Terahertz Waveforms Manipulation by Two Orthogonal-Polarized Femtosecond Pulses

¹Terahertz Science and Technology Research Center, Shandong University of Science and Technology, Qingdao 266510
²Qingdao Key Laboratory of Terahertz Technology, Qingdao 266510
³Terahertz Science and Technology Research Center, University of Electronic Science and Technology of China, Chengdu 610054

Received Date: January 06, 2011

Published Date: May 31, 2011

Abstract

We present a method of terahertz generation in which both the amplitude and polarity of the terahertz pulse can be manipulated. A pair of temporally separated and orthogonally polarized collinear propagating femtosecond pulses with the same central frequencies are focused onto a (110) oriented ZnTe crystal. By adjusting the relative time delay between the pulses, the amplitude and polarity of the generated terahertz pulse based on difference frequency generation can be controlled. Theoretical derivation and simulation based on the one-dimensional propagation equation of the terahertz wave are carried out under simplified conditions of perfect phase matching, plane-wave approximation and no absorption.

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