Continuously tunable intensity modulators with large switching contrasts using liquid crystal elastomer films that are deposited with terahertz metamaterials

Wei Fan Chiang, Harry Miyosi Silalahi, Yu Chih Chiang, Mi Chia Hsu, Yan Song Zhang, Jui Hsiang Liu, Yanlei Yu, Chia Rong Lee, Chia Yi Huang

研究成果: Article同行評審

摘要

A liquid crystal elastomer (LCE) film is successfully deposited with a terahertz metamaterial using thermal evaporation via a programmed electronic shutter and high-efficiency cooling system. The transmittance of the metamaterial at its resonance frequency is monotonically increased from 0.0036 to 1.0 as a pump beam bends the LCE film, so the metamaterial has a large switching contrast of 277 at the frequency. The monotonic increase in the resonance transmittance arises from the constant resonance frequency of the metamaterial at the transmittance modulation and depicts that the metamaterial-deposited LCE film can continuously tune the transmitted intensity of a terahertz beam. The metamaterial-deposited LCE film has potential in developing continuously tunable intensity modulators with large switching contrasts for the application of terahertz imaging and terahertz communication. Therefore, the thermal evaporation expands the application of metamaterials and improves their optical properties.

原文English
頁(從 - 到)27676-27687
頁數12
期刊Optics Express
28
發行號19
DOIs
出版狀態Published - 2020 九月 14

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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