Tsinghua University

Ru-Pin Pan

Ci-Ling Pan

Chan-Shan Yang

Cho-Fan Hsieh

Tsung-Ta Tang

Pei-Chen Yu

Fang-Cih Shih

A tunable terahertz achromatic wave plate including at least three phase retarders and a tuning device is provided. The at least three phase retarders are sequentially arranged along a first direction, and configured to provide an achromatic range in a terahertz band, so as to reduce a chromatic aberration of a terahertz wave through the tunable terahertz achromatic wave plate in the achromatic range. The at least three phase retarders respectively include a liquid crystal cell. The tuning device is configured to tune a liquid crystal orientation angle of the liquid crystal cell, so as to correspondingly change a birefringence of the at least three phase retarders in the terahertz band. The terahertz wave through the tunable terahertz achromatic wave plate has same phase retardation in the achromatic range. The achromatic range in the terahertz band is determined according to the birefringence of the at least three phase retarders.

Tunable terahertz achromatic wave plate and a terahertz achromatic range tuning method

The invention provides a liquid crystal based optoelectronic device, including an upper substrate and a lower substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, and a pair of indium tin oxide nano-whisker layers formed on the inner surfaces of the upper substrate and the lower substrate, wherein the indium tin oxide nano-whisker layer is used as an alignment layer for aligning liquid crystal molecules in the liquid crystal layer.

Liquid crystal based optoelectronic device

Growing community of inventors

Hsinchu, Taiwan

Ru-Pin Pan