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Lead salt microdisk lasers operating in continuous wave mode at wavelength
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View: Figures


Image of FIG. 1.
FIG. 1.

cw PL spectra of a PbSe/PbSrSe MQW (full line), bulk PbSe (dotted line), and a PbSe/PbEuSe MQW (dashed line) at 300 K. The vertical dashed line indicates the strong absorption of atmospheric in the spectra.

Image of FIG. 2.
FIG. 2.

SEM micrographs of a microdisk laser with a PbSe/PbSrSe MQW active zone and spacer layers. The disk diameter is and the overall thickness is . (b) shows the disk edge on an enlarged scale, revealing the laser active zone as dark stripe and showing the roughness resulting from the etch process.

Image of FIG. 3.
FIG. 3.

Low resolution (20 nm) cw emission spectra of the microdisk laser at 115 K at pump powers from 1.1–2.2 mW. Inset: corresponding high resolution (1 nm) measurement. The resolution is indicated by .

Image of FIG. 4.
FIG. 4.

Normalized high resolution (1 nm) spectra of the microdisk laser modes at certain temperatures at a pump power of 2.2 mW (dots). The lines are Gaussian fits to the data. The arrows mark the calculated resonator mode wavelengths with their mode numbers .

Image of FIG. 5.
FIG. 5.

Threshold curves (emission intensity vs pump intensity) for the laser modes of Fig. 4. The laser thresholds are indicated by the arrows. The lines represent linear fits to the experimental data (dots).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Lead salt microdisk lasers operating in continuous wave mode at 5.3 μm wavelength