We investigate photocarrier dynamics in a B i 2 S e 3 thin film via terahertz (THz) emission
spectroscopy. We report amplitude and phase modulations of the emitted THz wave under …

In this work, we propose a multi-band terahertz perfect absorber employing the topological
photonic crystal combined with VO_2 and graphene. The hybrid strong coupling among the …

We investigate the surface and interface states of Bi 2 Se 3 thin films by using the second-
harmonic generation technique. Distinct from the surface of bulk crystals, the film surface …

We investigate temperature-dependent carrier dynamics of InAs crystal by using reflection-
type terahertz time-domain spectroscopy, particularly with a recently developed emitter …

We investigate the surface states of topological insulator (TI) Bi 2 Se 3 thin films grown on Si
nanocrystals and Al 2 O 3 substrates by using terahertz (THz) emission spectroscopy …

A Dirac fermion emerges as a result of interplay between symmetry and topology in
condensed matter. Current research moves towards investigating the Dirac fermions in the …

We generate the THz wave on the surface of an unbiased GaAs crystal by illuminating
femtosecond laser pulses with a 45° incidence angle, and investigate its propagation …

We investigate a free-space propagation of a truncated terahertz beam created as a result of
a partial reflection from a small-sized metallic reflector. By using terahertz time-domain …

Three-dimensional (3D) topological insulators (TIs) hosting surface carriers with extremely
high mobility (𝜇) are intensively studied since their discovery due to their promising …