Observation of hyperbolic intersubband polaritons in native-dielectric-doped van der Waals semiconductor quantum wells.

ABSTRACT: Highly doped semiconductor quantum wells (QWs) exhibit strong intersubband transitions resulting from nanoscale electron confinement. Coupling photons to these collective dipoles in this anisotropic quantum structure enables intersubband polaritons with strong nonlinear optical response and hyperbolicity. Analogous to epitaxially grown multi-quantum wells, two-dimensional (2D) van der Waals (vdW) semiconductor heterostructures provide a compelling alternative platform, offering additional degrees of freedom and exceptional optoelectronic properties. Here we report intersubband polaritons in multilayer vdW WSe₂ QWs with broadband tunability. By oxidizing the top WSe₂ layer into a self-limiting native oxide, we activate charge transfer-induced efficient, high-density do

SUBMITTER: Luo Y 

PROVIDER: S-EPMC12630684 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature