Time-varying Mie resonators for real-time manipulation of quantum emitter radiation
Physical review. B./Physical review. B,
Journal Year:
2025,
Volume and Issue:
111(12)
Published: March 26, 2025
Language: Английский
Electrostatic Orientation of Optically Asymmetric Janus Particles
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(50), P. 49172 - 49187
Published: Nov. 28, 2024
Janus
micro-
and
nanoparticles,
featuring
unique
dual-interface
designs,
are
at
the
forefront
of
rapidly
advancing
fields
such
as
optics,
medicine,
chemistry.
Accessible
control
over
position
orientation
particles
within
a
cluster
is
crucial
for
unlocking
versatile
applications,
including
targeted
drug
delivery,
self-assembly,
nanomotors,
asymmetric
imaging.
Nevertheless,
precise
mechanical
manipulation
remains
significant
practical
challenge
across
these
fields.
The
current
predominant
methods,
based
on
fluid
flow,
thermal
gradients,
or
chemical
reactions,
have
their
precision
applicability
limited
by
properties
background
fluids.
Therefore,
this
study
proposes
electrostatics
to
deliberately
local
optically
(spherical
matchstick-like
hybrid
metal–dielectric
objects)
overcome
aforementioned
restraints.
We
introduce
sophisticated
multiphysics
platform
employ
it
explore
unveil
infrastructural
physics
behind
behavior
when
subjected
electrostatic
stimuli
in
an
ionic
environment.
investigate
how
different
deterministic
stochastic
variables
affect
particles'
short-
long-term
responses.
By
judicious
engineering
amplitude,
direction,
polarization
external
excitation,
we
demonstrate
that
tend
undergo
desired
rotational
motion
converge
favorable
orientations.
functionality
our
approach
showcased
context
imaging
system
particles.
Our
findings
suggest
viable
adequate
pave
way
enabling
numerous
state-of-the-art
applications
various
Language: Английский
Dynamic Scattering‐Channel‐Based Approach for Multiuser Image Encryption
Advanced Theory and Simulations,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 6, 2024
Abstract
Conventional
scattering‐based
encryption
systems
that
operate
based
on
a
static
complex
medium
which
is
used
by
all
users
are
vulnerable
to
learning‐based
attacks
exploit
ciphertext‐plaintext
pairs
model
and
reverse‐engineer
the
scattering
medium's
response,
enabling
unauthorized
decryption
without
physical
medium.
In
this
contribution,
new
dynamic
scattering‐channel‐based
technique
for
multiuser
image
developed.
The
established
approach
employs
variable,
media
modeled
as
tunable
aggregates
of
multiple
nanoparticles.
proposed
system
supports
allowing
distinct
combinations
matrices
different
time
blocks,
each
combined
with
user‐specific
complex‐valued
coefficients,
creation
unique,
hard‐to‐guess
keys
user.
derived
methodology
enhances
practical
feasibility
secure
communication
storage
channels
employing
mechanism.
Language: Английский