Figure 2 | Scientific Reports

Figure 2

From: Demonstration of polarization control GaN-based micro-cavity lasers using a rigid high-contrast grating reflector

Figure 2

(a) Schematic cross-section of the GaN-based HCG MC laser consisting of a bottom SiO2/Ta2O5 DBR, a GaN cavity, and an HCG reflector. The red dashed square and blue curved-arrow indicate the simulation domain for calculating the output emission intensity spectrum and the reciprocating longitudinal wave. (b) A plane-view SEM image of the fabricated TiO2 HCG MC with a diameter of 45 µm. Inset shows the magnified HCG morphology. (c) A cross-sectional SEM image of the TiO2 HCG.

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