Achromatic Terahertz Quarter Waveplate Based on Silicon Grating

Achromatic Terahertz Quarter Waveplate Based on Silicon Grating
Title:
Achromatic Terahertz Quarter Waveplate Based on Silicon Grating
Other Titles:
Optics Express
DOI:
10.1364/OE.23.014897
Publication Date:
29 May 2015
Citation:
Banghong Zhang and Yandong Gong, "Achromatic terahertz quarter waveplate based on silicon grating," Opt. Express 23, 14897-14902 (2015)
Abstract:
In this paper, an achromatic quarter waveplate scheme at terahertz frequency range is proposed. The waveplate is based on a silicon grating with large fill factor and period close to the wavelengths of the terahertz wave. Owing to the grating structure, the frequency dependence of waveplate is compensated. An achromatic QWP is fabricated and experimentally demonstrated to show an excellent wideband feature at the range of [0.47, 0.8] THz, which is more than 6 times wider than a conventional QWP working at single frequency 0.5 THz, by assuming ± 3% variance of phase retardation.
License type:
PublisherCopyrights
Funding Info:
Description:
© 2015 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
ISSN:
1094-4087
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