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Title: A novel theoretical model for broadband blue InGaN/GaN superluminescent light emitting diodes

A broadband superluminescent light emitting diode with In{sub 0.2}Ga{sub 0.8}N/GaN multiple quantum wells (MQWs) active region is investigated. The investigation is based on a theoretical model which includes the calculation of electronic states of the structure, rate equations, and the spectral radiation power. Two rate equations corresponding to MQW active region and separate confinement heterostructures layer are solved self-consistently with no-k selection wavelength dependent gain and quasi-Fermi level functions. Our results show that the superluminescence started in a current of ∼120 mA (∼7.5 kA/Cm{sup 2}) at 300 K. The range of peak emission wavelengths for different currents is 423–426 nm and the emission bandwidth is ∼5 nm in the superluminescence regime. A maximum light output power of 7.59 mW is obtained at 600 mA and the peak modal gain as a function of current indicates logarithmic behavior. Also, the comparison of our calculated results with published experimental data is shown to be in good agreement.
Authors:
 [1] ;  [2] ;  [2] ;  [3]
  1. Photonics-Electronics Group, Aras International Campus, University of Tabriz, Tabriz 51666-14766 (Iran, Islamic Republic of)
  2. Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz 51665-163 (Iran, Islamic Republic of)
  3. (Australia)
Publication Date:
OSTI Identifier:
22413057
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; ELECTRIC CURRENTS; ELECTRONIC STRUCTURE; EMISSION; FERMI LEVEL; GAIN; GALLIUM NITRIDES; HETEROJUNCTIONS; INDIUM COMPOUNDS; LAYERS; LIGHT EMITTING DIODES; LUMINESCENCE; QUANTUM WELLS; REACTION KINETICS; VISIBLE RADIATION