Control of spontaneous emission in a microcavity is of great interest for considering future device performances of vertical microcavity surface-emitting lasers (SEED),1,2 Several reports have suggested unique features owing to remarkable enhancement/inhibition of spontaneous emission in the microcavity (e.g., a thresholdless lasing operation, a coherent and low noise spontaneous emission light.)3-5 These reports predicted that such features can be conspicuously observed if the spontaneous emission factor (C factor)6 could approach unity, while C ranges 10-5 ~ 10-6 in conventional LDs.

© 1991 Optical Society of America

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