Many asymmetric absorbers are currently based on a single-port system, where sound enters one side and is absorbed before a rigid wall. In this design, however, light and air are unable to pass ...

In addition to our other problems, we must also contend with transmission (with attenuation), reflection, refraction, diffraction, absorption, and scattering. In addition to our other problems, we ...

The chameleon changes its color by adjusting the spacing between photonic crystals in its skin to modulate light reflection (Figure 1). A research team at the University of California at Berkeley has ...

In this interview, Sue Berets, the Applications Scientist at Harrick Scientific, talks to AZoM about specular reflectance measurements and the difference between absolute and relative. Please tell us ...

The applications of ultrathin, conductive films such as those made of graphene have many applications, but it's been thought their efficacy is limited to absorbing only half of the incidental light at ...

Infrared spectroscopy (IRS) is a technique used to analyze individual substances in isolation or a mixture, using their spectral information. IRS is based on the measurement of the wavelength and ...

Can we turn back time? Ask a savvy physicist, and the answer will be “it depends.” Schemes for retrograde time travel abound but usually involve irreconcilable paradoxes and rely on outlandish ...

A Dutch-British research group is developing a 1μm crystalline silicon membrane with a remarkable optical performance and a hyper-uniform pattern design. A simulation of the device was theoretically ...