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 In0.15 Ga0.85 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 |
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Pages (from-to) | 1153-1160 |
Number of pages | 8 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 37 |
Issue number | 9 |
DOIs | |
State | Published - 1 Sep 2001 |
Keywords
- Defect mode
- Microcavity
- Photonic bandgap
- Surface emitting