Small-signal analysis of 1.3-μm microcavity light-emittingdiodes |
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| Authors: | Landais P Roycroft B Shaw A Depreter B Moerman I Hegarty J |
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| Affiliation: | Dept. of Phys., Trinity Coll., Dublin; |
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| Abstract: | The modulation speed of 1.3-μm microcavity light-emitting diodes (MCLEDs) has been measured using a small-signal modulation analysis. A speed of 260 MHz using a 25-μm diameter sample at current density of 10 kA/cm2 has been achieved. The carrier confinement has been calculated for several carrier densities in order to investigate the origin of the speed limitation. By comparing the performance of the 1.3-μm MCLEDs with that of the 990-nm devices we conclude that the limiting factor on the speed seems to be a lack of carrier confinement in the quantum wells and not a cavity effect |
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