Plasmonics, Journal Year: 2025, Volume and Issue: unknown
Published: May 5, 2025
Language: Английский
IntechOpen eBooks, Journal Year: 2025, Volume and Issue: unknown
Published: March 10, 2025
Metamaterials (MMs) enable the manipulation of terahertz (THz) waves, which are vital for numerous applications due to their unique spectral fingerprints, non-ionizing nature, sensitivity weak resonances, and strong penetration through non-polar materials. However, detecting minor disturbances subtle features in biological chemical sensing is challenging when object’s scale smaller than THz wavelength. This limits development bio-chemical detection technology. MMs offer a solution, with recent research combining these materials new structures mechanisms enhance sensitivity. article reviews progress sensing, focusing on key performance parameters like spoof surface plasmon polaritons (SSPPs), bound states continuum (BIC), electromagnetically induced transparency (EIT). It explores future directions biomedical diagnostics, non-destructive testing, security, environmental highlighting transformative impact
Language: Английский
Citations
0
Optics Express, Journal Year: 2025, Volume and Issue: 33(7), P. 14777 - 14777
Published: March 17, 2025
Multi-band polarization converters are crucial for reducing coupling between multiple-input multiple-output antenna components, promoting the integration of communication systems, and improving information transmission efficiency. However, current research faces challenges such as narrow operational bandwidth, low conversion efficiency, lack correlation frequency bands multi-band operation. A dual-wideband linear-to-circular (LC) converter (PC) based on dual mechanism metal dielectric is proposed in this paper. The unit cell LC PC optimized through three steps from a conventional metal-dielectric-metal structure. optimization primarily involves creating cavities with special structures dielectric, which introduces resonance addition to original resonance. Simulation results demonstrate that can convert incident linearly polarized waves into orthogonal circularly two nonadjacent bands. upper lower cutoff frequencies second band exactly twice those first. first operating ranges 0.645 0.865 THz, relative bandwidth 29%, producing right-handed wave. 1.29-1.73 wave left-handed. device's capability achieve frequency-doubling relationship circular makes it promising applications advanced high-speed communications, signal encryption, quantum technology, differential detection chiral molecules.
Language: Английский
Citations
0
Optical and Quantum Electronics, Journal Year: 2025, Volume and Issue: 57(5)
Published: April 20, 2025
Language: Английский
Citations
0
Nanophotonics, Journal Year: 2025, Volume and Issue: unknown
Published: May 2, 2025
Abstract
The
emergence
of
metasurfaces
has
enabled
lightweight,
compact
imaging
with
degrees
freedom
which
previously
required
complex
optical
setups
to
achieve,
such
as
polarization,
wave
vector,
and
spectrum.
To
date,
most
metasurface-enabled
systems
have
thus
far
been
‘passive’,
therefore
subject
fundamental
information
thickness
limits
set
by
the
coupling
light
their
sensor
arrays.
We
discuss
use
active
in
low
form-factor
pixel-count
introduce
a
prototypical
lensless
system
concept
employs
an
metasurface
high-frequency,
continuously
tunable
amplitude
phase
modulation
aperture,
coupled
discrete
single-pixel
detector.
analyze
scalability
platform
computationally
demonstrate
that
scalable
‘perimeter-control’
addressing
architecture
–
M
×
N
rectangular
array
scattering
elements
is
addressed
only
+
voltages
sufficient
for
image
collection,
even
when
scatterers
exhibit
limited
Language: Английский
Citations
0
Plasmonics, Journal Year: 2025, Volume and Issue: unknown
Published: May 5, 2025
Language: Английский
Citations
0