Fig. 1. (a) Schematic diagram of SSC laser. The inset is the scanning electron microscope (SEM) image of the fabricated SSC structure. (b) Sketch of a rectangular F–P cavity of length L and width W. The wave vector can be separated into longitudinal and lateral components k_lo and k_la, respectively.

Fig. 2. The typical lateral oscillation mode distribution in the F–P cavity and the SSC cavity. The width is 40 µm, and the length is 50 µm; both the width and length of the triangle are 2 µm.

Fig. 3. Calculated Q-factors of the lateral propagating modes in the SSC cavity (black dots) and the F–P cavity (red dots).

Fig. 4. (a) L-I-V characteristic curves of the four types of lasers measured at room temperature under the CW operation; (b) three microstructures with different sizes.

Fig. 5. The ASE spectrum of the SSC lasers and the standard BA lasers at (a) 1.5 A and (b) 2.3 A, respectively.

Fig. 6. Measured L-I-V curves and WPE as functions of the operating current of SSC lasers (solid line) and standard BA lasers (dotted Line) in CW mode at 0°C.