Enhancement of surface acoustic wave amplification by drifting electrons in graphene under microwave irradiation

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-10-08 DOI:10.1063/5.0288464

Vl. A. Margulis, E. E. Muryumin

引用次数: 0

Abstract

This paper analyzes the effect of microwave irradiation on the amplification of surface acoustic waves (SAWs) by drifting electrons in graphene. An expression is obtained for the SAW gain G as a function of the frequency and intensity of microwaves, the electron drift velocity, and the parameters of the considered graphene/piezoelectric substrate hybrid structure. Our calculations show that in the presence of microwave radiation incident normally on the graphene layer and polarized along the direction of SAW propagation, the SAW gain G, measured in units of dB/cm, can be several times greater than in the presence of only an applied dc electric field causing electron drift. The results obtained indicate an effective way to improve the performance of ultra-compact graphene-based SAW amplifiers.

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微波辐照下石墨烯中电子漂移增强表面声波放大

本文分析了微波辐照对石墨烯中电子漂移对表面声波放大的影响。得到了SAW增益G与微波频率和强度、电子漂移速度以及石墨烯/压电基板杂化结构参数的函数表达式。我们的计算表明，在微波辐射正常入射到石墨烯层并沿声SAW传播方向极化的情况下，声SAW增益G（以dB/cm为单位测量）可能比仅施加直流电场导致电子漂移的情况大几倍。研究结果为提高超紧凑石墨烯基SAW放大器的性能提供了一条有效途径。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.