Lasing of moiré trapped MoSe<sub>2</sub>/WSe<sub>2</sub> interlayer excitons coupled to a nanocavity.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38198542.
- Also identified by DOI 10.1126/sciadv.adk6359 and PMC identifier 10780878.
- Licence recorded as CC BY-NC.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe<sub>2</sub>/WSe<sub>2</sub> heterobilayer into a high-<i>Q</i> (>10<sup>4</sup>) nanophotonic cavity. We control the cavity-IX detuning using a magnetic field and measure their dipolar coupling strength to be 78 ± 4 micro-electron volts, fully consistent with the 82 micro-electron volts 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.