Fig. 4: On-chip single-mode nanowire laser with an asymmetric output. | Light: Science & Applications

Fig. 4: On-chip single-mode nanowire laser with an asymmetric output.

From: On-chip single-mode CdS nanowire laser

Fig. 4

a Numerical simulation of the coupling efficiency of an asymmetric MZI structure with different coupling lengths. b SEM image of an as-fabricated asymmetric MZI structure. c Lasing spectrum of the asymmetric-MZI-based on-chip nanowire laser. Inset: pump-intensity-dependent output intensity of the laser. d, e Optical microscope images of the laser under excitation with (upper) and without (bottom) the illumination light.

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