Multifunctional ultrawideband terahertz metasurfaces with full space modulation

IF 4.6 2区 物理与天体物理 Q1 OPTICS
Lei Fan, Wangting Fu, Shan Huang, Xingfang Luo
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引用次数: 0

Abstract

In the field of metasurface technology, it is a major challenge to realize full-space multifunctional integration under ultra-wide bandwidth. In this study, we propose an innovative full-space terahertz (THz) metasurface design strategy that utilizes the cascaded mirror Fabry-Perot (F-P) cavity structure combined with the phase transition properties of vanadium dioxide (VO2) to realize dynamic functional modulation of the metasurface in full space over an ultra-wide bandwidth. The proposed metasurface demonstrates exceptional capabilities within the 0.9–1.9 THz range, including polarization conversion (PC) for both linearly and circularly polarized waves in reflection mode, linear-to-circular polarization conversion (LTCPC), asymmetric transmission (AT), and circular dichroism (CD). Particularly noteworthy is the ability of the metasurface to work not only on transmission or reflection space alone, but also to modulate both spaces simultaneously. In order to demonstrate its full-space modulation capability in a wide bandwidth, the generation of a focused vortex beam is realized in the upper surface, and high-quality imaging is achieved in the lower surface space. Meanwhile, by adjusting the relative rotation angles of the metal layer structures, efficient PC is achieved in the reflection space and circular dichroism is exhibited in the transmission space. This design, characterized by full-space tunability and multifunctionality, offers innovative approaches for THz device integration and application while providing valuable insights for future optical device design.
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来源期刊
CiteScore
8.50
自引率
10.00%
发文量
1060
审稿时长
3.4 months
期刊介绍: Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems
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