Remote chemical detection in the atmosphere or some specific space has always been of
great interest in many applications for environmental protection and safety. Laser absorption …

Since the first demonstration in 1994, progress in the development of quantum cascade
lasers (QCLs) has been breathtakingly rapid. Various techniques based upon novel QCLs …

We show that large modulation of the amplitude and phase of mid-infrared light can be
achieved by dynamically shifting the resonance of graphene-metal plasmonic antennas via …

Exemplary embodiment can utilize the properties of tunable thin-film, material (eg,
graphene) to efficiently modulate the intensity, phase, and/or polarization of transmitted …

Mid-infrared absorption spectroscopy is highly relevant for a wide range of sensing
applications. In this letter, we demonstrate a Fourier-transform spectrometer chip based on …

The simultaneous detection of fractional exhaled nitric oxide (FeNO) and end-tidal carbon
dioxide (ETCO 2) is of great importance for the distinguishing and diagnosis of asthma and …

Rapid and sensitive standoff measurement techniques are needed for detection of trace
chemicals in outdoor plume releases, for example from industrial emissions, unintended …

We demonstrate a quantum cascade detector with two coupled double-well structures
exhibiting a high peak responsivity of 166 mA W− 1 for 8.2 μm detection at 80 K. The …

This work presents the proof of concept of a remote sensing system designed for the
detection of molecular species such as gas pollutants via active differential optical …

We report experimental realization of phase-locked quantum cascade laser (QCL) array
using a monolithically integrated Talbot cavity. An array with six laser elements at a …