Lasing of Moiré Trapped MoSe$_2$/WSe$_2$ Interlayer Excitons Coupled to a Nanocavity
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arXiv
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| Format: | Preprint |
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2023
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| author | Qian, Chenjiang Troue, Mirco Figueiredo, Johannes Soubelet, Pedro Villafañe, Viviana Beierlein, Johannes Klembt, Sebastian Stier, Andreas V. Höfling, Sven Holleitner, Alexander W. Finley, Jonathan J. |
| author_facet | Qian, Chenjiang Troue, Mirco Figueiredo, Johannes Soubelet, Pedro Villafañe, Viviana Beierlein, Johannes Klembt, Sebastian Stier, Andreas V. Höfling, Sven Holleitner, Alexander W. Finley, Jonathan J. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_07046 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Lasing of Moiré Trapped MoSe$_2$/WSe$_2$ Interlayer Excitons Coupled to a Nanocavity Qian, Chenjiang Troue, Mirco Figueiredo, Johannes Soubelet, Pedro Villafañe, Viviana Beierlein, Johannes Klembt, Sebastian Stier, Andreas V. Höfling, Sven Holleitner, Alexander W. Finley, Jonathan J. Mesoscale and Nanoscale Physics 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. |
| title | Lasing of Moiré Trapped MoSe$_2$/WSe$_2$ Interlayer Excitons Coupled to a Nanocavity |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2302.07046 |