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Infrared modulated interlevel spectroscopy of self-assembled quantum dot lasers using a free electron laser
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View: Figures


Image of FIG. 1.
FIG. 1.

The temperature dependence of for the long cavity device. The inset shows a typical LI characteristic (solid line) and the effect of a small temperature increase on the LI characteristic for absolute temperatures and (dashed lines).

Image of FIG. 2.
FIG. 2.

Transients of the lasing output following illumination by a far-IR macropulse. The profile of the macropulse is shown as recorded by a pyrometer.

Image of FIG. 3.
FIG. 3.

Modulation of the near-IR lasing as a function of the far-IR photon energy. The inset shows a higher resolution scan for a temperature of . The sharp feature at , superimposed on the broad dip, is attributed to atmospheric absorption.

Image of FIG. 4.
FIG. 4.

Room temperature spontaneous emission spectrum recorded for high current injection, showing emission from both the ground and first excited state transitions. The narrower spectrum shows emission from a laser device, with lasing occurring at .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Infrared modulated interlevel spectroscopy of 1.3μm self-assembled quantum dot lasers using a free electron laser