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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 26, Iss. 17 — Sep. 1, 2008
  • pp: 3131–3136

Nitride-Based LEDs With a Hybrid Al Mirror $+ {\hbox {TiO}} _{2} /{\hbox {SiO}}_{2}$ DBR Backside Reflector

S. J. Chang, C. F. Shen, M. H. Hsieh, C. T. Kuo, T. K. Ko, W. S. Chen, and S. C. Shei

Journal of Lightwave Technology, Vol. 26, Issue 17, pp. 3131-3136 (2008)


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Abstract

Nitride-based light-emitting diodes (LEDs) with a hybrid backside reflector combining a ${\hbox {TiO}} _{2} /{\hbox {SiO}}_{2}$ distributed Bragg reflector (DBR) and an Al mirror were proposed and realized. It was found that we can significantly enhance the 35% reflectivity of the 2-pair ${\hbox {TiO}} _{2} /{\hbox {SiO}}_{2}$ DBR to 94% by combining with Al mirror (hybrid reflector). Furthermore, reflectivity of the proposed reflector depends only slightly on incident light wavelength and the incident angle. With 350-mA current injection, it was found that the output powers were 145.7, 178.2, and 201.9 mW for the LEDs with 2-pair DBR, with an Al mirror and with a hybrid reflector, respectively, when packaged in TO-cups. It was also found that reliability for the LED with the hybrid reflector is good.

© 2008 IEEE

Citation
S. J. Chang, C. F. Shen, M. H. Hsieh, C. T. Kuo, T. K. Ko, W. S. Chen, and S. C. Shei, "Nitride-Based LEDs With a Hybrid Al Mirror $+ {\hbox {TiO}} _{2} /{\hbox {SiO}}_{2}$ DBR Backside Reflector," J. Lightwave Technol. 26, 3131-3136 (2008)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-26-17-3131

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