Chiral electroluminescence from thin-film perovskite metacavities

Abstract

Chiral light sources realized in ultracompact device platforms are highly desirable for various applications. Among active media employed for thin-film emission devices, lead-halide perovskites have been extensively studied for photoluminescence due to their exceptional properties. However, up to date, there have been no demonstrations of chiral electroluminescence with a substantial degree of circular polarization (DCP), being critical for the development of practical devices. Here, we propose a new concept of chiral light sources based on a thin-film perovskite metacavity and experimentally demonstrate chiral electroluminescence with DCP approaching 0.38. We design a metacavity created by a metal and a dielectric metasurface supporting photonic eigenstates with close-to-maximum chiral response. Chiral cavity modes facilitate asymmetric electroluminescence of pairs of left and right circularly polarized waves propagating in the opposite oblique directions. The proposed ultracompact light sources are especially advantageous for many applications requiring chiral light beams of both helicities.

arXiv comment20 pages, 4 figures

References in corpus (6)

• Chiral plasmonics
• Metasurfaces with maximum chirality empowered by bound states in the continuum
• Circularly-Polarized Light Emission from Semiconductor Planar Chiral Photonic Crystal
• Helicity-preserving optical cavity modes for enhanced sensing of chiral molecules
• Circularly polarized electroluminescence from a single-crystal organic microcavity light-emitting diode based on photonic spin-orbit interactions
• Real-time beam-shaping without additional optical elements

Cited by in corpus (3)

• Nonlinear chiral metaphotonics
• Chiral Nonlinear Polaritonics with van der Waals Metasurfaces
• Accessible, All-Polymer Metasurfaces: Low Effort, High Quality Factor