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29 Oct 2001

Volume 79, Issue 18, pp. 2865-3001

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Single-mode solid-state single photon source based on isolated quantum dots in pillar microcavities

E. Moreau, I. Robert, J. M. Gérard, I. Abram, L. Manin, and V. Thierry-Mieg

Appl. Phys. Lett. 79, 2865 (2001); http://dx.doi.org/10.1063/1.1415346 (3 pages) | Cited 253 times

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We report the fabrication of a single-mode solid-state single photon source, based on an isolated InAs quantum dot (QD) on resonance with the fundamental mode of a pillar microcavity. Photon correlation experiments under pulsed excitation reveal a clear antibunching behavior. We show that a preparation of the single photons in a given quantum state (same spatial mode, same polarization) can be obtained by placing a QD in resonance with the nondegenerate fundamental mode of an elliptical micropillar. © 2001 American Institute of Physics.
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78.66.Fd III-V semiconductors
78.55.Cr III-V semiconductors
78.67.Hc Quantum dots
42.50.Dv Quantum state engineering and measurements

High-power and long-lifetime InAs/GaAs quantum-dot laser at 1080 nm

Hui-Yun Liu, Bo Xu, Yong-Qiang Wei, Ding Ding, Jia-Jun Qian, Qin Han, Ji-Ben Liang, and Zhan-Guo Wang

Appl. Phys. Lett. 79, 2868 (2001); http://dx.doi.org/10.1063/1.1415416 (3 pages) | Cited 28 times

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High power and long lifetime have been demonstrated for a semiconductor quantum-dot (QD) laser with five-stacked InAs/GaAs QDs separated by an InGaAs strain-reducing layer (SRL) and a GaAs spacer layer as an active medium. The QD lasers exhibit a peak power of 3.6 W at 1080 nm, a quantum slope efficiency of 84.6%, and an output-power degradation rate of 5.6%/1000 h with continuous-wave constant-current operation at room temperature. A comparative reliability investigation indicates that the lifetime of the InAs/GaAs QD laser with the InGaAs SRL is much longer than that of a QD laser without the InGaAs SRL. This improved lifetime of the QD laser could be explained by the reduction of strain in and around InAs QDs induced by the InGaAs SRL. © 2001 American Institute of Physics.
Show PACS
42.55.Px Semiconductor lasers; laser diodes
42.60.By Design of specific laser systems
78.67.Hc Quantum dots
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