biostudies-literatureUnknown13(16)Yu ADespite their excellent performance and versatility, the efficient integration of small lasers with other optical devices has long been hindered by their broad emission divergence. In this study, we introduce a novel approach for emission engineering in microdisk lasers, significantly enhancing their vertical emission output by directly integrating specially designed reflective metalenses, referred to as "meta-micromirrors". A 5 μm-diameter microdisk laser is precisely positioned at an 8 μm focal distance on a 30 × 30 μm² meta-micromirror featuring a numerical aperture (NA) of 0.95, accomplished through micro-transfer printing techniques. Our experiments demonstrated a notable increase in the emission efficiency within an NA of 0.65. Specifically, we observed a 2.68-fold increasNanophotonics (Berlin, Germany)2903-2913https://www.ebi.ac.uk/biostudies/studies/S-EPMC11501896biostudies-literatureEmission engineering in microdisk lasers via direct integration of meta-micromirrors.PMC11501896You BUYu AHan SWKim MKSong DIKim MPark BJJeong HRJeon SWfalseEmission engineering in microdisk lasers via direct integration of meta-micromirrors.Despite their excellent performance and versatility, the efficient integration of small lasers with other optical devices has long been hindered by their broad emission divergence. In this study, we introduce a novel approach for emission engineering in microdisk lasers, significantly enhancing their vertical emission output by directly integrating specially designed reflective metalenses, referred to as "meta-micromirrors". A 5 μm-diameter microdisk laser is precisely positioned at an 8 μm focal distance on a 30 × 30 μm² meta-micromirror featuring a numerical aperture (NA) of 0.95, accomplished through micro-transfer printing techniques. Our experiments demonstrated a notable increase in the emission efficiency within an NA of 0.65. Specifically, we observed a 2.68-fold increas2024-01-01T00:00:00Z2024 Jul2025-04-04T01:15:11.087Z2025-04-04T01:15:11.087ZS-EPMC115018963963431910.1515/nanoph-2023-0898