Various ultrathin planar optical elements, including cylindrical lens, spherical lens, and
phase holograms, are designed based on the interface phase modulation of antenna …

We study the operation of an 8.5 μm quantum cascade laser based on GaInAs/AlInAs lattice
matched to InP using three different simulation models based on density matrix (DM) and …

Electrons performing Bloch oscillations in an energy band of a dc-biased superlattice in the
presence of weak dissipation can potentially generate THz fields at room temperature. The …

We propose a new type of optical transistor for a broadband amplification of terahertz
radiation. It is made of a graphene-superconductor hybrid, where electrons and Cooper …

The impact of the interface roughness on intersubband transitions (ISTs) in quantum wells is
analyzed as an inhomogeneous broadening due to localization rather than a traditional …

We investigate the possibility of interconduction band gain without global inversion by
engineering the conduction band effective masses so that the upper lasing subband has an …

We report spectrally resolved gain measurements and simulations for quantum cascade
lasers (QCLs) composed of multiple heterogeneous stacks designed for broadband …

Absorption spectroscopy of gases and liquids is amongst the most widely used methods to
measure molecular concentrations. It is used in various fields, amongst them are industrial …

Summary The Quantum Cascade Laser (QCL) concept is extremely versatile and is now
considered to be ready for take‐off in a large variety of technological applications covering …

In this work, we study the interaction of ultrashort midinfrared pulses with the active medium
of an In Ga As∕ In Al As∕ In P quantum cascade laser emitting at an 11.7 μ m wavelength …