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A light-controlled mechanical frequency comb

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Through optomechanical experiments in a semiconductor micro-resonator, researchers from the DON team of the MPQ laboratory, in collaboration with the Center for Nanoscience and Nanotechnology, have shown that a coupling between different forms of energy can give rise to a stable pulsed mechanical motion at ultra-high frequency. This discovery could enrich micro-mechanical technologies (accelerometers, force sensors, magnetometers, mass sensors), particularly in the ultra-high frequency range, where pulsed mechanical techniques are scarce.

These results, published in Phys. Rev. Lett, have been chosen as the journal cover, and covered by a news article on the INP website.


Figure:
Evolution of the mechanical frequency comb generated within an optomechanical micro-resonator. The resulting ultra-high frequency spectrum is shown as a function of the driving laser wavelength. Experiment (top); theory (bottom).

Contact:
Ivan Favero (ivan.favero@u-paris.fr)

Reference:

Electro-Opto-Mechanical Modulation Instability in a Semiconductor Resonator, P. E. Allain, B. Guha, C. Baker, D. Parrain, A. Lemaître, G. Leo, I. Favero
Phys. Rev. Lett. 126, 243901 (2021)