Acta Physica Sinica,
Год журнала:
2024,
Номер
73(23), С. 230304 - 230304
Опубликована: Янв. 1, 2024
<sec>With
the
rapid
development
of
quantum
information
technology,
fully
connected
multi-user
entanglement
distribution
networks
have
received
increasing
attention.
Among
these,
multi-wavelength
light
sources
are
key
devices
for
establishing
connections
between
multiple
users.
Despite
recent
impressive
advances,
there
still
challenges
in
wavelength
number
photon
pairs
due
to
limitations
design
and
fabrication
nonlinear
optical
devices.
The
potentials
silicon
nitride
(Si<sub>3</sub>N<sub>4</sub>)
microring
resonators
(MRRs),
as
scalable
platforms
sources,
explored
this
work.</sec><sec>The
parameters
Si<sub>3</sub>N<sub>4</sub>
MRRs,
including
waveguide
dimension,
resonator
dispersion,
coupling
condition,
comprehensively
analyzed
optimize
photon-pair
generation.
Based
on
these
parameters,
a
MRR
with
free
spectral
range
20
GHz
an
average
quality
factor
1.6
million
is
designed
fabricated.
This
small
can
generate
more
channels
correlated
by
using
same
resources.
high-quality
contributes
enhancement
rate
generating
high
,
which
critical
distribution.
With
continuous-wave
pump
laser,
across
wide
generated
through
spontaneous
four-wave
mixing
(SFWM).
coincidence-to-accidental
ratio
(CAR)
measurements
verify
strong
correlation
pairs,
highlighting
reliability
system
Furthermore,
generation
output
characteristics
quantum-correlated
experimentally
investigated
tunable
bandpass
filter.
results
demonstrate
that
71
wavelength-correlated
within
25.6
nm
successively
shown
Fig.
A.
Our
pave
way
developing
platform,
thereby
advancing
networks.</sec>
Advanced Materials,
Год журнала:
2024,
Номер
36(23)
Опубликована: Март 13, 2024
Abstract
Quantum
light
sources
are
essential
building
blocks
for
many
quantum
technologies,
enabling
secure
communication,
powerful
computing,
and
precise
sensing
imaging.
Recent
advancements
have
witnessed
a
significant
shift
toward
the
utilization
of
“flat”
optics
with
thickness
at
subwavelength
scales
development
sources.
This
approach
offers
notable
advantages
over
conventional
bulky
counterparts,
including
compactness,
scalability,
improved
efficiency,
along
added
functionalities.
review
focuses
on
recent
advances
in
leveraging
flat
to
generate
Specifically,
generation
entangled
photon
pairs
through
spontaneous
parametric
down‐conversion
nonlinear
metasurfaces,
single
emission
from
emitters
dots
color
centers
3D
2D
materials
explored.
The
covers
theoretical
principles,
fabrication
techniques,
properties
these
sources,
particular
emphasis
enhanced
engineering
using
optical
resonances
supported
by
nanostructures.
diverse
application
range
is
discussed
current
challenges
perspectives
field
highlighted.
Indistinguishability
of
identical
particles
is
a
resource
for
quantum
information
processing
and
has
been
utilized
to
generate
entanglement
from
independent
that
spatially
overlap
only
at
the
detection
stage.
Here,
we
introduce
controllable
scheme
capable
generating
via
three
steps,
i.e.,
initialization,
deformation,
postselection,
different
classes
multipartite
entangled
states
starting
product
state
N
distinguishable
qubits.
While
our
generalizable
any
class
bosonic
fermionic
systems,
provide
an
explicit
recipe
generation
W,
Dicke,
GHZ,
cluster
states,
which
are
processing.
Using
graph-based
representations
within
framework
localized
operations
classical
communication
(sLOCC),
mathematically
demonstrate
direct
translation
schemes
specific
into
colored,
complex,
weighted
digraphs,
each
corresponding
given
experimental
setup.
We
also
show
this
graph-theoretical
approach
allows
optimization
efficiency
by
exploring
variety
schemes.
The
presented
theoretical
approach,
while
already
implementable
with
current
linear
optics
architectures,
potential
bring
clear
advantages
over
existing
technologies,
such
as
in
computing
search
algorithms
design
new
experiments
or
other
platforms.
Published
American
Physical
Society
2024
Laser & Photonics Review,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Abstract
Single‐photon
source
is
the
cornerstone
for
modern
quantum
information
processing.
The
present
work
derives
theoretical
limit
of
single‐photon
purity
general
parametric
heralded
sources
,
and
subsequently
demonstrates
a
bright,
gigahertz‐pulsed
with
saturating
limit.
By
stimulating
spontaneous
four‐wave
mixing
effect
in
silicon
spiral
waveguide,
this
on‐chip
measured
to
have
coincidence
rate
exceeding
1.5
MHz
at
coincidence‐to‐accidental
ratio
(CAR)
16.77
photon
pair
correlation
experiment.
source,
quantified
by
auto‐correlation
function
Hanbury
Brown–Twiss
setup
reach
lowest
value
obtained
0.8
kHz
CAR
2220.
performance
improvements
are
attributed
effective
spectral
filtering
suppressing
noise
as
well
coherent
pump
condition
helped
optical
injection
locking.
reported
results
provide
reliable
standard
benchmarking
state‐of‐the‐art
Applied Physics Reviews,
Год журнала:
2025,
Номер
12(1)
Опубликована: Март 1, 2025
As
photonic
technologies
grow
in
multidimensional
aspects,
integrated
photonics
holds
a
unique
position
and
continuously
presents
enormous
possibilities
for
research
communities.
Applications
include
data
centers,
environmental
monitoring,
medical
diagnosis,
highly
compact
communication
components,
with
further
growing.
Herein,
we
review
state-of-the-art
on-chip
sensors
that
operate
the
visible
to
mid-infrared
wavelength
region
on
various
material
platforms.
Among
different
materials,
architectures,
leading
way
sensors,
discuss
optical
sensing
principles
are
commonly
applied
biochemical
gas
sensing.
Our
focus
is
passive
waveguides,
including
dispersion-engineered
metamaterial-based
structures,
which
essential
enhancing
interaction
between
light
analytes
chip-scale
sensors.
We
harness
diverse
array
of
cutting-edge
technologies,
heralding
revolutionary
paradigm.
arsenal
includes
refractive-index-based
sensing,
plasmonics,
spectroscopy,
forge
an
unparalleled
foundation
innovation
precision.
Furthermore,
brief
discussion
recent
trends
computational
concepts,
incorporating
Artificial
Intelligence
&
Machine
Learning
(AI/ML)
deep
learning
approaches
over
past
few
years
improve
qualitative
quantitative
analysis
sensor
measurements.
Applied Optics,
Год журнала:
2024,
Номер
63(16), С. 4465 - 4465
Опубликована: Май 13, 2024
This
paper
introduces
a
tunable
and
high-quality
photon
source
that
utilizes
evanescent-wave
coupling
phase
matching.
By
adjusting
the
gap,
signal
light
can
be
tuned
from
1307
nm
to
1493.9
nm,
idler
1612.8
1907
nm.
Throughout
entire
tuning
range,
purity
of
pairs
remains
above
92%.
In
specific
ranges
(signal
photons
1421.7
1706.4
nm),
exceeds
99%
full
width
at
half-maximum
generated
spectra
is
less
than
1.85
The
designed
using
silicon–organic
hybrid
waveguide,
which
effectively
minimizes
impact
two-photon
absorption
achieves
15
dB
enhancement
in
four-wave
mixing
conversion
efficiency
compared
strip
waveguide.
design
may
promote
efficient
precise
generation
desired
frequencies,
offering
promising
potential
for
various
applications
quantum
technologies.
