arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.07046cond-mat.mes-hall
收藏

Moiré陷阱中的MoSe$_2$/WSe$_2$层间激子与纳米腔耦合的激射

Lasing of Moiré Trapped MoSe$_2$/WSe$_2$ Interlayer Excitons Coupled to a Nanocavity

Chenjiang Qian, Mirco Troue, Johannes Figueiredo, Pedro Soubelet, Viviana Villafañe, Johannes Beierlein, Sebastian Klembt, Andreas V. Stier, Sven Höfling, Alexa… 展开作者

Chenjiang Qian, Mirco Troue, Johannes Figueiredo, Pedro Soubelet, Viviana Villafañe, Johannes Beierlein, Sebastian Klembt, Andreas V. Stier, Sven Höfling, Alexander W. Holleitner, Jonathan J. Finley

AI总结:

将hBN封装的MoSe$_2$/WSe$_2$异质双层集成到高品质纳米腔中,实现了moiré陷阱层间激子的激射,发现其具有阈值行为和超线性功率依赖性,为低功耗纳米光子器件提供了新视角。

摘要:

我们通过将纯净的hBN封装的MoSe$_2$/WSe$_2$异质双层集成到高品质因子($Q>10^4$)的纳米光子腔中,实现了moiré陷阱层间激子(IXs)的激射。我们利用磁场控制腔-IX失谐,并测量其偶极耦合强度为$78 \pm 4\\ \mathrm{\mu eV}$,与理论预测的82 $\mathrm{\mu eV}$完全一致。当跃迁被调谐至与腔共振时,腔模式的发射表现出明显的阈值行为。我们观察到超线性的功率依赖性,伴随着线宽变窄,作为激射的显著特征。这些阈值行为的起始和突出在共振时显著,而在失谐时较弱。我们的结果表明,在相互作用moiré IXs中可以诱导激射跃迁,其宏观相干性延伸至腔模式的长度尺度。此类系统为使用二维材料的低功耗开关和突触纳米光子器件提供了有趣的视角。

英文摘要:

We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe$_2$/WSe$_2$ heterobilayer into a high-$Q$ ($>10^4$) nanophotonic cavity. We control the cavity-IX detuning using a magnetic field and measure their dipolar coupling strength to be $78 \pm 4\ \mathrm{μeV}$, fully consistent with the 82 $\mathrm{μeV}$ predicted by theory. The emission from the cavity mode shows clear threshold-like behavior as the transition is tuned into resonance with the cavity. We observe a superlinear power dependence accompanied by a narrowing of the linewidth as the distinct features of lasing. The onset and prominence of these threshold-like behaviors are pronounced at resonance while weak off-resonance. Our results show that a lasing transition can be induced in interacting moiré IXs with macroscopic coherence extending over the length scale of the cavity mode. Such systems raise interesting perspectives for low-power switching and synaptic nanophotonic devices using two-dimensional materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑