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Proceedings Article

Quantum well design and diffraction efficiency of quantum well light emitting diode

[+] Author Affiliations
Milad Khoshnegar, Amin Eftekharian, Majid Sodagar, Sina Khorasani

Sharif Univ. of Technology (Iran, Islamic Republic of)

Ali Adibi

Georgia Institute of Technology (USA)

Proc. SPIE 7223, Photonic and Phononic Crystal Materials and Devices IX, 722311 (February 16, 2009); doi:10.1117/12.809480
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From Conference Volume 7223

  • Photonic and Phononic Crystal Materials and Devices IX
  • Ali Adibi; Shawn-Yu Lin; Axel Scherer
  • San Jose, CA | January 24, 2009

abstract

In this work, a GaN-based quantum well LED is theoretically analyzed in a multi-layer structure composed of a quantum well embedded in a waveguide core surrounded by photonic crystal slab and a sapphire substrate. The electromagnetic eigenmodes are obtained throughout above structure via revised plane wave-scattering matrix method. The omnidirectional transmission and reflection are investigated for both TE and TM polarizations from diffraction channels in Ewald construction. Then, we introduced angular power density and calculated radiative modes extraction efficiency. All structural parameters, such as lattice geometry, lattice constant, photonic crystal thickness and filling factor, are taken into account. We also investigated the coupling efficiency between waveguide modes and Bloch modes in structure which include decomposed emission and extraction regions. In order to design a quantum well white LED, we used a MQW with adjusted material composition. The photoluminescence spectrum for both TE and TM polarizations is obtained through a combination of k.p perturbation and transfer matrix method.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Milad Khoshnegar ; Amin Eftekharian ; Majid Sodagar ; Sina Khorasani and Ali Adibi
"Quantum well design and diffraction efficiency of quantum well light emitting diode", Proc. SPIE 7223, Photonic and Phononic Crystal Materials and Devices IX, 722311 (February 16, 2009); doi:10.1117/12.809480; http://dx.doi.org/10.1117/12.809480


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