Nanomaterials,
Год журнала:
2025,
Номер
15(6), С. 451 - 451
Опубликована: Март 16, 2025
Recently,
the
merging
of
accidental
bound
states
in
continuum
(BICs)
has
attracted
significant
attention
due
to
enhanced
light–matter
interactions.
Here,
we
theoretically
demonstrate
BICs
perturbed
all-silicon
terahertz
photonic
crystal
(PhC)
slabs
with
C2
and
broken-symmetry
structures.
The
PhC
consist
an
array
four
cylindrical
holes
support
a
TM
symmetry
protected
(SP)
vector
BIC
at
Γ
point.
Our
results
indicate
that
band
transition
can
be
achieved
by
varying
diameter
diagonal
C2-symmetry
structure.
Notably,
slab,
SP
will
first
convert
quasi-BIC,
then
transit
new
BIC,
which
are
well
displayed
interpreted
tracing
momentum
space.
We
believe
presented
this
work
show
potential
for
design
application
both
symmetric
asymmetric
slabs.
Applied Physics Reviews,
Год журнала:
2025,
Номер
12(1)
Опубликована: Март 1, 2025
Bound
states
in
the
continuum
(BICs)
have
emerged
as
research
hotspots
optics
and
photonics,
offering
a
new
paradigm
for
achieving
extreme
field
localization
enhancing
light–matter
interactions.
Here,
we
establish
first
time
intrinsic
evolution
laws
of
Fabry–Pérot
bound
(FP-BICs),
revealing
that
Q
factor
is
inversely
proportional
to
square
phase/frequency
detuning
nonradiative
decay
rate,
enabling
directional
engineering
FP-BIC
resonances.
We
propose
an
all-dielectric
multilayer
film
metasurface
create
optical
resonator
its
perfectly
mirrored
counterpart,
inducing
FP-BICs
validating
conclusions.
experimentally
demonstrated
with
frequency
detuning,
maximum
610
visible.
Our
work
offers
novel
insights
into
BICs,
promising
inspire
exotic
phenomena
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 27, 2025
Abstract
Optical
cryptography
leveraging
responsive
photonics
harbors
immense
potential
within
encryption
markets.
Nonetheless,
the
current
reliance
on
single
inherent
information
encryption/decryption
methods
hinders
advancements
in
achieving
high‐precision
and
multistage
data
security,
particularly
for
military‐grade
encryption.
Here,
a
water‐triggered
decryption
approach
visible
regime
is
proposed,
exploiting
precise
dynamic
regulation
of
quasi‐bound
states
continuum
(q‐BIC)
hydrogel
metagratings.
By
exploring
thermal
interactions
between
scanning
probe
hydrogels,
direct
one‐step
grayscale
patterning
hydrogels
has
been
realized,
allowing
flexible
design
delicate
1D
1.5D
Utilizing
mechanism,
sensitive
q‐BIC
resonance
can
be
switched
among
ON,
OFF,
intermediate
depending
humidity
levels,
thus
facilitating
optical
through
properties
hydrogels.
Finally,
Morse
code
designed
achieved
by
arranging
metagratings,
which
concealed
under
water
immersion.
During
process
(from
high
to
low
humidity),
active
shifting
camouflaged
enhance
security.
The
strategy,
along
with
patterning,
offers
promising
platform
encryption,
security
labels,
displays,
anti‐counterfeiting
measures.
