A mid-infrared Brillouin laser using ultra-high-Q on-chip resonators.

ABSTRACT: Ultra-high-Q optical resonators have facilitated advancements in on-chip photonics by harnessing nonlinear functionalities. While these breakthroughs, primarily focused on the near-infrared region, have extended interest to longer wavelengths holding importance for molecule science, the absence of ultra-high-Q resonators in this region remains a significant challenge. Here, we have developed on-chip microresonators with a remarkable Q-factor of 38 million at 3.86 μm wavelength, surpassing previous records by over 30 times. Employing innovative fabrication techniques, including spontaneous formation of light-guiding geometries with internal multilayer structures during material deposition, major loss factors, such as airborne-chemical absorption, were investigated and addressed. This allowe

SUBMITTER: Ko K 

PROVIDER: S-EPMC11923126 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature