Figure 4 | Scientific Reports

Figure 4

From: Deep-UV nitride-on-silicon microdisk lasers

Figure 4

Microdisk laser emission versus disk diameter.

Photoluminescence spectra taken above threshold for a wide range of microdisk diameters. Spectra are shifted for clarity. The top spectrum corresponds to a nitride microdisk directly lying on oxide following growth on a SOI substrate and underetching and the other ones to nitride microdisks standing on a Si post. The spectrometer resolution is 1 meV. Inset: Average spectra (dots) of 20 investigated microdisks standing on a Si post (all diameters), recorded above lasing threshold at P/Pthr = 1.3. The red line is a guide for the eye.

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