Enhancing interlayer exciton dynamics by coupling with monolithic cavities via the field-induced Stark effect

IF 38.1 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nature nanotechnology Pub Date : 2025-07-17 DOI:10.1038/s41565-025-01969-2

Edoardo Lopriore, Fedele Tagarelli, Jamie M. Fitzgerald, Juan Francisco Gonzalez Marin, Kenji Watanabe, Takashi Taniguchi, Ermin Malic, Andras Kis

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Abstract

Optical microcavities provide a powerful and versatile framework for manipulating the dynamics of photonic emission from optically active materials through light recirculation. Spatially indirect interlayer excitons (IXs) exhibit broad tunability of their emission energy via the quantum-confined Stark effect. However, the electrical tunability of IXs has not been exploited in cavity-coupled systems until now. Here we modulate the detuning between the cavity resonance and the IX emission in a monolithic Fabry–Perot cavity using an applied vertical electric field. We reveal a simultaneous enhancement of both the emission intensity and lifetime of weakly coupled IXs when in resonance with the optical cavity owing to strong Purcell inhibition and cavity transparency effects. We further investigate the tunable momentum dispersion of coupled IXs through back-focal-plane imaging and explain our results by the cavity coupling of IX transition dipoles as supported by theoretical modelling. Our work demonstrates an integration effort enabling the versatile tuning of highly interacting IXs within monolithic cavities, revealing the attractiveness of electrically tunable IX cavity coupling for both fundamental studies towards exciton condensate manipulation and future integration of excitonic devices.

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通过场致Stark效应与单片腔耦合增强层间激子动力学

光学微腔为通过光再循环操纵光活性材料的光子发射动力学提供了一个强大而通用的框架。空间间接层间激子（IXs）通过量子受限Stark效应表现出其发射能量的广泛可调性。然而，到目前为止，IXs的电可调性尚未在腔耦合系统中得到充分利用。本文利用垂直电场调制单片法布里-珀罗腔腔谐振与IX发射之间的失谐。我们发现弱耦合IXs在与光学腔共振时，由于强珀塞尔抑制和腔透明效应，发射强度和寿命同时增强。我们通过后焦平面成像进一步研究了耦合IX的可调谐动量色散，并通过理论模型支持的IX跃迁偶极子的腔耦合来解释我们的结果。我们的工作证明了集成工作能够在单片腔内对高度相互作用的IX进行通用调谐，揭示了电可调谐IX腔耦合对激子凝聚操纵和激子器件未来集成的基础研究的吸引力。

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

Nature nanotechnology 工程技术-材料科学：综合

CiteScore

59.70

自引率

0.80%

发文量

196

审稿时长

4-8 weeks

期刊介绍： Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.