Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
Abstract
Chiral
plasmonic
nanoantennas
exhibit
unique
chiroptical
properties
in
both
the
near‐field
and
far‐field,
offering
exciting
opportunities
for
applications
sensing,
circularly
polarized
luminescence,
quantum
communication.
Recent
advances
chiral
plasmonics
have
facilitated
creation
of
nanoparticles
with
intrinsic
chirality
at
single‐particle
level.
However,
far‐field
directionality
these
is
not
well
understood.
In
this
work,
A
numerical
study
conducted
on
a
single
nanoantenna
that
undergoes
size‐preserving
compression,
transitioning
from
straight
nanorod
to
left‐
or
right‐handed
helices
varying
pitches.
These
nanostructures
showcase
distinct
mode‐dependent
properties,
encompassing
positive
negative
dissymmetry
factors,
3D
power
radiation
patterns,
angular
distribution
circular
polarization,
under
plane‐wave
point‐source
excitations.
The
findings
provide
new
insights
into
angle‐resolved
spectroscopies
intrinsically
controlling
light
emission
nanophotonics.
Analytical Chemistry,
Год журнала:
2024,
Номер
97(1), С. 319 - 327
Опубликована: Дек. 21, 2024
The
investigation
of
plasmonic
chirality
is
a
profound
and
intriguing
topic,
the
distinctive
morphology
intrinsically
chiral
nanoparticles
has
prompted
significant
interest
in
structure–activity
relationship
between
particle
chirality.
In
this
work,
anisotropic
etching
helical
gold
nanorods
(HGNRs)
by
cetyltrimethylammonium
bromide
(CTAB)–HAuCl4
complex
was
observed
with
an
interesting
bidirectional
variation
intrinsic
that
initially
enhanced
subsequently
weakened,
which
related
diversity
CTAB
distribution.
addition,
ultrasensitive
convenient
sensing
platform
for
acetylcholinesterase
developed
based
on
circular
dichroism
signal
recovery
HGNRs
caused
dual
inhibition
HGNR
etching.
process
mechanism
offer
new
insights
into
understanding
structural
features
biochemical
applications
chirality,
could
be
applied
to
acquisition
sensitive
detection
changes.
Physica Scripta,
Год журнала:
2024,
Номер
99(6), С. 065403 - 065403
Опубликована: Апрель 17, 2024
Abstract
We
investigate
the
electromagnetic
chirality
and
negative
refraction
in
a
concentric
nanoshell
of
chiral
metal
sphere
atomic
shell.
The
medium
shell
with
four-level
system
is
driven
by
laser
field
an
incoherent
pump
diamond
configuration.
show
that
electric
magnetic
absorption
spectra
connecting
through
coefficients
respective
dipole
moments
two
media,
produce
five
three
lines
spectral
profiles.
explain
separated
dips
are
manifestation
classical
(quantum)
coherence
effect
wave
excitation
(atomic
shell),
interaction
at
interface
media.
Furthermore,
we
zero
without
requiring
permittivity
(
ϵ
)
permeability
μ
simultaneously
negative,
where
for
all
values
incident
wavelength,
Re
[
]
≈
1,
representing
strong
behavior.
Consequently,
refractive
index
enhances
sufficiently
beyond
n
=
−1
wide
range
parameters
depending
on
coupling
parameters,
coefficients,
radii
ratio
metal-atomic
nanoshell.
Nanomaterials,
Год журнала:
2024,
Номер
14(8), С. 705 - 705
Опубликована: Апрель 18, 2024
Manipulating
plasmonic
chirality
has
shown
promising
applications
in
nanophotonics,
stereochemistry,
sensing,
and
biomedicine.
However,
to
reconfigure
chirality,
the
strategy
of
constructing
chiral
systems
with
a
tunable
morphology
is
cumbersome
complicated
apply
for
integrated
devices.
Here,
we
present
simple
effective
method
that
can
also
manipulate
control
light-matter
interactions
only
via
strong
coupling
between
nanoparticles
excitons.
This
paper
presents
plexcitonic
system
consisting
L-shaped
nanorod
dimers
achiral
molecule
The
circular
dichroism
(CD)
spectra
our
strong-coupling
be
calculated
by
finite
element
simulations.
We
found
formation
plexcitons
significantly
modulate
CD
spectra,
including
appearance
new
hybridized
peaks,
double
Rabi
splitting,
bisignate
anti-crossing
behaviors.
phenomenon
explained
extended
coupled-mode
theory.
Moreover,
explored
this
enantiomer
ratio
sensing
using
properties
spectra.
linear
dependence
on
ratio.
Our
work
provides
facile
efficient
nanosystems,
deepens
understanding
facilitates
development
devices
sensing.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 18, 2024
Abstract
Strong
coupling
between
light
and
matter
can
lead
to
the
formation
of
hybrid
eigenstates,
such
as
exciton-polaritons,
enriching
our
understanding
manipulation
quantum
phenomena
across
various
fields
science
technology.
While
plasmonic
metal
nanoparticles
are
recognized
effective
optical
resonators
for
generating
polaritons,
most
research
date
has
been
focused
on
Au
nanorods,
potential
cubic
approach
layering
emitters
particle
surfaces
have
not
extensively
investigated
in
this
field.
This
paper
presents
findings
strong
observed
molecular
J-aggregates.
Our
results
suggest
that
strength
be
tuned
by
adjusting
geometric
material
properties
nanoparticles,
evidenced
spectral
splitting,
anti-crossing
dispersion
relations,
fulfillment
criteria.
To
further
enhance
plasmon-exciton
coupling,
we
introduced
a
layer-by-layer
modification
maximal
enhancement
approximately
19%
double
layers
Simulations
interlayer
thickness-dependent
splitting
corroborate
these
results,
providing
deeper
effects
emitter
coupling.
The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(28), С. 11942 - 11951
Опубликована: Июль 9, 2024
Plasmon-enhanced
catalysis
is
a
process
that
significantly
depends
on
the
strong
electromagnetic
fields
generated
near
photocatalyst
surface.
These
are
closely
related
to
structure
and
composition
of
metallic
nanostructure.
In
this
study,
we
present
synthesis
quaternary
(Au,
Ag,
Pd,
Pt)
nanostructures
with
an
innovative
hybrid
design
features
solid
core
multiple
hollow
frame
compartments.
Initially,
AuPtAg
nanocrystals
created,
followed
by
transformation
Ag
component
into
Pd-based
nanoframes
through
galvanic
replacement
reaction.
The
integration
both
elements
within
unified
structure,
along
presence
plasmonic
metals
(Au/Ag)
catalytic
(Pd/Pt),
results
in
broadband
absorption
across
visible
spectrum
promising
use
plasmon-enhanced
catalysis.
particular,
significant
enhancement
conversion
rate
under
UV–vis
light
irradiation
achieved
when
material
used
as
for
reduction
4-nitrophenol.
Finite-difference
time-domain
simulation
suggests
combination
components
single
intensifies
near-surface
fields.
This
research
introduces
viable
synthetic
strategy
creating
multimetallic
elements.
offers
valuable
insights
precise
engineering
advanced
photocatalysts
applications.
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
Abstract
Chiral
plasmonic
nanoantennas
exhibit
unique
chiroptical
properties
in
both
the
near‐field
and
far‐field,
offering
exciting
opportunities
for
applications
sensing,
circularly
polarized
luminescence,
quantum
communication.
Recent
advances
chiral
plasmonics
have
facilitated
creation
of
nanoparticles
with
intrinsic
chirality
at
single‐particle
level.
However,
far‐field
directionality
these
is
not
well
understood.
In
this
work,
A
numerical
study
conducted
on
a
single
nanoantenna
that
undergoes
size‐preserving
compression,
transitioning
from
straight
nanorod
to
left‐
or
right‐handed
helices
varying
pitches.
These
nanostructures
showcase
distinct
mode‐dependent
properties,
encompassing
positive
negative
dissymmetry
factors,
3D
power
radiation
patterns,
angular
distribution
circular
polarization,
under
plane‐wave
point‐source
excitations.
The
findings
provide
new
insights
into
angle‐resolved
spectroscopies
intrinsically
controlling
light
emission
nanophotonics.
