We discuss the progress in the field of THz imaging based on time-domain spectroscopy
during the last 20 years emphasizing several highlights. These include 3D map** of the …

Over the past three decades a new spectroscopic technique with unique possibilities has
emerged. Based on coherent and time‐resolved detection of the electric field of ultrashort …

Large-scale synthesis of two-dimensional (2D) materials is one of the significant issues for
fabricating layered materials into practical devices. As one of the typical III–VI …

Atomic layers of two-dimensional (2D) materials have recently been the focus of extensive
research. This follows from the footsteps of graphene, which has shown great potential for …

We report the direct growth of large, atomically thin GaSe single crystals on insulating
substrates by vapor phase mass transport. A correlation is identified between the number of …

We present the controlled synthesis of high-quality two-dimensional (2D) GaSe crystals on
flexible transparent mica substrates via a facile van der Waals epitaxy method. Single-and …

Controlling the way light interacts with material excitations is at the heart of cavity quantum
electrodynamics (QED). In the strong-coupling regime, quantum emitters in a microresonator …

The generation of sub‐optical‐cycle, carrier–envelope phase‐stable light pulses is one of
the frontiers of ultrafast optics. The two key ingredients for sub‐cycle pulse generation are …

The measurement and control of light field oscillations enable the study of ultrafast
phenomena on sub-cycle time scales. Electro-optic sampling (EOS) is a powerful field …

Phase-locked terahertz transients with peak electric fields of 108 MV/cm and center
frequencies continuously tunable from 10 to 72 THz are generated via difference-frequency …