Multifunctional manipulations of full-space terahertz beams based on liquid-crystal-integrated multi-bit programmable metasurface

IF 2 3区物理与天体物理 Q3 OPTICS Applied Physics B Pub Date : 2024-11-27 DOI:10.1007/s00340-024-08357-z

Tengyu Wang, Chun Li, Yan Teng, Zhengwei Huang, Ling Jiang

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Abstract

Dynamic programmable metasurface (PMS) with multifunctionality has attracted attention due to its flexible abilities in manipulating terahertz (THz) beams. However, real-time control of full-space THz beams by metasurfaces still faces several technical challenges. In this study, we present a multi-bit liquid-crystal (LC) -integrated PMS that enables multifunctional manipulation of full-space THz beams. The proposed PMS is characterized by an achievable 3-bit working state and a near 315° maximum phase shift can be achieved in the range of 0.4–0.44 THz (transmission mode) and 0.7–0.72 THz (reflection mode). Metasurfaces can manipulate the transmissive and reflective beams by dynamically switching array encoding, allowing for multifunctional manipulation of full-space THz beams. To better demonstrate the advantages of multifunctional integration of the device, various functions are realized by dynamically manipulating the coding pattern of the PMS, including beam steering, orbital angular momentum (OAM), and holography. This work is expected to advance the application of PMS in full-space THz beam manipulation devices.

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基于液晶集成多比特可编程元表面的全空间太赫兹光束多功能操纵装置

具有多功能性的动态可编程元表面（PMS）因其在操纵太赫兹（THz）光束方面的灵活能力而备受关注。然而，元表面对全空间太赫兹光束的实时控制仍面临着一些技术挑战。在本研究中，我们提出了一种集成多位液晶（LC）的 PMS，可实现对全空间太赫兹光束的多功能操纵。所提出的 PMS 具有可实现 3 位工作状态的特点，可在 0.4-0.44 THz（传输模式）和 0.7-0.72 THz（反射模式）范围内实现接近 315° 的最大相移。元表面可以通过动态切换阵列编码来操纵透射和反射光束，从而实现全空间太赫兹光束的多功能操纵。为了更好地展示该装置多功能集成的优势，通过动态操控 PMS 的编码模式实现了各种功能，包括光束转向、轨道角动量（OAM）和全息摄影。这项工作有望推动 PMS 在全空间太赫兹光束操纵设备中的应用。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.