Nanophotonics (Apr 2024)

Emission engineering in microdisk lasers via direct integration of meta-micromirrors

  • Yu Aran,
  • Kim Moohyuk,
  • Song Da In,
  • Park Byoung Jun,
  • Jeong Hae Rin,
  • You Byeong Uk,
  • Jeon Seung-Woo,
  • Han Sang-Wook,
  • Kim Myung-Ki

DOI
https://doi.org/10.1515/nanoph-2023-0898
Journal volume & issue
Vol. 13, no. 16
pp. 2903 – 2913

Abstract

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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 increase in the average emission from ten microdisk lasers. This integration not only enhances the emission efficiency of small lasers but also holds considerable implications for micro- and nano-photonic integrations. The results of this integration open up new possibilities in various fields, including photonic integrated circuits, bio-sensing technologies, and the development of quantum light sources.

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