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Finite-difference time domain modeling of periodic and disordered surface gratings in AlInSb light emitting diodes with metallic back-reflectors

Research output: Contribution to journalArticle

Original languageEnglish
Pages1190 - 1200
Number of pages11
JournalIEEE Journal of Lightwave Technology
Journal publication dateApr 2010
Volume28
Journal issue8
DOIs
StatePublished

Abstract

Two-dimensional finite-difference time-domain modeling is undertaken to study the optical behaviour of midinfrared AlInSb light-emitting diode devices with close metallic back reflectors. The location of the source and mirror is investigated in detail and optimised for peak emission at ¿0 = 4 ¿m. A periodic surface grating is added and it is found that greater than 98% of the light at a specific wavelength may be extracted for specific grating parameters, an enhancement of ~ 20-fold. A novel type of grating termed disordered-periodic is then studied and is shown to have a much broader spectral response with more than 50% of the power extracted across a broad wavelength range.

Additional information

Publisher: IEEE Rose publication type: Journal article Terms of use: Copyright © 2010 IEEE. Reprinted from Journal of Lightwave Technology. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • finite-difference time-domain modeling, light-emitting diodes, integrated optoelectronics

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