Involved people : Giuseppe MODICA (PhD), Rui ZHU (PhD), Rémy BRAIVE
The sensitivity of detection is linked to the spectral purity, which is the figure of merit of the phase noise in oscillators describing the spectral width of the modulated signal. A first challenge in this field lies in the direct generation of high-frequency microwave signals in the GHz domain and above, with ultralow phase noise. A second challenge in this field lies indeed in the implementation of miniaturized, compact, transportable and integrated oscillators, especially for potential on-board applications and on-chip signal processing.
Challenges faced by oscillators are to work at high frequencies created by the two scaling laws of performance for oscillator performances, which is increasing frequency and decreasing size while keeping a high spectral purity
Figure 1: Integrated optomechanical resonators (2D photonic crystal) integrated on Silicon-On-Insulator waveguides
Figure 2: Envisoinned platform with optomechanical 2D photonic crystal inetrogated through SOI waveguide and acoustically driven.
Demonstration of optomechanical coupling in 2D photonic crystal in the GHz
Optomechanical gigahertz oscillator made of a two photon absorption free piezoelectric III/V semiconductor
I. Ghorbel, F. Swiadek, R.Zhu, D. Dolfi, G. Lehoucq, A. Martin, G. Moille, L. Morvan, R. Braive, S. Combrié, A. De Rossi
Integrated III-V Photonic Crystal – Si waveguide platform with tailored optomechanical coupling
V. Tsvirkun, A. Surrente, F. Raineri, G. Beaudoin, R. Raj, I. Sagnes, I. Robert-Philip and R. Braive
Scientific Reports 5, 16526 (2015)
Optomechanical Coupling in a Two-Dimensional Photonic Crystal Defect Cavity
E. Gavartin, R. Braive, I. Sagnes, O. Arcizet, A. Beveratos, T. J. Kippenberg, and I. Robert-Philip
Phys. Rev. Lett. 106, 203902 (2011)