Design of superperiodic photonic-crystal light-emitting plates with highly directive luminance characteristics
- 28 January 2009
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 26 (2), 328-336
- https://doi.org/10.1364/josab.26.000328
Abstract
A “superperiodic” photonic-crystal (PhC) light-emitting diode (LED) design exhibiting high-luminance patterns is proposed for applications that require highly directive vertical light extraction. The superperiodic design employs a periodic arrangement of defective missing holes on an otherwise perfect periodic pattern of holes for the basic two-dimensional PhC structure. Avoiding the fragile semiconductor membrane structure that is popular in current PhC laser designs, the design utilizes a thick epitaxy structure with electromagnetic density-of-mode singularity. This singularity is created by the defect mode in a three-dimensional frequency versus wave vector relation within the band matched with the gain spectrum of the LED that is placed on top of the base reflector plate material. The superperiodic structure of this design is shown to provide an effective means for sharpening the vertical beam in the far field, based on discrete-Fourier transformation theory. Subsequent simulations based on the finite-difference time-domain analysis verify the effectiveness of the design principle on GaN epitaxy structures with various bottom layers.Keywords
Funding Information
- Korea Research Foundation (KRF) (KRF-2008-314-C00083)
This publication has 19 references indexed in Scilit:
- Theoretical demonstration of enhancement of light extraction of flip-chip GaN light-emitting diodes with photonic crystalsApplied Physics Letters, 2006
- Enhanced light extraction from GaN-based light-emitting diodes with holographically generated two-dimensional photonic crystal patternsApplied Physics Letters, 2005
- Photonic bands in two-dimensionally patterned multimode GaN waveguides for light extractionApplied Physics Letters, 2005
- Far-field radiation of photonic crystal organic light-emitting diodeOptics Express, 2005
- Photonic crystal nanocavity array laserOptics Express, 2005
- Two-dimensional coupled photonic crystal resonator arraysApplied Physics Letters, 2004
- Rigorous electromagnetic analysis of dipole emission in periodically corrugated layers: the grating-assisted resonant-cavity light-emitting diodeJournal of the Optical Society of America A, 2002
- Highly directive light sources using two-dimensional photonic crystal slabsApplied Physics Letters, 2001
- High Extraction Efficiency of Spontaneous Emission from Slabs of Photonic CrystalsPhysical Review Letters, 1997
- High-brightness, AlGaInP-based, visible light-emitting diode for efficient coupling with POFIEEE Photonics Technology Letters, 1995