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Página principal > Artículos > Artículos publicados > Injection locking in an optomechanical coherent phonon source |
Fecha: | 2021 |
Resumen: | Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in a deeply sideband-unresolved optomechanical system. The high-amplitude mechanical oscillations are driven by the anharmonic modulation of the radiation pressure force that result from an absorption-mediated free-carrier/temperature limit cycle, i. e. , self-pulsing. Synchronization is observed when the pump laser driving the mechanical oscillator to a self-sustained state is modulated by a radiofrequency tone. We employ a pump-probe phonon detection scheme based on an independent optical cavity to observe only the mechanical oscillator dynamics. The lock range of the oscillation frequency, i. e. , the Arnold tongue, is experimentally determined over a range of external reference strengths, evidencing the possibility to tune the oscillator frequency for a range up to 350 kHz. The stability of the coherent phonon source is evaluated via its phase noise, with a maximum achieved suppression of 44 dBc/Hz at 1 kHz offset for a 100 MHz mechanical resonator. Introducing a weak modulation in the excitation laser reveals as a further knob to trigger, control and stabilize the dynamical solutions of self-pulsing based optomechanical oscillators, thus enhancing their potential as acoustic wave sources in a single-layer silicon platform. |
Ayudas: | European Commission 713450 Agencia Estatal de Investigación SEV-2017-0706 Ministerio de Ciencia e Innovación PGC2018-094490-B-C22 Ministerio de Ciencia e Innovación PGC2018-101743-B-I00 Ministerio de Ciencia e Innovación RYC-2014-15392 |
Nota: | Altres ajuts: CERCA Programme/Generalitat de Catalunya. |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Materia: | Injection locking ; Nonlinear dynamics ; Optomechanics ; Self-sustained oscillator |
Publicado en: | Nanophotonics, Vol. 10, Issue 4 (2021) , p. 1319-1327, ISSN 2192-8614 |
9 p, 2.0 MB |