High-frequency light is useful. The higher the frequency of light, the shorter its wavelength—and the shorter the wavelength, the smaller the objects and details the light can be used to see. Extreme ...

Modern photonic chips can pack sophisticated optical functions onto devices smaller than a fingernail. They are increasingly used to generate, manipulate and measure light for applications ranging ...

Imagine how a phone call works: Your voice is converted into electronic signals, shifted up to higher frequencies, transmitted over long distances, and then shifted back down so it can be heard ...

A photon enters a tiny disk of layered crystal no wider than a human hair. It circles the rim, bouncing along atomically smooth walls, and keeps going. One lap. A thousand. A hundred thousand. By the ...

Researchers report their insights on the emerging field of complex frequencies excitations, a recently introduced scheme to control light, sound and other wave phenomena beyond conventional limits.

The line of the first three OPA's that amplify the 3-micron beam. The green light is the parasitic second harmonic light of the 1-micron pump, and the red light is the sum frequency of the 1-micron ...

Researchers developed a new type of integrated photonic device capable of generating broad ranges of light frequencies on a chip. The device uses a silicon nitride core to generate optical frequency ...