Non-Hermitian dispersion sign reversal of radiative resonances in two dimensions
Non-Hermitian dispersion sign reversal of radiative resonances in two dimensions
复制标题
DOI：
10.1103/physrevb.109.125301
复制
发表时间：
2023-08
影响因子：
3.7
通讯作者：
R. Binder;J. S. Schaibley;N. Kwong
中科院分区：
文献类型：
--
作者：
R. Binder;J. S. Schaibley;N. Kwong
在最近的出版物[Wurdack等人，14：1026（2023）]，表明在含有原子薄半导体的微腔中，非厄米量子力学可导致负激子极化激元质量。我们表明，质量符号反转通常可以发生在辐射共振在两个维度（无腔），并推导出它的条件（临界退相阈值等）。在单层过渡金属二硫属化物中，这种现象不会被强的电子-空穴交换相互作用所无效，这是已知的，使激子无质量。
In a recent publication [Wurdack et al., Nat. Comm. 14:1026 (2023)], it was shown that in microcavities containing atomically thin semiconductors non-Hermitian quantum mechanics can lead to negative exciton polariton masses. We show that mass-sign reversal can occur generally in radiative resonances in two dimensions (without cavity) and derive conditions for it (critical dephasing threshold etc.). In monolayer transition-metal dichalcogenides, this phenomenon is not invalidated by the strong electron-hole exchange interaction, which is known to make the exciton massless.