具有增强光致发光性能的拉伸应变GeSn/Ge卷曲纳米膜。

IF 3.1 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2025-06-15 DOI:10.1364/OL.560771

You Jin Kim, Yu-Cheng Yeh, Po-Rei Huang, Guo-En Chang, Munho Kim

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引用次数: 0

摘要

我们提出了一种旨在增强其光致发光（PL）的卷曲GeSn/Ge纳米膜的开发。制造过程包括在绝缘体上硅（SOI）衬底上生长GeSn/Ge/Si异质结构，然后进行选择性蚀刻以释放纳米膜。拉曼测量证实，这一过程产生了一种卷起来的结构，不仅可以放松GeSn层的压缩应变，还可以在GeSn层上获得拉伸应变。PL测量显示发射峰从2361 nm红移到2719 nm，表明带隙能量降低到0.456 eV。此外，与生长样品相比，发光强度增加了160%，突出了由于拉伸应变增强了带隙的直接性而提高的发光效率。

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Tensile-strained GeSn/Ge rolled-up nanomembrane with enhanced photoluminescence.

We present the development of a rolled-up GeSn/Ge nanomembrane designed to enhance its photoluminescence (PL). The fabrication process involves growing a GeSn/Ge/Si heterostructure on a silicon-on-insulator (SOI) substrate, followed by selective etching to release the nanomembrane. This process results in a rolled-up configuration, which not only relaxes the compressive strain but also achieves tensile strain on the GeSn layer, confirmed by Raman measurements. PL measurements exhibit a redshift in emission peak from 2361 to 2719 nm, indicating a reduction in bandgap energy to 0.456 eV. Additionally, PL intensity increases by 160% compared to the as-grown sample, highlighting the enhanced light emission efficiency owing to enhanced directness of bandgap by tensile strain.

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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.