Army

Terahertz (THz) radiation generator

New source radiation that will provide significantly more terahertz power when excited by a femtosecond laser pulse than that which can be obtained using state-of-the-art photoconductive switches

Photonics

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A femtosecond pulsed laser source (20) relative to a semiconductor crystal (10), and the terahertz beam produced by the femtosecond laser source.

Scientists at the Army Research Laboratory have recently invented a device for generating THz radiation which may have application in airport security scanners and other detection systems. The patented technology is available via patent license agreement to companies that would make, use, or sell it commercially.

THz-rays, which are shorter than microwaves and longer than infrared, have potential usage in biomedical and security applications in that THz-rays are safe, and non-ionizing, and can pass through (and enable viewing through) such materials as clothing, paper, cardboard, wood, masonry, plastic, ceramics, as well as penetrate fog and clouds. THz radiation is safe for biological tissues (unlike X-rays), and images can be formed with terahertz radiation having resolution of less than 1 mm. THz radiation has potential spectroscopic uses in that while many materials are transparent to THz, many materials exhibit unique spectral identifiers when exposed to terahertz radiation, including explosives, pharmaceuticals, and illegal narcotic substances.

ARL researchers have now developed a generator of broadband THz radiation from contactless semiconductor structures using optical excitation, such as a 100 femtosecond pulse source. The device enables the generation of broadband THz pulses with higher pulse energy than a conventional photoconductive switch approaches because it can support higher electric fields. Tests were performed using a coherent regenerative amplifier at 800 nm. The typical pulse width is approximately 150 fs with a pump power of approximately 3 mW.

Prenegotiated License Terms

Non-Exclusive
Partially Exclusive
Exclusive
License Execution Fee
$2,000
$3,000
$4,000
Royalty on Gross Sales
2%
3%
4%
Minimum Annual Royalty
$1,000
$1,000
$1,000
Sublicensing Pass Through
N/A
40%
40%

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