Lattice Constant Effect of Photonic Crystals on the Light Output of Blue Light-Emitting Diodes

Photonic crystal (PC) slabs with triangular lattice constants of 230, 345, 460, and 690 nm have been fabricated onto InGaN-GaN multiquantum-well light-emitting diodes with a wavelength of 461 nm. For the shallow nanoholes in the depth range of 10-38.5 nm, the current-voltage characteristics were not...

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Bibliographic Details
Published in:IEEE photonics technology letters 2008-09, Vol.20 (17), p.1455-1457
Main Authors: Kim, Keunjoo, Choi, Jaeho, Park, Jong Bae, Jeon, Sang Cheol, Kim, Jin Soo, Lee, Hee Mok
Format: Article
Language:English
Subjects:
Electroluminescence
Electroluminescence (EL)
Gallium nitride
Lattice parameters
Lattices
Light emitting diodes
Light sources
light-emitting diodes (LEDs)
Nanocomposites
Nanophotonics
Nanostructure
Periodic structures
Photonic crystals
Photonics
Polycarbonates
Slabs
Solid state circuits
Wavelengths
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Summary:Photonic crystal (PC) slabs with triangular lattice constants of 230, 345, 460, and 690 nm have been fabricated onto InGaN-GaN multiquantum-well light-emitting diodes with a wavelength of 461 nm. For the shallow nanoholes in the depth range of 10-38.5 nm, the current-voltage characteristics were not changed but the electroluminescence intensities were enhanced by a factor of 3.5. The light output was most enhanced with the lattice constant corresponding to the wavelength due to the PC diffraction with constructive interference but was suppressed with the lattice constant of the half wavelength by forming a photonic bandgap.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2008.927893