Ultra-short pulses are an attractive way of expanding today's terahertz time-domain systems
toward frequencies above 2 THz, and moreover mode control enables reliable generation of …

We present the use of the cavity antenna model in predicting the radiative loss, far-field
polarization and far-field beam patterns of terahertz quantum-cascade (QC) lasers. Metal …

The use of integrated photonic structures to tailor the behavior of light is extremely promising
for optimizing performance and for introducing advanced functionalities into optoelectronic …

We exploit the modal confinement properties of metal-metal ridge waveguides to investigate
the effect of reducing the thickness of the active laser cores in both terahertz and mid …

We demonstrate a framework to understand and predict the far-field emission in terahertz
frequency photonic-crystal quantum cascade lasers. The devices, which employ a high …

The design and fabrication of a high power THz quantum cascade laser (QCL), with
electrically controllable transverse mode is presented. The switching of the beam pattern …

Terahertz frequency photonic-crystal quantum cascade lasers allow directional and
controllable surface emission while at the same time functioning efficiently well above liquid …

The far-field emission profile of terahertz quantum cascade lasers (QCLs) in metal-metal
waveguides is controlled in directionality and form through planar horn-type shape …

Coherent detection of emission from quantum cascade lasers with metal-metal waveguides
is demonstrated through free-space coupling of a THz pulse to the sub-wavelength …

Continuous-wave laser action has been achieved in a 2.7 THz quantum cascade device
operating on the modes of a two-dimensional photonic crystal resonator. The photonic …