Abstract
We propose and demonstrate an electrically controlled liquid crystal phase grating for the terahertz wave. The performance of the device was characterized by a terahertz time-domain spectrometer. The experimental results were in a good agreement with the prediction by classic diffraction theory.
Acknowledgments
This work was supported in part by the National Science Council grants NSC 95-2221-E-009-249, PPAEU-II and the ATU program of the Ministry of Education, Taiwan, Republic of China.