Nonlinear collective dynamics and microwave comb generation in a diamond maser

Abstract:Optically pumped room temperature masers are a promising platform for driven dissipative spin photon physics beyond steady state emission. Here we observe a sequence of dynamical thresholds in a room temperature nitrogen vacancy diamond maser as the optical pump is increased above the conventional masing threshold. The first threshold yields narrow-line continuous wave emission, while a second threshold produces a periodic train of microwave pulses whose repetition rate generates a frequency comb spectrum. At higher pump power, a third threshold gives rise to pulses with an oscillatory, frequency chirped decay. Time-resolved measurements link the comb directly to self-pulsing dynamics and Fourier analysis of individual bursts reveals a broad distribution of frequencies consistent with collective spin-resonator dynamics in an inhomogeneously broadened ensemble. These results establish the diamond maser as a room temperature platform for nonlinear nonequilibrium light matter dynamics and microwave comb generation.

Optics (physics.optics); Quantum Physics (quant-ph)

arXiv:2608.18692 [physics.optics]

(or arXiv:2608.18692v1 [physics.optics] for this version)

https://doi.org/10.48550/arXiv.2608.18692 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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