Mode-locked optomechanical frequency combs in a graphene-silica microresonator.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41124241.
- Also identified by DOI 10.1126/sciadv.ady1279 and PMC identifier 12542935.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Mode locking is an essential process through which resonant modes achieve stable synchronization via nonlinear interactions. This self-organization allows photonic and electronic sources to produce pulsed waveforms and is vital for applications in ultrafast and high-field optics as well as frequency comb generation. Here, we report a mechanism to include photon-electron-phonon interactions, demonstrating the excitation of mode-locked optomechanical microcombs in a graphene-deposited silica microresonator, determined by the synergy of optomechanical back action and graphene saturable absorption. The circulating optical field induces mechanical oscillations that modulate the light wave, while Pauli blocking in graphene locks a single optomechanical mode, forming a localized coherent optical wave packet within a single microcavity. In addition, using frequency division techniques, the mode-locked optomechanical microcomb achieves repetition stability with phase noise reduced to -110.5 decibels relative to the carrier per hertz at a 1-hertz offset and an Allan deviation as low as 3 × 10<sup>-12</sup> @ 20 seconds, comparable to a standard rubidium clock.