Dvir Munk – (Invited) Surface acoustic wave-photonic devices in standard silicon-on-insulator
Frequency comb and microwave generation with a full phononic bandgap1D optomechanical crystal cavity (Student Paper)
L. Mercad ́e1, L. L. Mart ́ın1,2, A. Griol1, D. Navarro-Urrios2, A. Mart ́ınez11Nanophotonics Technology Center, Universitat Polit
ecnica de Valencia,Camino de Vera s/n, 46022 Valencia, Spain2Departamento de F ́ısica, Facultad de Ciencias, Universidad de la Laguna3MIND-IN2UB, Departament d’Enginyeria Electr
onica i Biomedica, Facultat de F ́ısica,Universitat de Barcelona, Mart ́ı i Franqu`es 1, 08028 Barcelona, Spaine-mail: email@example.com
In this work we show that a silicon optomechanical crystal cavity can be used as an optoelectronic oscillatorwhen driven to the phonon lasing condition with a blue-detuned laser. The optomechanical cavity is designedto have a breathing like mode vibrating atΩm/2π=3.897 GHz in a full phononic bandgap. Our measurementsshow that the first harmonic displays a phase noise of -100 dBc/Hz at 100 kHz. Stronger blue-detuned drivingleads eventually to the formation of an optomechanical frequency comb, with lines spaced by the mechanicalfrequency. The measured phase noise grows up with the harmonic number, as in classical harmonic mixing.We present real-time measurements of the comb waveform and show that it can be adjusted to a theoreticalmodel recently presented. Our results suggest that silicon optomechanical cavities can play a role in integratedmicrowave photonics.
Dynamic Control of Plasmonic Beams
Dror Weisman1, Ady Arie11School of Electrical Engineering, Fleischman Faculty of Engineering and the Center for Light Matter Interaction, Tel-Aviv University, Tel-Aviv 6997801, Israele-mail: firstname.lastname@example.org
We experimentally demonstrate dynamic, electrically-controlled shaping of plasmonic beams, propagating at the boundary between a metal and a dielectric, by using the thermo-optic effect. The concept is based on selectively heating a specific region in which the plasmonic beam passes by injecting electrical current to an isolated metal layer. This leads to transverse modulation of thewavefront through the thermal dispersion of the dielectric layer above this metal region. We demonstrated two active plasmonic devices: a plasmonic mode converter between the fundamental and first order Hermite-Gauss modes and a tunable plasmonic lens with a dynamically varying focal length.
Session 5 Optomechanics and On Chip Plasmonics took place on June 23, 2020
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