Figure 4.

PL spectra measured at 10 K of the as-grown and etched samples. (a) PL spectra in the wavelength range from 1.0 to 2.0 μm of the as-grown and etched SiGe/Si MQW samples with different etching times. (b) PL spectra in the wavelength range from 1.2 to 1.6 μm are amplified.

Chang et al. Nanoscale Research Letters 2013 8:349   doi:10.1186/1556-276X-8-349
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