Multimode phonon-polaritons in lead-halide perovskites in the ultrastrong coupling regime
We fabricated an array of nanoslots (w = 950 nm) on quartz substrates with seven different lengths (l = 30, 40,…
Ultraconfined terahertz phonon polaritons in hafnium dichalcogenides
Li, N. et al. Direct observation of highly confined phonon polaritons in suspended monolayer hexagonal boron nitride. Nat.…
A lithography-free approach to polaritonic Luneburg lenses
Gradient indices from dielectric environment engineering The propagation of polaritons is significantly influenced by the surrounding dielectric environment,…
Microscopic theory of polariton group velocity renormalization
Model system We use the Generalized Holstein-Tavis-Cummings (GHTC) Hamiltonian23,24,25,26 to describe N excitons interacting with \({{{\mathcal{M}}}}\) cavity modes,…