In order to design optical metamaterials to surpass the limitation of unnaturally high
refractive index in visible range, we propose the nanocylinders nanostructure with …

Refraction in materials is a fundamental phenomenon in optics and is a factor in the
manipulation of light, such as wavefront shaping and beam control. However, conventional …

Thin terahertz (THz)-wave optical components are fundamentally important for integrated
THz-wave spectroscopy and imaging systems, especially for phase manipulation devices …

Metasurfaces substituted for naturally occurring materials make it possible to develop flat
optics manipulating terahertz waves. However, the control of unprecedented material …

Terahertz flat optics based on our originally developed low-reflection metasurface with a
high refractive index can offer attractive two-dimensional optical components for the …

Terahertz flat optics is a design concept for replacing conventional three-dimensional bulky
optical components with two-dimensional ultra-thin optical components. However, high …

A high refractive index metamaterial was theoretically designed in the terahertz region, and
the proposed structure is to easy implementation. By decreasing the diamagnetic effect with …

Flat optics based on metasurfaces produce unprecedented two-dimensional planar optical
elements that cannot be developed with naturally occurring materials. However, it remains to …

With advances in terahertz technology, achieving high and nearly constant birefringence
over a wide frequency range plays an extreme role in many advanced applications. In the …

Terahertz continuous-wave (CW) sources oscillating around the 1.0 THz band at room
temperature have rapidly been developed to bridge the terahertz gap. However …