Demand for high levels of quality and safety in agricultural products and food requires
appropriate analytical techniques for analysis both during and after production. Desirable …

Metamaterials are artificial composites that acquire their electromagnetic properties from
embedded subwavelength metallic structures. In theory, the effective electromagnetic …

We present terahertz (THz) reflective spectroscopic focal-plane imaging of four explosive
and bio-chemical materials (2, 4-DNT, Theophylline, RDX and Glutamic Acid) at a standoff …

T-ray wavelengths are long enough to pass through dry, nonpolar objects opaque at visible
wavelengths, but short enough to be manipulated by optical components to form an image …

Terahertz wavelengths can pass through dry, non-polar, non-metallic materials that are
opaque at visible wavelengths. Moreover they can be manipulated using millimeter wave …

Laser crystals with multiwavelength emission characteristics are potential light sources for
terahertz radiation. Herein, the pure and Nd-doped Bi2Ti2O7 (BTO) laser crystals with sizes …

The safety of milk powder is closely related to everyone's life. In the production of milk
powder, it is often easy to mix in foreign bodies, such as light and thin plastic, insects …

This work provides a performance comparison of four different machine learning classifiers:
multinomial logistic regression with ridge estimators (MLR) classifier, k-nearest neighbours …

This paper reports the design, the microfabrication and the experimental characterization of
an ultra-thin narrow-band metamaterial absorber at terahertz frequencies. The metamaterial …

Publisher Summary Lasers offer multiple approaches for explosive detection that are not
possible with other techniques. In general, these can be separated into two types: those …