具有宽量子阱的极性InGaN/GaN结构中的快速非平衡载流子动力学

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-22 DOI:10.1063/5.0259804

Jens W. Tomm, Konrad Sakowski, Artem Bercha, Grzegorz Muzioł, Conny Becht, Ulrich T. Schwarz, Witold Trzeciakowski

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引用次数: 0

摘要

我们分析了基于宽量子阱厚度为25 nm的450 nm发射InGaN/GaN器件结构的体状连续激发态的时间分辨光致发光（PL）。在其光谱积分形式中，PL表现得好像是由辐射复合主导的，包括反映辐射寿命的几乎指数衰减。如果对PL进行光谱分析，就会发现时间常数的谱很宽，从ps到ns。在低温下，我们检测到的PL衰减速度可达（16±2）ps。这种PL被分配到这些有前途的结构的块状准连续态中的热载流子PL。理论模型支持我们对实验结果的解释。

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Fast non-equilibrium carrier dynamics in polar InGaN/GaN structures with wide quantum wells

We analyze the time-resolved photoluminescence (PL) from the bulklike continuum of excited states of 450 nm emitting InGaN/GaN device structures that are based on wide quantum wells with 25 nm thickness. In its spectrally integrated form, the PL behaves as if it were dominated by radiative recombination, including an almost exponential decay reflecting the radiative lifetime. If the PL is resolved spectrally, a very broad spectrum of time constants is found, from ps to ns. At low temperatures, we detected PL decay as fast as (16 ± 2) ps. This PL is assigned to hot carrier PL within the bulklike quasi-continuum of states of these promising structures. Theoretical modeling supports this interpretation of our experimental results.

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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.