Fig. 5
From: Layered van der Waals crystals with hyperbolic light dispersion
Reduced quenching of spontaneous emission. Reduced optical losses in 2H-HfBrS compared to 2H-TaS2 significantly reduces the associated quenching of spontaneous emission, which is evident when comparing a Purcell factors of 50 nm thin films with b the imaginary part of their dielectric functions
