Applied Optics,
Год журнала:
2024,
Номер
63(27), С. 7079 - 7079
Опубликована: Авг. 27, 2024
The
sensitivity
of
phase-change
materials
to
low-energy
photons
has
enabled
the
development
tunable
terahertz
(THz)
generators
for
vortex
beams.
In
this
study,
a
composite
unit
structure
based
on
Dirac
semimetal
(DSM),
vanadium
dioxide
(VO
2
),
and
polyimide
is
proposed,
with
360°
phase
coverage
achieved
by
rotating
angle
DSM
structure.
addition,
switching
VO
between
medium
metal
controlled
changing
its
temperature,
resulting
in
metasurface
orbital
angular
momentum
(OAM)
beam
switch
transmission
five-layer
reflection
three-layer
metasurface,
operating
structured
mode,
designed
as
generator
topological
charges
−1
+2,
realized
frequency
Fermi
energy
level
DSM.
broadband
+2.
switchable
OAM
modes
generated
are
DSM,
selective
incidence
left
circularly
polarized
right
waves
THz
band.
This
potential
applications
wireless
communication
systems
range.
