Uncooled terahertz photodetectors (PDs) showing fast (ps) response and high sensitivity
(noise equivalent power (NEP)< nW/Hz1/2) over a broad (0.5–10 THz) frequency range are …

Quantum cascade lasers (QCLs) have broken the spectral barriers of semiconductor lasers
and enabled a range of applications in the mid-infrared (MIR) and terahertz (THz) regimes …

Millimeter wave (mmWave) generation using photonic techniques has so far been limited to
the use of near-infrared lasers that are down-converted to the mmWave region. However …

We report a coherent terahertz (THz) imaging system that utilises a quantum cascade laser
(QCL) operating in pulsed-mode as both the source and detector. The realisation of a short …

Abstract Development and understanding of highly mechanically robust and electronically
conducting hydrogels are extremely important for ever‐increasing energy‐based …

Carboxamide derivatives containing p‐toluenesulfonamide functionality were synthesized
by the environmentally friendly method using zinc chloride catalyst. All the synthesized …

Catastrophic optical damage (COD) is one of the reasons limiting the output power and
lifetime of semiconductor lasers. Nevertheless, the automatic defects inspection of the COD …

The typical modal characteristics arising during laser feedback interferometry (LFI) in multi-
mode terahertz (THz) quantum cascade lasers (QCLs) are investigated in this work. To this …

The phenomenon of self-pulsation (SP) in terahertz (THz) quantum cascade lasers (QCLs)
due to optical feedback was reported recently. In this Letter, we propose a THz imaging …

We present an experimental study of the turn-on delay in pulsed mid-infrared quantum
cascade lasers. We report the unexpectedly long delay time depending on the pum** …