Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(19)
Published: March 14, 2024
Abstract
Multi‐foci
lenses
are
essential
components
for
optical
communications,
virtual
reality
display
and
microscopy,
yet
the
bulkiness
of
conventional
counterparts
has
significantly
hindered
their
widespread
applications.
Benefiting
from
unprecedented
capability
metasurfaces
in
light
modulation,
metalenses
able
to
provide
multi‐foci
functionality
with
a
more
compact
footprint.
However,
achieving
imaging
quality
comparable
that
corresponding
single‐foci
at
each
focal
point
poses
challenge
existing
metalenses.
Here,
polarization‐independent
all‐dielectric
metalens
is
proposed
experimentally
demonstrated
by
spatially
integrating
sparse‐aperture
sub‐metalenses.
Such
design
enables
generate
multiple
points,
while
maintaining
ability
capture
target
information
metalens.
The
composed
square‐nanohole
units
array
fabricated
two‐photon
polymerization.
focusing
characteristic
upon
illumination
an
unpolarized
beam.
This
work
finds
novel
route
toward
may
open
new
avenue
dealing
trade‐off
between
high‐quality
performance.
Applied Physics Letters,
Journal Year:
2024,
Volume and Issue:
124(26)
Published: June 24, 2024
Here
we
present
a
roadmap
on
Photonic
metasurfaces.
This
document
consists
of
number
perspective
articles
different
applications,
challenge
areas
or
technologies
underlying
photonic
Each
will
introduce
the
topic,
state
art
as
well
give
an
insight
into
future
direction
subfield.
Abstract
Metalenses
have
revolutionized
optical
technologies
with
their
superior
ability
to
manipulate
light
and
the
potential
replace
conventional,
bulky
components.
However,
commercialization
is
hindered
by
limitations
in
conventional
manufacturing
techniques,
such
as
small
patterning
areas,
low
throughput,
high
cost.
In
this
study,
two
methods
are
introduced
for
scalable
wafer‐scale
of
metalenses
operating
near‐infrared
region,
aimed
at
overcoming
abovementioned
challenges.
The
first
type
metalens
polarization‐independent
constructed
using
hydrogenated
amorphous
silicon
cylindrical
structures
fabricated
through
direct
photolithography.
This
has
a
diameter
1
cm
numerical
aperture
(NA)
0.53.
focusing
efficiency
confirmed
940
nm
wavelength,
focal
spot
profile
approaches
diffraction
limit.
second
polarization‐dependent
nanoparticle‐embedded‐resin
rectangular
cost‐effective
nanoimprinting
method.
process
can
produce
5
mm
an
NA
Both
types
demonstrate
high‐resolution
capabilities
when
imaging
1951
USAF
resolution
test
target
bioimaging.
research
offers
innovative
pathways
mass
production
large‐scale
fabrication
metalenses.
It
believed
that
work
will
accelerate
industrialization
metalenses,
fostering
further
advances
technology.
Abstract
Miniaturizing
spectrometers
for
compact
and
cost-effective
mobile
platforms
is
a
major
challenge
in
current
spectroscopy
research,
where
conventional
are
impractical
due
to
their
bulky
footprint.
Existing
miniaturized
designs
primarily
rely
on
precalibrated
response
functions
of
nanophotonic
structures
encode
spectral
information
captured
snapshot
by
detector
arrays.
Accurate
spectrum
reconstruction
achieved
through
computational
techniques,
but
this
requires
precise
component
design,
high-precision
fabrication,
calibration.
We
propose
an
ultra-simplified
spectrometer
that
employs
one-to-broadband
diffraction
decomposition
strategy
facilitated
numerical
regularized
transform
depends
only
the
diffracted
radiation.
The
key
feature
our
design
use
simple,
arbitrarily
shaped
pinhole
as
partial
disperser,
eliminating
need
complex
encoding
full
Our
achieves
reconstructed
peak
location
accuracy
better
than
1
nm
over
200
bandwidth
excellent
resolution
peaks
separated
3
bimodal
spectrum,
all
within
footprint
under
half
inch.
Notably,
approach
also
reveals
breakthrough
broadband
coherent
diffractive
imaging
without
requiring
any
prior
knowledge
illumination
assumptions
non-dispersive
specimens,
or
correction
quantum
efficiency.
Opto-Electronic Advances,
Journal Year:
2025,
Volume and Issue:
0(0), P. 240159 - 240159
Published: Jan. 1, 2025
Semiconductor
optoelectronics
devices,
capable
of
converting
electrical
power
into
light
or
conversely
in
a
compact
and
highly
efficient
manner
represent
one
the
most
advanced
technologies
ever
developed,
which
has
profoundly
reshaped
modern
life
with
wide
range
applications.
In
recent
decades,
semiconductor
technology
rapidly
evolved
from
first-generation
narrow
bandgap
materials
(Si,
Ge)
to
latest
fourth-generation
ultra-wide
(GaO,
diamond,
AlN)
enhanced
performance
meet
growing
demands.
Additionally,
merging
devices
other
techniques,
such
as
computer
assisted
design,
state-of-the-art
micro/nano
fabrications,
novel
epitaxial
growth,
have
significantly
accelerated
development
devices.
Among
them,
integrating
metasurfaces
optoelectronic
opened
new
frontiers
for
on-chip
control
their
electromagnetic
response,
providing
access
previously
inaccessible
degrees
freedom.
We
review
advances
variety
using
integrated
metasurfaces,
including
lasers,
emitting
photodetectors,
low
dimensional
semiconductors.
The
integration
semiconductors
offers
wafer-level
ultracompact
solutions
manipulating
functionalities
while
also
practical
platform
implementing
cutting-edge
metasurface
real-world
Abstract
In
the
domain
of
spectroscopy,
miniaturization
efforts
often
face
significant
challenges,
particularly
in
achieving
high
spectral
resolution
and
precise
construction.
Here,
we
introduce
a
computational
spectrometer
powered
by
nonlinear
photonic
memristor
with
WSe
2
homojunction.
This
approach
overcomes
traditional
limitations,
such
as
constrained
Fermi
level
tunability,
persistent
dark
current,
limited
photoresponse
dimensionality
through
dynamic
energy
band
modulation
driven
palladium
(Pd)
ion
migration.
The
critical
role
Pd
migration
is
thoroughly
supported
first-principles
calculations,
numerical
simulations,
experimental
verification,
demonstrating
its
effectiveness
enhancing
device
performance.
Additionally,
integrate
this
specialized
neural
network
tailored
to
address
memristor’s
inherent
photoresponse.
combination
enables
our
achieve
an
exceptional
peak
wavelength
accuracy
0.18
nm
within
630–640
range.
development
marks
advancement
creation
compact,
high-efficiency
spectroscopic
instruments
offers
versatile
platform
for
applications
across
diverse
material
systems.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(47)
Published: Nov. 22, 2023
Generation
and
manipulation
of
three-dimensional
(3D)
optical
polarization
structures
have
received
considerable
interest
because
their
distinctive
features
potential
applications.
However,
the
realization
multiple
3D
in
a
queue
along
light
propagation
direction
has
not
yet
been
reported.
We
propose
experimentally
demonstrate
metalens
to
create
longitudinally
variable
knots.
A
single
can
simultaneously
generate
three
distinct
knots,
which
are
indirectly
validated
with
rotating
polarizer.
The
profiles
dynamically
modulated
by
manipulating
linear
incident
light.
further
showcase
image
steganography
generated
structures.
ultrathin
nature
metasurfaces
unique
properties
developed
metalenses
hold
promise
for
lightweight
systems
applicable
areas
such
as
virtual
reality.
Photonics Research,
Journal Year:
2024,
Volume and Issue:
12(3), P. 514 - 514
Published: Jan. 3, 2024
Polarization
is
crucial
in
various
fields
such
as
imaging,
sensing,
and
substance
detection.
A
compact,
fast,
accurate
polarization
detection
device
vital
for
these
applications.
Herein,
we
demonstrate
a
multifocus
metalens
terahertz
that
requires
only
single
measurement
to
obtain
complete
parameters
reconstruct
the
state
of
incident
field.
The
individual
subarrays
this
convert
each
six
polarized
components
into
same
polarization,
which
turn
links
Stokes
foci.
linear
polarizations
elliptical
are
characterized
by
ellipses.
Simulations
experimental
results
show
scheme
can
accurately
detect
with
measurement.
proposed
metasurface
polarimetry
may
find
applications
real-time
integrated
optics.
