Synergistic antireflection and SERS enhancement in hybrid silicon nanowires by LIL and MACE
Deleted Journal,
Год журнала:
2025,
Номер
20(1)
Опубликована: Фев. 21, 2025
Abstract
This
paper
presents
an
innovative
approach
to
fabricating
dual-functional
hybrid
silicon
nanowire
(SiNW)
arrays
that
demonstrate
antireflection
and
Surface-Enhanced
Raman
Scattering
(SERS)
potentials.
Three-beam
laser
interference
lithography
(TBLIL)
is
used
create
fringe
patterns
on
a
Si
substrate,
which
serves
as
template
for
subsequent
NWs
creation.
Subsequently,
metal-assisted
chemical
etching
(MACE)
selectively
etched
the
substrate
stimulated
formation
of
SiNWs
with
various
aspect
ratios.
The
morphological
optical
features
were
characterized
by
scanning
electron
microscopy
(SEM),
finite
difference
time
domain
(FDTD),
spectroscopy.
resulting
structured
surface
morphology
effectively
reduced
reflection
losses
at
wavelengths.
spectra
rhodamine
6G
(R6G)
analytes
concentrations
10
–4
–8
are
examined,
indicating
signals
significantly
enhanced
had
long-term
stability
reliability.
characteristic
peaks
R6G
observed
620,
1361,
1660
cm
−1
,
potentially
useful
in
sensitive
sensors.
Язык: Английский
Design and fabrication of curved waveguide display based on freeform polarization volume holograms
Optics Express,
Год журнала:
2025,
Номер
33(7), С. 15362 - 15362
Опубликована: Март 10, 2025
As
one
of
the
most
promising
augmented
reality
solutions,
waveguide
display
has
attracted
widespread
attention
in
recent
years.
However,
existing
research
and
commercial
products
are
limited
to
planar
scheme.
Here,
we
propose
a
curved
scheme
using
freeform
polarization
volume
holograms
(F-PVHs)
as
couplers.
The
design
this
relies
on
cooperative
optimization
after
coupler
is
unfolded.
Due
high
degrees
freedom
F-PVHs,
proposed
can
accurately
correct
aberrations
with
wide
field
view
while
improving
brightness
uniformity
imaging.
designed
be
conveniently
obtained
fabrication
process
flexible
transferable
F-PVHs.
systems
1D
2D
exit
pupil
expansion
presented
respectively.
effectiveness
superiority
our
method
demonstrated
through
high-resolution
imaging
results
large
eye
box
simulation.
Furthermore,
sample
prototype
prepared
prove
feasibility
Finally,
discuss
current
shortcomings
scalability
scheme,
hoping
pave
way
for
development
high-performance
displays.
Язык: Английский
Tuning the Electrical Resistivity of Molecular Liquid Crystals for Electro-Optical Devices
Michael Gammon,
Iyanna Trevino,
Michael Burnes
и другие.
Опубликована: Апрель 2, 2025
Язык: Английский
Three-layer polarisation volume grating with enhanced diffraction efficiency and FOV in AR and VR applications
Liquid Crystals,
Год журнала:
2024,
Номер
unknown, С. 1 - 10
Опубликована: Ноя. 4, 2024
In
the
rapidly
evolving
fields
of
Augmented
Reality
(AR)
and
Virtual
(VR),
achieving
high
diffraction
efficiency
a
wide
field
view
(FOV)
is
critical
for
enhancing
visual
experience.
This
paper
presents
three-layer
Polarisation
Volume
Grating
(TL-PVG)
structure
designed
to
address
limitations
single-layer
PVGs
in
AR/VR
applications.
By
stacking
multiple
PVG
layers
with
different
tilt
angles,
TL-PVG
achieves
an
expanded
angular
bandwidth
improved
efficiency,
enabling
brighter
more
immersive
displays.
The
proposed
incorporates
polarisation
multiplexing
optimise
optical
by
approximately
75%,
thereby
image
brightness
sharpness.
experimental
results
demonstrate
that
significantly
outperforms
traditional
PVGs,
offering
promising
solution
waveguide
elements
next-generation
study
provides
comprehensive
analysis
fabrication
process,
properties,
applications
TL-PVGs,
highlighting
their
potential
revolutionise
technology.
Язык: Английский