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

Author

Kim, Keunjoo ; Choi, Jaeho ; Park, Jong Bae ; Jeon, Sang Cheol ; Kim, Jin Soo ; Lee, Hee Mok

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI

Volume

20

Issue

17

fYear

2008

Firstpage

1455

Lastpage

1457

Abstract

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.

Keywords

III-V semiconductors; electroluminescence; gallium compounds; indium compounds; lattice constants; light emitting diodes; photonic band gap; photonic crystals; semiconductor quantum wells; InGaN-GaN; InGaN-GaN multiquantum-well light-emitting diodes; blue light-emitting diodes; constructive interference; current-voltage characteristics; electroluminescence intensities; lattice constant effect; light output; photonic bandgap; photonic crystals; triangular lattice constants; wavelength 230 nm to 690 nm; Electroluminescence; Gallium nitride; Lattices; Light emitting diodes; Light sources; Nanophotonics; Periodic structures; Photonic crystals; Slabs; Solid state circuits; Electroluminescence (EL); light-emitting diodes (LEDs); nanophotonics; periodic structures;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.927893

Filename

4585419