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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Development of a 1550-nm InAs/GaAs Quantum Dot Saturable Absorber Mirror with a Short-Period Superlattice Capping Structure Towards Femtosecond Fiber Laser Applications

Fig. 2

Material characterization and schematic band diagram. PL spectra measured at 11-300 K from a sample 1, b sample 2, and c sample 3, respectively. d High-resolution ω/2θ scans showing the GaAs (008) substrate peak and CL diffraction pattern for samples 1, 2, and 3, respectively. Schematic band diagram for e sample 2 and f sample 3, respectively

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