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We demonstrate the first photo-assisted wet-etched flat-surface mirrors in III-V laser heterostructure having an average reflectance of 0.87 of the ideal cleaved facet reflectance Rc independent of crystal orientation. The largest observed reflectance was 0.93Rc. These lasers were fabricated using a 532-nm laser source, sulfuric acid, and exposed-metal mask. The lateral waveguiding formed from air-semiconductor...
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