Optics Express,
Journal Year:
2024,
Volume and Issue:
33(2), P. 3543 - 3543
Published: Dec. 18, 2024
We
propose
and
demonstrate
integrated
photonic
crystal
(PhC)
beam
splitters
based
on
X-cut
thin
film
lithium
niobate
(TFLN).
Its
working
principle
is
bandgap
guidance
total
reflection
in
the
PhC
slab.
designed
two
structures:
one
features
a
triangular
lattice,
while
other
exhibits
tetragonal
lattice.
These
structures
have
compact
footprint,
with
size
of
14.857×4.982
15.275×5.295
µm
2
for
lattices,
respectively.
fabricate
these
devices
by
directly
etching
TFLN.
The
measured
insertion
losses
are
3.482
(triangular
lattice)
2.181
(tetragonal
dB.
Our
proposed
splitter
provides
novel
approach
realization
APL Photonics,
Journal Year:
2025,
Volume and Issue:
10(1)
Published: Jan. 1, 2025
We
design
and
fabricate
an
eight-channel
thin-film
lithium
niobate
(TFLN)
arrayed-waveguide
grating
(AWG)
demonstrate
the
electro-optical
tunability
of
device.
The
monolithically
integrated
microelectrodes
are
designed
for
waveguide
phase
modulation
wavelength
tuning.
Experiments
show
that
fabricated
electro-optically
controlled
TFLN
AWG
has
a
channel
spacing
200
GHz
tuning
efficiency
10
pm/V.
Applied Physics Letters,
Journal Year:
2025,
Volume and Issue:
126(1)
Published: Jan. 3, 2025
As
a
promising
candidate
material
for
holographic
displays,
lithium
niobate
(LN)
is
limited
by
its
slow
photorefractive
(PR)
response.
Recently,
it
was
discovered
that
Bi3+,
with
lone-pair
electrons,
can
effectively
enhance
the
PR
speed
of
LN
crystals.
However,
this
enhancement
only
effective
in
short-wavelength
range
visible
light,
and
response
time
remains
inadequate
full-color
dynamic
displays.
In
paper,
theoretical
framework
established
to
guide
shallow
energy-level
doping
We
simulate
energy
band
structure,
electron
mobility,
other
properties
crystals
doped
Tl,
Pb,
Sb
ions,
which
feature
using
first-principles
calculations.
The
results
indicate
when
occupies
Nb
site
(SbNb0),
defect
level
position
bandgap
shallow,
mobility
79.029
cm2
V–1
s–1
subsequently,
we
grew
series
LN:Sb
LN:Sb,Mg
characterized
their
crystalline
quality
properties.
High-resolution
x-ray
rocking
curve
demonstrate
all
as-grown
exhibit
excellent
quality,
FWHM
values
ranging
from
approximately
0.007°
0.008°.
Notably,
LN:Sb1.0,Mg6.0
crystal
demonstrates
rapid
1.67
s
at
671
nm,
nearly
three
times
faster
than
LN:Bi1.0,Mg6.0
crystal.
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.
Optics Letters,
Journal Year:
2025,
Volume and Issue:
50(7), P. 2370 - 2370
Published: Feb. 24, 2025
We
demonstrated
an
integrated
high-Q
cascaded
Fabry-Perot
(FP)
resonator
on
lithium
niobate
insulator
(LNOI)
implemented
by
multi-Sagnac
loop
reflectors,
which
was
fabricated
femtosecond
laser
photolithography-assisted
chemo-mechanical
polishing
(CMP).
Compared
with
the
that
comprised
only
two
Sagnac
reflectors
(SLRs),
there
is
a
significant
Q
factor
enhancement
in
formed
multi-SLRs.
The
loaded
of
measured
to
be
1.16
×
106,
five-fold
improvement
compared
state
art
same
material
platform.
Physical Review Letters,
Journal Year:
2025,
Volume and Issue:
134(16)
Published: April 23, 2025
Integrated
photonics
provides
an
important
platform
for
simulating
physical
models
with
high-performance
chip-scale
devices,
where
the
lattice
size
and
time
dependence
of
a
model
are
key
ingredients
further
enriching
functionality
photonic
chip.
Here,
we
propose
demonstrate
construction
various
time-varying
Hamiltonian
using
single
microresonator
on
thin-film
lithium
niobate
Such
integrated
holds
high-quality
factor
to
10^{6},
supports
synthetic
frequency
effective
sites
up
221
under
efficient
electro-optic
modulation.
By
applying
different
bichromatic
modulations
composed
two
radio-frequency
signals
oppositely
detuned
from
resonant
in
microresonator,
successfully
build
models,
temporal
features
dynamic
band
structures
captured
experimental
measurements,
highlighting
great
flexibility
tunability
this
Our
work
presents
chip
versatile
Hamiltonians,
which
pushes
forward
quantum
simulations
future
applications.
