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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 28, Iss. 8 — Apr. 15, 2010
  • pp: 1190–1200

Finite-Difference Time-Domain Modeling of Periodic and Disordered Surface Gratings in AlInSb Light Emitting Diodes With Metallic Back-Reflectors

Ian J. Buss, Geoffrey R. Nash, John G. Rarity, and Martin J. Cryan

Journal of Lightwave Technology, Vol. 28, Issue 8, pp. 1190-1200 (2010)

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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 $\lambda_{0}= 4 \ \mu$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 ${\sim} {\hbox {20}}$-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.

© 2010 IEEE

Ian J. Buss, Geoffrey R. Nash, John G. Rarity, and Martin J. Cryan, "Finite-Difference Time-Domain Modeling of Periodic and Disordered Surface Gratings in AlInSb Light Emitting Diodes With Metallic Back-Reflectors," J. Lightwave Technol. 28, 1190-1200 (2010)

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