Abstract
By mixing two copropagating coherent beams near in a zinc blende GaP crystal, we have efficiently generated coherent terahertz (THz) waves. Such efficient conversion is made possible by use of a reststrahlen band in the THz region to achieve phase matching in an isotropic crystal. A tuning range as wide as was achieved, whereas the highest output peak power reached at . To obtain such a tuning range we continuously tuned the wavelength of one coherent infrared beam within a bandwidth of .
© 2005 Optical Society of America
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