Enhanced spontaneous emission in a photonic-crystal light-emitting diode

We report direct evidence of enhanced spontaneous emission in a photonic-crystal (PhC) light-emitting diode. The device consists of p-i-n heterojunction embedded in a suspended membrane, comprising a layer of self-assembled quantum dots. Current is injected laterally from the periphery to the center of the PhC. A well-isolated emission peak at 1.3 mu m from the PhC cavity mode is observed, and the enhancement of the spontaneous emission rate is clearly evidenced by time-resolved electroluminescence measurements, showing that our diode switches off in a time shorter than the bulk radiative and nonradiative lifetimes. (C) 2008 American Institute of Physics.


Published in:
Applied Physics Letters, 93, 143102
Year:
2008
Publisher:
American Institute of Physics
ISSN:
0003-6951
Keywords:
Laboratories:




 Record created 2010-11-30, last modified 2018-03-17

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