OPTICAL-TERAHERTZ CONVERTER Russian patent published in 2014 - IPC G02F2/00 

FIELD: physics.

SUBSTANCE: converter has a working semiconductor layer which is sensitive to femtosecond laser pulses while providing near-surface flashes of photoelectric current, which result in broadband terahertz radiation on a scheme for transmission of laser pulses with absorption by said working semiconductor layer, and a hyper-hemispherical terahertz lens placed at the output of the generated terahertz radiation, as well as means of screening propagation of the generated terahertz radiation in directions opposite the laser beam. The screening means is a screen made of material which is transparent to the laser beam and reflects the generated terahertz radiation, and is placed on the side of action of the laser beam while allowing the latter to pass through said screen.

EFFECT: high output of operational terahertz radiation, providing functional compatibility of the converter with both an electrical and a magnetic method for further amplification of the generated operational terahertz radiation, and high reliability of the converter.

3 cl, 3 dwg