IEEE photonics journal,
Journal Year:
2024,
Volume and Issue:
16(2), P. 1 - 7
Published: Jan. 11, 2024
A
lithium
niobate
thin-film(LNTF)
electro-optic
modulator(EOM)
with
segmented
electrode
structure
is
investigated,
and
the
influence
of
modulator's
structural
configuration
on
its
performance
achieved.
In
contrast
to
conventional
couplers,
design
incorporates
a
2x2
S-shaped
directional
coupler.
Our
modulator
achieves
bandwidth
nearly
110
GHz
half-wave
voltage
1.45
Vcm.
comparative
analysis
between
two
configurations:
one
SiO
2
cladding
covering
entire
surface
other
coverage
limited
gaps,
which
reveals
latter
potential
for
enhancing
device
performance.
The
accuracy
simulation
results
substantiated
through
both
software
theoretical
calculations.
provide
valuable
insights
LNTF
EOM,
highlighting
efficacy
proposed
structure.
Abstract
Hyperuniform
disordered
solids
(HUDS)
waveguides,
a
type
of
emerging
artificial
photonic
bandgap
(PBG)
devices,
are
demonstrated
to
possess
large,
complete,
and
isotropic
PBGs,
being
promising
for
developing
applications
in
optoelectronics,
nonlinear
optics,
sensing.
However,
optical
losses
HUDS
waveguides
usually
limited
by
giant
light
scattering
from
the
irregular
distribution
cells.
Herein,
waveguide
devices
with
low
large
PBGs
exploring
morphology‐engineering
wall‐network‐regulation
method
structures.
The
results
show
that
proposed
device
can
achieve
3.0
dB
transmittance
improvement
36‐µm‐long
silicon
waveguide.
Based
on
structure,
waveguide‐coupled
HUDS‐cladding
nanocavity
is
also
quality
factor
≈70
at
2.250
µm
wavelengths
theoretical
refractive
index
sensitivity
446
nm
RIU
−1
.
study
opens
an
avenue
develop
intriguing
on‐chip
applications.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(25)
Published: June 21, 2023
Analog
optical
and
electronic
hardware
has
emerged
as
a
promising
alternative
to
digital
electronics
improve
the
efficiency
of
deep
neural
networks
(DNNs).
However,
previous
work
been
limited
in
scalability
(input
vector
length
Applied Physics Reviews,
Journal Year:
2024,
Volume and Issue:
11(1)
Published: Jan. 31, 2024
Every
multi-input
multi-output
linear
optical
system
can
be
deemed
as
a
matrix
multiplier
that
carries
out
desired
transformation
on
the
input
information,
such
imaging,
modulation,
and
computing.
The
strong
programmability
of
has
been
explored
proved
to
able
bring
more
flexibility
greater
possibilities
applications
signal
processing
general
digital
analog
Furthermore,
burgeoning
integrated
photonics
with
advanced
manufacturing
light
manipulating
technology
pave
way
for
large-scale
reconfigurable
photonic
coherent
matrix.
This
paper
reviews
programmable
in
platform.
First,
theoretical
basis
optimizing
methods
three
types
(Mach–Zehnder
interferometer
mesh,
multi-plane
diffraction,
crossbar
array)
are
introduced.
Next,
we
overview
configuring
method
this
their
processing,
neural
network,
logic
operation,
recurrent
acceleration,
quantum
computing
comprehensively
reviewed.
Finally,
challenges
opportunities
discussed.
APL Photonics,
Journal Year:
2024,
Volume and Issue:
9(3)
Published: March 1, 2024
The
huge
development
of
micro-/nano-manufacturing
techniques
on
different
materials
has
greatly
expanded
the
possibilities
realizing
on-chip
multifunctional
devices
photonic
integrated
circuits.
In
recent
years,
we
have
witnessed
technological
advancements,
such
as
active
applications
through
hybrid
integration.
this
Perspective,
first
summarize
materials,
integration
technologies,
and
corresponding
coupling
in
give
technique
prospects.
We
also
introduce
significant
advances
technologies
for
applications,
laser
sources,
optical
frequency
combs,
modulators,
our
views
that
are
likely
to
develop
rapidly.
Finally,
discuss
challenges
applications.
ACS Photonics,
Journal Year:
2024,
Volume and Issue:
11(4), P. 1703 - 1714
Published: March 15, 2024
The
Ising
machine
(IM)
has
emerged
as
a
promising
tool
for
tackling
nondeterministic
polynomial-time
hard
combinatorial
optimization
problems
in
real-world
applications.
Among
various
types
of
IMs,
optoelectronic
IMs
based
on
electro-optical
(EO)
modulators
stand
out
an
impressive
platform
computations.
They
offer
simple
and
stable
architecture,
with
the
EO
modulator
providing
natural
inline
nonlinear
transfer
function
model.
However,
integrated
have
not
been
demonstrated
until
now,
exploring
large-scale
computations
within
constraints
digital
hardware
resources
remains
open
challenge
these
systems.
In
this
paper,
IM
thin-film
lithium
niobate
(TFLN)
photonic
chip
is
presented,
conjunction
sparse
matrix–vector
multiplication
algorithm
embedded
field-programmable
gate
array
that
optimizes
resource
utilization
minimizes
computational
latency.
This
setup
allows
us
to
solve
multiple
MAX-CUT
up
2048
spins
achieve
remarkably
low
iteration
latency
1.78
μs.
To
further
address
posed
by
devices
when
larger-scale
problems,
we
extend
application
TFLN
yet
another
new
scheme
which
single,
compact
on-chip
concurrently
performs
operations
linear
transformation.
demonstrates
capability
involving
16,384
spins,
which,
best
our
knowledge,
are
largest-scale
solved
IM,
highlighting
its
potential
overcome
limitations.
TFLN-based
provide
solution
high
scalability
potentially
practical
applications
addressing
complex
problems.
Optica,
Journal Year:
2024,
Volume and Issue:
11(4), P. 498 - 498
Published: Feb. 5, 2024
Time-bin
(TB)
and
energy-time
(ET)
entanglements
are
crucial
resources
for
long-distance
quantum
information
processing.
However,
their
standard
implementations
suffer
from
the
so-called
post-selection
loophole
that
allows
classical
simulation
thus
prevents
advantage.
The
has
been
addressed
in
proof-of-principle
experiments.
An
open
problem
though
is
to
close
it
real-life
applications
based
on
integrated
technologies.
This
especially
important
since,
so
far,
all
sources
of
TB
ET
loophole.
Here,
we
report
loophole-free
certification
or
entanglement
technologies,
by
implementing
a
silicon
nitride
chip
“hug”
scheme
[
Phys.
Rev.
Lett.
102
,
040401
(
2009
)
PRLTAO
0031-9007
10.1103/PhysRevLett.102.040401
]
certifying
genuine
through
violation
Bell
inequality.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Abstract
Optical
computing
leverages
high
bandwidth,
low
latency,
and
power
efficiency,
which
is
considered
as
one
of
the
most
effective
solutions
for
accelerating
deep
learning
tasks.
However,
mainstream
photonic
hardware
accelerators
are
primarily
optimized
two-dimensional
(2D)
matrix-vector
multiplications
(MVMs).
To
implement
three-dimensional
(3D)
convolutional
neural
networks
(CNNs),
high-order
tensors
must
be
reshaped,
duplicated,
cached
in
electrical
domain
according
to
size
before
computation,
leading
extra
memory
usage
time
overheads.
Additionally,
synchronization
across
multiple
channels
depends
on
external
electronic
clocks,
increases
complexity
system.
In
this
work,
we
propose
an
integrated
3D
tensor
processing
engine
(3D-TPE)
based
interweaving
time,
wavelength,
space.
Data
caching,
realized
optical
domain,
reducing
usage,
simplifying
caching
achieved
with
tunable
delay
line
chip
supporting
versatile
clock
frequencies
up
200
GHz,
accomplished
a
dual-coupled
micro-ring
resonators
(MRRs)
crossbar
3-dB
passband
width
50
GHz.
We
verify
capabilities
3D-TPE
at
ranging
from
10
GHz
30
perform
proof-of-concept
experiment
LiDAR
point
cloud
image
recognition
task
operating
20
achieving
accuracy
97.06%.
The
proposed
anticipated
facilitate
convolutions,
playing
important
role
autonomous
driving,
healthcare,
video
analytics,
virtual
reality,
etc.
Photonics,
Journal Year:
2025,
Volume and Issue:
12(1), P. 85 - 85
Published: Jan. 17, 2025
With
the
ever-growing
demand
for
high-speed
optical
communications,
microwave
photonics,
and
quantum
key
distribution
systems,
compact
electro-optic
(EO)
modulators
with
high
extinction
ratios,
large
bandwidth,
tuning
efficiency
are
urgently
pursued.
However,
most
integrated
lithium–niobate
(LN)
cannot
achieve
these
performances
simultaneously.
In
this
paper,
we
propose
an
improved
theoretical
model
of
a
chip-scale
microring
modulator
(EO-MRM)
based
on
X-cut
lithium–niobate-on-insulator
(LNOI)
hybrid
architecture
consisting
180-degree
Euler
bend
in
coupling
region,
double-layer
metal
electrode
structure,
ground–signal–signal–ground
(G-S-S-G)
configuration,
which
can
realize
highly
comprehensive
performance
footprint.
After
parameter
optimization,
designed
EO-MRM
exhibited
ratio
38
dB.
Compared
to
structure
without
bends,
increase
was
35
It
also
had
modulation
bandwidth
29
GHz
tunability
8.24
pm/V
when
straight
waveguide
length
100
μm.
At
same
time,
proposed
device
footprint
1.92
×
104
μm2.
The
MRM
provides
efficient
solution
communication
systems
is
helpful
fabrication
high-performance
multifunctional
photonic
devices.
Abstract
Topological
protection
provides
an
appealing
chance
to
suppress
the
backscattering
loss
and
wave
localization.
The
emerging
broadband
topological
slow‐light
waveguides
are
promising
for
many
on‐chip
applications.
However,
so
far
limited
single
mode,
multiple
modes
still
unexplored
which
can
promote
transmission
capacity
bring
in
novel
functionalities.
Here,
through
Brillouin
zone
winding
induced
by
side‐coupled
resonator
arrays,
one‐way
multimode
with
group
velocity
selectivity
resulting
from
mode
parity
matching
demonstrated.
One‐way
a
large
contrast
dual
slow
light
respectively
obtained.
conversion
between
two
distinct
due
perturbation
of
mirror
symmetry
is
also
observed.
Furthermore,
line
perturbed
waveguides,
near‐perfect
fidelity,
immunity
against
strong
asymmetric
disorders
simultaneously
achieved.
results
reveal
exciting
opportunities
toward
exquisite
manipulation
