When
the
conductivity
is
σ
Si
=
5
×
10
S/m,
exhibits
strong
circular
dichroism
under
incidence
circularly
polarized
wave,
with
(CD)
value
as
high
1
at
frequency
4.03
THz.
At
this
time,
linearly
wave
incidence,
linear
dichroism,
(LD)
values
0.71,
-0.57,
0.33
frequencies
6.76
THz,
7.45
8.39
respectively.
While
4
displays
circular-circular
polarization
converter,
conversion
rate
(PCR)
more
than
0.9
in
2.92-6.04
THz
2.94-5.68
band.
Язык: Английский