Unidirectional Coherent Phonon Emission in an Optomechanic Nanobeam Containing Coupled Cavities

Nonreciprocal phonon emission is predicted theoretically from the coherent excitation of two coupled optomechanical cavities arranged along a phoxonic crystal nanobeam. The latter consists of a periodic array of holes and stubs and exhibits simultaneous photonic and phononic bandgaps. It is shown th...

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Bibliographic Details
Published in:Photonics 2022-09, Vol.9 (9), p.610
Main Authors: Korovin, Alexander V., Pennec, Yan, Djafari-Rouhani, Bahram
Format: Article
Language:English
Subjects:
Cavities
Coupled modes
coupled optomechanical cavities
Emission
Emissions
Energy gap
Engineering Sciences
Excitation
Optics
phonon emission
Phonons
Photonic
phoxonic crystal
Propagation
Simulation
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Summary:Nonreciprocal phonon emission is predicted theoretically from the coherent excitation of two coupled optomechanical cavities arranged along a phoxonic crystal nanobeam. The latter consists of a periodic array of holes and stubs and exhibits simultaneous photonic and phononic bandgaps. It is shown that nonreciprocal phonon emission arises from a combined effect of the spatial symmetry of the cavities and their underlying coupled phononic modes and the temporal phase shift between the excitation sources. This demonstration paves the way for the development of advanced integrated phonon networks and circuits, in which mechanical waves connect different elements in phononic and optomechanical structures.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9090610