Ultra-wideband and angular-stable Terahertz reflective cross-polarization converter integrated with highly sensitive biosensing

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-06-27 DOI:10.1016/j.materresbull.2025.113641

Bo Lv , Taha Sheheryar , Jacob Wekalao , Lei Gao

引用次数: 0

Abstract

This paper presents a reflective metasurface device that simultaneously achieves ultra-wideband polarization conversion and high-sensitivity biosensing, overcoming major limitations in existing terahertz platforms. Unlike conventional approaches that rely on noble metals or provide narrow operational bandwidths, the presented design utilizes low-cost aluminum and polyimide while maintaining exceptional performance. It exhibits a polarization conversion ratio exceeding 90 % over a 3.044 THz bandwidth with peak efficiencies up to 99.9 % and strong angular stability up to 40° For biosensing, the design attains a sensitivity of up to 0.95 THz/RIU, allowing reliable detection of minute refractive index changes associated with several cancer types. The integration of wideband polarization conversion and biosensing in a cost-effective format provides strong potential for next-generation biomedical diagnostics and terahertz sensing.

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集成高灵敏度生物传感的超宽带角稳定太赫兹反射交叉极化变换器

本文提出了一种同时实现超宽带偏振转换和高灵敏度生物传感的反射超表面器件，克服了现有太赫兹平台的主要局限性。与依赖贵金属或提供狭窄操作带宽的传统方法不同，该设计利用低成本的铝和聚酰亚胺，同时保持卓越的性能。在3.044 THz带宽范围内，其极化转换率超过90%，峰值效率高达99.9%，角稳定性高达40°。对于生物传感，该设计的灵敏度高达0.95 THz/RIU，可以可靠地检测与几种癌症类型相关的微小折射率变化。宽带极化转换和生物传感以经济有效的形式集成为下一代生物医学诊断和太赫兹传感提供了强大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.