Figure 4: MQW nanowire lasing threshold.
From: Multi-quantum-well nanowire heterostructures for wavelength-controlled lasers
a, Schematic diagram of an optical mode along the nanowire axis. Cross-sectional top view of a MQW nanowire taken along the A-A’ position indicated in the end-on view at the right. The MQW shell and GaN core are indicated in yellow and grey, respectively. The red curve represents the optical mode and the dashed–dotted line indicates the middle of the nanowire longitudinal cavity. b, FDTD simulation of the dominant laser mode in 13MQW and 26MQW nanowire structures. White lines indicate the nanowire profile and the core/shell interface. The scale bar is 100 nm. c, Calculated light-in versus light-out curve for 13MQW (red) and 26MQW (blue) nanowire structures. d, Measured lasing thresholds as a function of wavelength for 13MQW (red) and 26MQW (blue) nanowires. Solid symbols correspond to experimental data and lines are guides for the eyes.
