Abstract
A microcavity surface-emitting coherent electroluminescent device operating at room temperature under pulsed current injection is described. The microcavity is formed by a single defect in the center of a 2-D photonic crystal consisting of a GaAs-based heterostructure. The gain region consists of two 70- Å compressively strained In0.15Ga0.85 As quantum wells, which exhibit a spontaneous emission peak at 940 nm. The maximum measured output power from a single device is 14.4 μW. The near-field image of the output resembles the calculated TE mode distribution in a single defect microcavity. The measured far-field pattern indicates the predicted directionality of a microcavity light source. The light-current characteristics of the device exhibit a gradual turn-on, or a soft threshold, typical of single- or few-mode microcavity devices. Analysis of the characteristics with the carrier and photon rate equations yields a spontaneous emission factor β ≈ 0.06.
| Original language | English |
|---|---|
| Pages (from-to) | 1153-1160 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 37 |
| Issue number | 9 |
| Online published | Sept 2001 |
| DOIs | |
| Publication status | Published - Sept 2001 |
| Externally published | Yes |
Research Keywords
- Defect mode
- Microcavity
- Photonic bandgap
- Surface emitting
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