npj Quantum Information,
Journal Year:
2023,
Volume and Issue:
9(1)
Published: Feb. 22, 2023
Abstract
Quantum
states
of
light
and
matter
can
be
manipulated
on
the
nanoscale
to
provide
a
technological
resource
for
aiding
implementation
scalable
photonic
quantum
technologies.
Experimental
progress
relies
quality
efficiency
coupling
between
photons
internal
spin
emitters.
Here
we
demonstrate
nanophotonic
waveguide
platform
with
embedded
dots
(QDs)
that
enables
both
Purcell-enhanced
emission
strong
chiral
coupling.
The
design
uses
slow-light
effects
in
glide-plane
crystal
QD
tuning
match
frequency
region.
Simulations
were
used
map
chirality
Purcell
enhancement
depending
position
dipole
emitter
relative
air
holes.
highest
factors
occur
separate
regions,
but
there
is
still
significant
area
where
high
values
obtained.
Based
this,
first
record
large
radiative
decay
rate
17
±
2
ns
−1
(60
6
ps
lifetime)
corresponding
20
fold
enhancement.
This
was
achieved
by
electric-field
region
quasi-resonant
phonon-side
band
excitation.
We
then
5
1
dot
degree
modes,
substantially
surpassing
all
previous
measurements.
Together
these
excellent
prospects
using
QDs
implementations
on-chip
spin-photonics
relying
optics.
PRX Quantum,
Journal Year:
2024,
Volume and Issue:
5(1)
Published: March 13, 2024
The
scaling
barriers
currently
faced
by
both
quantum
networking
and
computing
technologies
ultimately
amount
to
the
same
core
challenge
of
distributing
high-quality
entanglement
at
scale.
In
this
Perspective,
a
novel
information-processing
architecture
based
on
optically
active
spins
in
silicon
is
proposed
that
offers
combined
single
technological
platform
for
scalable
fault-tolerant
networking.
optimized
overall
distribution
leverages
color-center
(T
centers)
their
manufacturability,
photonic
interface,
high-fidelity
properties.
Silicon
nanophotonic
optical
circuits
allow
links
between
T
centers,
which
are
networked
via
telecom-band
photons
highly
connected
graph.
This
high
connectivity
unlocks
use
low-overhead
error-correcting
codes,
significantly
accelerating
time
line
modular
repeaters
processors.
Published
American
Physical
Society
2024
Advanced Quantum Technologies,
Journal Year:
2022,
Volume and Issue:
5(5)
Published: March 25, 2022
Abstract
On‐demand
single‐photon
sources
emitting
pure
and
indistinguishable
photons
at
the
telecommunication
wavelength
are
critical
assets
toward
deployment
of
fiber‐based
quantum
networks.
Indeed,
single
may
serve
as
flying
qubits,
allowing
communication
information
over
long
distances.
Self‐assembled
InAs
dots
embedded
in
GaAs
constitute
an
excellent
nearly
deterministic
source
high‐quality
photons,
but
vast
majority
operate
900–950
nm
range,
precluding
their
adoption
a
network.
A
frequency
conversion
scheme
is
presented
here
for
converting
from
to
C
band,
around
1550
nm,
achieving
40.8%
end‐to‐end
efficiency,
while
maintaining
both
high
purity
degree
indistinguishability
during
with
measured
values
,
respectively.
Advanced Quantum Technologies,
Journal Year:
2022,
Volume and Issue:
5(10)
Published: Aug. 7, 2022
Incorporating
solid-state
quantum
emitters
into
optical
fiber
networks
enables
the
long-distance
transmission
of
information
and
remote
connection
distributed
nodes.
However,
interfacing
with
optics
encounters
several
challenges,
including
low
coupling
efficiency
stability.
Here,
we
demonstrate
a
highly
efficient
fiber-interfacing
photonic
device
that
directly
launches
single
photons
from
dots
standard
FC/PC-connectorized
single-mode
(SMF28).
Optimally
designed
structures
based
on
hole
gratings
produce
an
ultra-narrow
directional
beam
matches
small
numerical
aperture
fiber.
A
pick-and-place
technique
selectively
integrates
miniaturized
core
Our
approach
realizes
plug-and-play
single-photon
does
not
require
any
alignment
thus
guarantees
long-term
The
results
represent
major
step
toward
practical
reliable
lights
across
network.
ACS Photonics,
Journal Year:
2022,
Volume and Issue:
9(10), P. 3357 - 3365
Published: Sept. 13, 2022
The
recent
discovery
of
room
temperature
intrinsic
single-photon
emitters
in
silicon
nitride
(SiN)
provides
the
unique
opportunity
for
seamless
monolithic
integration
quantum
light
sources
with
well-established
SiN
photonic
platform.
In
this
work,
we
develop
a
novel
approach
to
realize
planar
waveguides
made
low-autofluorescing
and
demonstrate
emission
coupling
into
waveguide
mode.
observed
from
these
is
found
be
line
numerical
simulations.
mode
confirmed
by
second-order
autocorrelation
measurements
outcoupled
off
chip
grating
couplers.
Fitting
histogram
yields
$g^{(2)}(0)=0.35\pm0.12$
without
spectral
filtering
or
background
correction
an
photon
rate
$10^4$
counts
per
second.
This
demonstrates
first
successful
photons
monolithically
integrated
same
material.
results
our
work
pave
way
toward
realization
scalable,
technology-ready
circuitry
efficiently
interfaced
solid-state
emitters.
npj Quantum Information,
Journal Year:
2023,
Volume and Issue:
9(1)
Published: Feb. 22, 2023
Abstract
Quantum
states
of
light
and
matter
can
be
manipulated
on
the
nanoscale
to
provide
a
technological
resource
for
aiding
implementation
scalable
photonic
quantum
technologies.
Experimental
progress
relies
quality
efficiency
coupling
between
photons
internal
spin
emitters.
Here
we
demonstrate
nanophotonic
waveguide
platform
with
embedded
dots
(QDs)
that
enables
both
Purcell-enhanced
emission
strong
chiral
coupling.
The
design
uses
slow-light
effects
in
glide-plane
crystal
QD
tuning
match
frequency
region.
Simulations
were
used
map
chirality
Purcell
enhancement
depending
position
dipole
emitter
relative
air
holes.
highest
factors
occur
separate
regions,
but
there
is
still
significant
area
where
high
values
obtained.
Based
this,
first
record
large
radiative
decay
rate
17
±
2
ns
−1
(60
6
ps
lifetime)
corresponding
20
fold
enhancement.
This
was
achieved
by
electric-field
region
quasi-resonant
phonon-side
band
excitation.
We
then
5
1
dot
degree
modes,
substantially
surpassing
all
previous
measurements.
Together
these
excellent
prospects
using
QDs
implementations
on-chip
spin-photonics
relying
optics.
