Optical gas sensors play an increasingly important role in many applications. Sensing
techniques based on mid-infrared absorption spectroscopy offer excellent stability …

There is currently much activity toward the integration of mid-infrared semiconductor lasers
on Si substrates for developing a variety of smart, compact, sensors based on Si-photonics …

Silicon photonic integrated circuits for telecommunication and data centers have been well
studied in the past decade, and now most related efforts have been progressing toward …

Laser absorption spectroscopy (LAS) has been rapidly developed and widely applied to
combustion diagnosis in recent decades. As a cost-effective tool for measuring multiple …

In the last decade quantum cascade lasers (QCLs) have become the most widely used
source of mid-infrared radiation, finding large scale applications because of their wide …

The mid-infrared (mid-IR) is a wavelength range with a variety of technologically vital
applications in molecular sensing, security and defense, energy conservation, and …

Terahertz quantum cascade laser (QCL) sources based on intra-cavity difference frequency
generation are currently the only electrically pumped monolithic semiconductor light sources …

The discovery of Dirac fermions in a number of 2D and 3D materials boosted the solid-state
research in an unprecedented way. Among the many hopes of using their exceptional …

Terahertz pulse time-domain holography (THz PTDH) is the powerful technique for high-
resolution amplitude and phase THz imaging that allows mapping spectroscopic information …

A THz nonstationary high-resolution spectrometer based on semiconductor superlattice
multipliers is applied to investigate the dynamics of urine composition for cancer patients …