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Analytical treatment of light extraction from textured surfaces using classical ray optics

Authors
Journal
Optics Communications
0030-4018
Publisher
Elsevier
Publication Date
Volume
284
Issue
20
Identifiers
DOI: 10.1016/j.optcom.2011.06.062
Keywords
  • Light Out-Coupling
  • Light Emitting Devices
  • Classical Ray Optics
  • Ray Tracing

Abstract

Abstract Regular periodic textures e.g., microlens arrays, micro-pyramids, and cones on substrate surface have been used to enhance light out-coupling in light emitting devices. Photon randomization, often associated with surface roughening, has been suggested as the mechanism for out-coupling enhancement. This article analytically investigates the ray dynamics in a light emitting device when periodic texture is used as an external out-coupler. An attempt has been made to understand the relationship between enhancement in out-coupling and the surface inclination of these structures using classical ray optics.

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