Journal of Optics,
Journal Year:
2024,
Volume and Issue:
26(12), P. 125403 - 125403
Published: Oct. 29, 2024
Abstract
Whispering
gallery
mode
(WGM)
resonators
with
high
optical
quality
factor
(
Q
)
are
sensitive
to
environment
changes
and
used
in
various
sensing
applications.
We
have
developed
a
high-precision
temperature
sensor
using
compactly
packaged
lithium
niobate
WGM
resonator.
This
offers
sensitivity
of
34.38
pm
°C
−1
resolution
up
5.6×10−4
°C.
It
is
portable
,
making
it
suitable
for
outside
the
laboratory.
The
device
also
resilient
humidity,
enhancing
its
practicality.
Biosensors,
Journal Year:
2025,
Volume and Issue:
15(1), P. 35 - 35
Published: Jan. 9, 2025
Surface
Plasmon
Resonance
(SPR)-based
biodetection
systems
have
emerged
as
powerful
tools
for
real-time,
label-free
biomolecular
interaction
analysis,
revolutionizing
fields
such
diagnostics,
drug
discovery,
and
environmental
monitoring.
This
review
highlights
the
foundational
principles
of
SPR,
focusing
on
interplay
evanescent
waves
surface
plasmons
that
underpin
its
high
sensitivity
specificity.
Recent
advancements
in
SPR
technology,
including
enhancements
sensor
chip
materials,
integration
with
nanostructures,
coupling
complementary
detection
techniques,
are
discussed
to
showcase
their
role
improving
analytical
performance.
The
paper
also
explores
diverse
applications
systems,
ranging
from
pathogen
cancer
biomarker
identification
food
safety
monitoring
toxin
analysis.
By
providing
a
comprehensive
overview
technological
progress
emerging
trends,
this
underscores
transformative
potential
SPR-based
addressing
critical
scientific
societal
challenges.
Future
directions
challenges,
miniaturization,
cost
reduction,
expanding
multiplexing
capabilities,
presented
guide
ongoing
research
development
rapidly
evolving
field.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(5), P. 1455 - 1455
Published: Feb. 27, 2025
Topological
photonic
sensors
have
emerged
as
a
breakthrough
in
modern
optical
sensing
by
integrating
topological
protection
and
light
confinement
mechanisms
such
states,
quasi-bound
states
the
continuum
(quasi-BICs),
Tamm
plasmon
polaritons
(TPPs).
These
devices
exhibit
exceptional
sensitivity
high-Q
resonances,
making
them
ideal
for
high-precision
environmental
monitoring,
biomedical
diagnostics,
industrial
applications.
This
review
explores
foundational
physics
diverse
sensor
architectures,
from
refractive
index
biosensors
to
gas
thermal
sensors,
emphasizing
their
working
principles
performance
metrics.
We
further
examine
challenges
of
achieving
ultrahigh-Q
operation
practical
devices,
limitations
multiparameter
sensing,
design
complexity.
propose
physics-driven
solutions
overcome
these
barriers,
Weyl
semimetals,
graphene-based
heterostructures,
non-Hermitian
systems.
comparative
study
highlights
transformative
impact
ultra-sensitive
detection
across
multiple
fields.
Heliyon,
Journal Year:
2025,
Volume and Issue:
11(2), P. e41864 - e41864
Published: Jan. 1, 2025
In
the
domain
of
criminal
investigations,
integration
nanotechnology
has
emerged
as
a
transformative
force,
mirroring
advancements
across
diverse
scientific
realms.
This
study
focuses
on
leveraging
synergistic
potential
bimetallic
TiO2/Bi2O3
nano-composite
to
meticulously
evaluate
vitreous
potassium
levels
in
human
cadavers.
The
designed
exhibits
finely
structured
morphology,
characterized
by
diminutive
sheet-like
formations
spanning
nano-scale
dimension
20-250
nm.
Through
rigorous
analysis,
we
establish
robust
linear
correlation
(R2
=
0.992)
between
nanocomposite
and
concentrations
postmortem
samples.
Notably,
demonstrates
an
exceptional
limit
detection
at
0.001
nM,
surpassing
comparable
materials
methodologies
reported
date
(FTIR,
GC-MS
biochemical
analysis)
provide
measurement
time
since
death
with
precision
1
h.
elevated
sensitivity
opens
new
possibilities
for
enhancing
accuracy
efficiency
forensic
analyses,
ultimately
aiding
pursuit
justice.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(14), P. 6365 - 6365
Published: July 22, 2024
Integrated
photonics
is
a
cutting-edge
field
that
merges
optics
and
electronics
on
single
microchip,
revolutionizing
how
we
manipulate
transmit
light.
Imagine
traditional
bulky
optical
systems
condensed
onto
chip
smaller
than
fingernail,
enabling
faster
communication,
more
efficient
sensors,
advanced
computing.
At
its
core,
integrated
relies
guiding
light
through
waveguides
etched
semiconductor
substrates,
analogous
to
wires
conduct
electricity
in
electric
circuits.
These
can
route,
modulate,
detect
signals
with
unprecedented
precision
speed.
This
technology
holds
immense
promise
across
various
domains.
Despite
potential,
faces
challenges,
including
manufacturing
complexities
integration
existing
electronic
systems.
However,
ongoing
research
advancements
continue
push
the
boundaries,
promising
future
where
light-based
technologies
seamlessly
integrate
into
our
everyday
lives,
powering
new
era
of
innovation
connectivity.
Micromachines,
Journal Year:
2024,
Volume and Issue:
15(12), P. 1434 - 1434
Published: Nov. 28, 2024
In
this
work,
we
propose
a
novel
suspended
slot
membrane
waveguide
(SSMW)
utilizing
germanium-on-silicon-on-insulator
(Ge-on-SOI)
platform
for
carbon
dioxide
(CO2)
gas-sensing
applications.
The
design
and
analysis
focus
on
the
absorption
line
of
CO2
in
mid-infrared
region,
specifically
at
wavelength
4.23
µm.
geometry
has
been
precisely
optimized
to
achieve
high
evanescent
field
ratio
(EFR)
minimize
propagation
losses.
These
optimizations
significantly
enhance
sensitivity
waveguide,
making
it
highly
effective
absorption-based
gas
sensing.
Our
demonstrates
notable
EFR
0.86,
with
low
loss
just
1.07
dB/cm,
achieves
as
~1.12
×
10−4
ppm−1
SSMW
lengths
short
0.9
cm.
