Dynamically tunable and polarization-insensitive dual-band terahertz metamaterial absorber based on TiNi shape memory alloy films

Zhang, Kun; Ma, Tianyou; Liu, Juan; Tian, Xiaohua; Zhu, Jiachen; Tan, Changlong

doi:10.1016/j.rinp.2021.104001

Cited by 21 publications

(11 citation statements)

References 55 publications

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“…The relatively complex fabrication may become one limitation of SMMs-based MA in practical applications, which needs to be solved in future work. [77] Copyright 2021, The Authors, published by Elsevier. c-e) Reproduced with permission.…”

Section: Shape-memory Materialsmentioning

confidence: 99%

“…Compared to the planar arrays in MAs, the employment of SMAs facilitates 3D, structurally reconfigurable and tunable MAs, capable of tuning the absorption in a relatively larger range. [ 77,78,80 ] Phon et al. demonstrated a reconfigurable MM comprising of helical SMA.…”

Section: Periodic Patterns For Tunable/reconfigurable Masmentioning

confidence: 99%

“…[4,62,64] In addition, broadband absorption can also be achieved by incorporating these lumped elements, followed by selecting optimized values of these elements. [65][66][67] In addition to lumped elements, active materials including phase-change materials (PCMs), [27,30,41,[68][69][70][71] 2D materials, [18,[72][73][74][75][76] shape-memory materials (SMMs), [77][78][79][80] and liquid metals, [81][82][83] have also been explored in the design of tunable/reconfigurable MAs due to their change in electrical properties under external stimuli including heat, electric field, and light. The integration of active materials to MAs design has been found to be effective in controlling EM properties of MAs (Figure 2g) operating at frequencies from gigahertzes (GHz), terahertz (THz), infrared (IR) and even to optical regimes.…”

Section: Tuning Theory and Approaches In Masmentioning

confidence: 99%

“…To achieve tunable absorption, Zhang et al proposed a tunable THz MA with dual-band absorption using crossing-shape SMA as tuning elements, as illustrated in Figure 7a. [77] The nickeltitanium (NiTi) SMA was favorable for MA designs due to its unique properties, including large deformation, shape-memory effect under variable temperature, and giant resistance change among different phases. By applying a thermal field to NiTi SMA, the effective angle (θ) of the crossing arms was continuously changed, leading to a frequency shift.…”

Section: Shape-memory Materialsmentioning

confidence: 99%

“…a,b) Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International license ( https://creativecommons.org/licenses/by/4.0). [ 77 ] Copyright 2021, The Authors, published by Elsevier. c–e) Reproduced with permission.…”

Section: Periodic Patterns For Tunable/reconfigurable Masmentioning

confidence: 99%

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Metamaterial Absorbers: From Tunable Surface to Structural Transformation

et al. 2022

Advanced Materials

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Since the first demonstration, remarkable progress has been made in the theoretical analysis, structural design, numerical simulation, and potential applications of metamaterial absorbers (MAs). With the continuous advancement of novel materials and creative designs, the absorption of MAs is significantly improved over a wide frequency spectrum from microwaves to the optical regime. Further, the integration of active elements into the MA design allows the dynamical manipulation of electromagnetic waves, opening a new platform to push breakthroughs in metadevices. In the last several years, numerous efforts have been devoted to exploring innovative approaches for incorporating tunability to MAs, which is highly desirable because of the progressively increasing demand on designing versatile metadevices. Here, a comprehensive and systematical overview of active MAs with adaptive and on‐demand manner is presented, highlighting innovative materials and unique strategies to precisely control the electromagnetic response. In addition to the mainstream method by manipulating periodic patterns, two additional approaches, including tailoring dielectric spacer and transforming overall structure are called back. Following this, key parameters, such as operating frequency, relative tuning range, and switching speed are summarized and compared to guide for optimum design. Finally, potential opportunities in the development of active MAs are discussed.

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Section: Shape-memory Materialsmentioning

confidence: 99%

Section: Periodic Patterns For Tunable/reconfigurable Masmentioning

confidence: 99%

Section: Tuning Theory and Approaches In Masmentioning

confidence: 99%

Section: Shape-memory Materialsmentioning

confidence: 99%

Section: Periodic Patterns For Tunable/reconfigurable Masmentioning

confidence: 99%

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Metamaterial Absorbers: From Tunable Surface to Structural Transformation

et al. 2022

Advanced Materials

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Reconfigurable Micro/Nano‐Optical Devices Based on Phase Transitions: From Materials, Mechanisms to Applications

Li,

Pan,

et al. 2024

Advanced Science

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In recent years, numerous efforts have been devoted to exploring innovative micro/nano‐optical devices (MNODs) with reconfigurable functionality, which is highly significant because of the progressively increasing requirements for next‐generation photonic systems. Fortunately, phase change materials (PCMs) provide an extremely competitive pathway to achieve this goal. The phase transitions induce significant changes to materials in optical, electrical properties or shapes, triggering great research interests in applying PCMs to reconfigurable micro/nano‐optical devices (RMNODs). More specifically, the PCMs‐based RMNODs can interact with incident light in on‐demand or adaptive manners and thus realize unique functions. In this review, RMNODs based on phase transitions are systematically summarized and comprehensively overviewed from materials, phase change mechanisms to applications. The reconfigurable optical devices consisting of three kinds of typical PCMs are emphatically introduced, including chalcogenides, transition metal oxides, and shape memory alloys, highlighting the reversible state switch and dramatic contrast of optical responses along with designated utilities generated by phase transition. Finally, a comprehensive summary of the whole content is given, discussing the challenge and outlooking the potential development of the PCMs‐based RMNODs in the future.

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