Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: April 11, 2024
Abstract
Chip-scale
integration
is
a
key
enabler
for
the
deployment
of
photonic
technologies.
Coherent
laser
ranging
or
FMCW
LiDAR,
perception
technology
that
benefits
from
instantaneous
velocity
and
distance
detection,
eye-safe
operation,
long-range,
immunity
to
interference.
However,
wafer-scale
these
systems
has
been
challenged
by
stringent
requirements
on
coherence,
frequency
agility,
necessity
optical
amplifiers.
Here,
we
demonstrate
photonic-electronic
LiDAR
source
composed
micro-electronic-based
high-voltage
arbitrary
waveform
generator,
hybrid
circuit-based
tunable
Vernier
with
piezoelectric
actuators,
an
erbium-doped
waveguide
amplifier.
Importantly,
all
are
realized
in
manufacturing-compatible
process
comprising
III-V
semiconductors,
silicon
nitride
integrated
circuits,
130-nm
SiGe
bipolar
complementary
metal-oxide-semiconductor
(CMOS)
technology.
We
conducted
experiments
at
10-meter
precision
level
10
cm
50
kHz
acquisition
rate.
The
turnkey
linearization-free,
it
can
be
seamlessly
existing
focal
plane
phased
array
approaches.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 25, 2024
Abstract
Silicon
photonics
has
developed
into
a
mainstream
technology
driven
by
advances
in
optical
communications.
The
current
generation
led
to
proliferation
of
integrated
photonic
devices
from
thousands
millions-mainly
the
form
communication
transceivers
for
data
centers.
Products
many
exciting
applications,
such
as
sensing
and
computing,
are
around
corner.
What
will
it
take
increase
silicon
millions
billions
units
shipped?
next
look
like?
common
threads
integration
fabrication
bottlenecks
that
applications
face,
which
emerging
technologies
can
solve
them?
This
perspective
article
is
an
attempt
answer
questions.
We
chart
generational
trends
technology,
drawing
parallels
definitions
CMOS
technology.
identify
crucial
challenges
must
be
solved
make
giant
strides
CMOS-foundry-compatible
devices,
circuits,
integration,
packaging.
critical
systems
applications—in
communication,
signal
processing,
sensing.
By
identifying
summarizing
opportunities,
we
aim
stimulate
further
research
on
ecosystem.
Abstract
Light
detection
and
ranging
(LiDAR)
sensors
enable
precision
sensing
of
an
object
in
3D.
LiDAR
technology
is
widely
used
metrology,
environment
monitoring,
archaeology,
robotics.
It
also
shows
high
potential
to
be
applied
autonomous
driving.
In
traditional
sensors,
mechanical
rotator
for
optical
beam
scanning,
which
brings
about
limitations
on
their
reliability,
size,
cost.
These
can
overcome
by
a
more
compact
solid‐state
solution.
Solid‐state
are
commonly
categorized
into
the
following
three
types:
flash‐based
LiDAR,
microelectromechanical
system
(MEMS)‐based
phased
array
(OPA)‐based
LiDAR.
Furthermore,
advanced
optics
enables
novel
nanophotonics‐based
devices
with
superior
advantages
utilized
sensor.
this
review,
sensor
principles
introduced,
including
schemes:
pulsed
time
flight
(TOF),
amplitude‐modulated
continuous
wave
TOF,
frequency‐modulated
wave.
Recent
advances
conventional
summarized
presented,
MEMS‐based
OPA‐based
The
recent
progress
emerging
covered.
A
summary
made
future
outlook
provided.
Nature Photonics,
Journal Year:
2023,
Volume and Issue:
17(7), P. 573 - 581
Published: April 6, 2023
Abstract
Graphs
have
provided
an
expressive
mathematical
tool
to
model
quantum-mechanical
devices
and
systems.
In
particular,
it
has
been
recently
discovered
that
graph
theory
can
be
used
describe
design
quantum
components,
devices,
setups
systems,
based
on
the
two-dimensional
lattice
of
parametric
nonlinear
optical
crystals
linear
circuits,
different
standard
photonic
framework.
Realizing
such
graph-theoretical
hardware,
however,
remains
extremely
challenging
experimentally
using
conventional
technologies.
Here
we
demonstrate
a
programmable
device
in
very-large-scale
integrated
nanophotonic
circuits.
The
monolithically
integrates
about
2,500
constructing
synthetic
photon-pair
waveguide
sources
is
fabricated
eight-inch
silicon-on-insulator
wafer
by
complementary
metal–oxide–semiconductor
processes.
We
reconfigure
realize
process
complex-weighted
graphs
with
topologies
implement
tasks
associated
perfect
matching
property
graphs.
As
two
non-trivial
examples,
show
generation
genuine
multipartite
multidimensional
entanglement
structures,
measurement
probability
distributions
proportional
modulus-squared
hafnian
(permanent)
graph’s
adjacency
matrices.
This
work
realizes
prototype
manufactured
integration
technologies,
featuring
arbitrary
programmability,
high
architectural
modularity
massive
manufacturing
scalability.
Nature,
Journal Year:
2023,
Volume and Issue:
618(7964), P. 281 - 286
Published: May 10, 2023
Light-field
detection
measures
both
the
intensity
of
light
rays
and
their
precise
direction
in
free
space.
However,
current
light-field
techniques
either
require
complex
microlens
arrays
or
are
limited
to
ultraviolet-visible
wavelength
ranges1-4.
Here
we
present
a
robust,
scalable
method
based
on
lithographically
patterned
perovskite
nanocrystal
that
can
be
used
determine
radiation
vectors
from
X-rays
visible
(0.002-550
nm).
With
these
multicolour
arrays,
specific
directions
converted
into
pixelated
colour
outputs
with
an
angular
resolution
0.0018°.
We
find
three-dimensional
spatial
positioning
sources
possible
by
modifying
orientations.
also
demonstrate
object
imaging
X-ray
phase-contrast
combining
charge-coupled
device.
The
ability
detect
beyond
optical
wavelengths
through
colour-contrast
encoding
could
enable
new
applications,
for
example,
imaging,
robotics,
virtual
reality,
tomographic
biological
satellite
autonomous
navigation.
Microsystems & Nanoengineering,
Journal Year:
2023,
Volume and Issue:
9(1)
Published: March 20, 2023
Abstract
Silicon
photonics
has
emerged
as
a
mature
technology
that
is
expected
to
play
key
role
in
critical
emerging
applications,
including
very
high
data
rate
optical
communications,
distance
sensing
for
autonomous
vehicles,
photonic-accelerated
computing,
and
quantum
information
processing.
The
success
of
silicon
been
enabled
by
the
unique
combination
performance,
yield,
high-volume
capacity
can
only
be
achieved
standardizing
manufacturing
technology.
Today,
standardized
platforms
implemented
foundries
provide
access
optimized
library
components,
low-loss
routing,
fast
modulation,
continuous
tuning,
high-speed
germanium
photodiodes,
high-efficiency
electrical
interfaces.
However,
silicon’s
relatively
weak
electro-optic
effects
result
modulators
with
significant
footprint
thermo-optic
tuning
devices
require
power
consumption,
which
are
substantial
impediments
large-scale
integration
photonics.
Microelectromechanical
systems
(MEMS)
enhance
building
blocks
compact,
low-loss,
broadband,
low
consumption.
Here,
we
introduce
photonic
MEMS
platform
consisting
high-performance
nano-opto-electromechanical
fully
integrated
alongside
standard
foundry
wafer-level
sealing
long-term
reliability,
flip-chip
bonding
redistribution
interposers,
fibre-array
attachment
port
count
interfacing.
Our
experimental
demonstration
fundamental
circuit
elements,
couplers,
phase
shifters
wavelength-division
multiplexing
using
lifts
previous
enable
scaling
large
circuits
applications
telecommunications,
neuromorphic
sensing,
programmable
photonics,
computing.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(42)
Published: Oct. 20, 2023
Silicon
modulators
are
key
components
to
support
the
dense
integration
of
electro-optic
functional
elements
for
various
applications.
Despite
numerous
advances
in
promoting
modulation
speed,
a
bandwidth
ceiling
emerges
practices
and
becomes
an
obstacle
toward
Tbps-level
throughput
on
single
chip.
Here,
we
demonstrate
compact
pure
silicon
modulator
that
shatters
present
110
gigahertz.
The
proposed
is
built
cascade
corrugated
waveguide
architecture,
which
gives
rise
slow-light
effect.
By
comprehensively
balancing
series
merits,
can
benefit
from
slow
light
better
efficiency
size
while
remaining
sufficiently
high
bandwidth.
Consequently,
realize
110-gigahertz
with
124-micrometer
length,
enabling
112
gigabits
per
second
on-off
keying
operation.
Our
work
proves
gigahertz
feasible,
thus
shedding
its
potentials
ultrahigh
applications
such
as
optical
interconnection
photonic
machine
learning.
