Metamaterial (MM) is artificial structure having
extraordinary electromagnetic features not found in nature.
Structure of MM is designed with meta-atoms, which interacts
with both the electric and magnetic fields of the electromagnetic
wave. Therefore, MM can create many interesting properties.
Nowday, some properties of MM were demonstrated in both
theorical and experimental experiments by many research groups
independently. However, novel properties of MM are discovered
and significantly affect to science and physics.
Many significant studies are focus mostly in negative
refractive index metamaterial (NRM), metamaterial absorber
(MA), or a combination of those in particular applications. MA
is able to absorb unity electromagnetic wave with geometric
scale much smaller than operating wavelength. In Vietnam,
research on metamaterials is mostly GHz region according to
limitations of fabrication and measurement.
In Terahertz (THz) region, an interaction between
electromagnetic wave with metamaterial in micrometer and
nanometer scale is much complicated because of quantum effects.
Beside, THz technology is appying in many fields: military,
information technology, media, biology, medicine, security,
environment, etc. Therefore, MM operating in THz region is
gaining much attention of researchers in worldwide, with many
significant applications in Laser in THz region, scanning system,
national defence. Otherwise, it is a fundamental field for
investigating metamaterial in visible region. With these reasons,
studying metamaterial in THz region is extremely significant.