A scanning electron microscope (SEM) image of a terahertz quantum cascade laser (QCL) device. Credits: Qing Hu and colleagues A new type of high-power quantum cascade laser that works without bulky ...

A terahertz laser designed by MIT researchers is the first to reach three key performance goals at once -- high constant power, tight beam pattern, and broad electric frequency tuning -- and could ...

As part of their study, Houard and his colleagues set out to reliably control the direction of laser-produced THz radiation in air, using a newly introduced technique called flying focus.

A new terahertz laser is the first to reach three key performance goals at once -- high constant power, tight beam pattern, and broad electric frequency tuning -- and could thus be valuable for a ...

A compact, widely tunable terahertz laser could enable development of futuristic communications, security, biomedical and astronomical imaging systems ...

Researchers from MIT, Harvard University, and the U.S. Army have built a compact device, the size of a shoebox, that produces a terahertz laser whose frequency they can tune over a wide range. The ...

Terahertz (THz) pulses are generated by irradiating a metal wire with femtosecond laser pulses. For incident laser energy of 3 mJ, a THz pulse with energy of 28 μJ is obtained from a 10-cm-long ...

Terahertz (THz) radiation is one of the hottest areas of modern physics research. This is because THz light waves, or T-rays as they are sometimes called, have great potential for spectroscopy and ...

A room-temperature semiconductor terahertz laser is portable, and since it can be fabricated in bulk on a wafer, it would be more economical than other types of terahertz lasers.

Terahertz generation benefits from laser know-how 21 Jun 2007 Although many applications could potentially benefit from terahertz radiation, finding a convenient way to generate it has been ...

In the far infrared band of the electromagnetic spectrum, engineers are exploring the terahertz gap, which could lead to a wave of faster, more sensitive technologies.