Rigorous Optical Modeling of Circularly Polarized Light-Emitting Devices: Interaction of Emitters with Device Geometries

Yongmoon Lee,Hyungchae Kim,Changsoon Kim

ACS PHOTONICS（2023）

Cited 1|Views7

Abstract

Despite ongoing efforts to developcircularly polarized light (CPL)emitters, achieving a high dissymmetry factor in electroluminescence(g (EL)) for circularly polarized light-emittingdevices (CP-LEDs) remains a challenge. Here, we investigate the impactof CPL emitter type and device geometry on the performance of CP-LEDs.The optical modeling widely applied to thin-film LEDs is extendedto calculate the electric fields generated by CPL emitters describedby a coherent combination of two linearly polarized oscillating dipoles,while incorporating the effect of an incoherent substrate on g (EL) and the external quantum efficiency (& eta;(EQE)). Our findings show that the impact of a reflective metalelectrode, which is distinct for different types of CPL emitters,is crucial in determining g (EL) and & eta;(EQE). Based on our results, we emphasize the importance of aCPL emitter described by two electric dipoles (instead of an electricand a magnetic dipole) that generates photons with a specific spinangular momentum for achieving both high g (EL) and & eta;(EQE). Our theoretical method offers an accurateframework for the optical modeling of CP-LEDs needed for their designand optimization.

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Key words

circularly polarized emitters,circular polarization,chirality,dipole simulation,optical modeling,circularly polarized light-emittingdevices

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