Design of an optically transparent ultrawideband absorber with high angular stability using ITO films.

IF 3.1 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2024-11-15 DOI:10.1364/OL.540053

Han Jian, Rui Yang, Shiyong Sun

引用次数: 0

Abstract

In this paper, an optically transparency ultrawideband absorber with high angular stability is designed. The proposed absorber is composed of two different materials with indium thin oxide (ITO) conductive films and polydimethylsiloxane (PDMS) substrates. With the aid of a stacked structure design, the absorber has a 90% absorption band from 5 to 43.5 GHz and the fractional bandwidth reaches 158.7%. Also, for the TE mode, the absorption remains stable with the oblique incident angles reaching 50°. And similar angular stability can be observed for the TM mode from 0° to 70°. Besides, the thickness of the absorber is only 0.092 wavelength and transmittance within the visible band is 57.3%. For further verification, a prototype is fabricated and measured. Good agreements between the simulated and the measured results can be observed.

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利用 ITO 薄膜设计具有高角度稳定性的光学透明超宽带吸收器。

本文设计了一种具有高角度稳定性的光学透明超宽带吸收器。所提出的吸收器由两种不同的材料组成：氧化铟薄膜（ITO）导电膜和聚二甲基硅氧烷（PDMS）基底。借助叠层结构设计，该吸收器在 5 至 43.5 GHz 范围内具有 90% 的吸收带，分数带宽达到 158.7%。此外，对于 TE 模式，在斜入射角度达到 50° 时，吸收仍然保持稳定。对于 TM 模式，在 0° 至 70° 范围内也能观察到类似的角度稳定性。此外，吸收器的厚度仅为 0.092 波长，在可见光波段内的透射率为 57.3%。为了进一步验证，我们制作并测量了一个原型。模拟结果和测量结果之间的一致性很好。

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

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.