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Optical wireless information transfer with nonlinear micromechanical resonators

Microsystems & Nanoengineering 2017年第1期3卷 163-168页

作者： joseph A.boales Farrukh Mateen Pritiraj Mohanty Department of Physics Boston University590 Commonwealth AvenueBostonMA 02215USA Department of Mechanical and Aerospace Engineering Boston University110 Cummington StreetBostonMA 02215USA

Wireless transfer of information is the basis of modern *** includes cellular,WiFi,Bluetooth,and GPS systems,all of which use electromagnetic radio waves with frequencies ranging from typically 100 MHz to a few ***,several long-standing challenges with standard radio-wave wireless transmission still exist,including keeping secure transmission of data from potential ***,we demonstrate wireless information transfer using a line-of-sight optical architecture with a micromechanical *** this fundamentally new approach,a laser beam encoded with information impinges on a nonlinear micromechanical resonator located a distance from the *** force generated by the radiation pressure of the laser light on the nonlinear micromechanical resonator produces a sideband modulation signal,which carries the precise information encoded in the subtle changes in the radiation *** this,we demonstrate data and image transfer with one hundred percent fidelity with a single 96-by-270μm silicon resonator element in an optical frequency *** mechanical approach relies only on the momentum of the incident photons and is therefore able to use any portion of the optical frequency band—a band that is 10000 times wider than the radio frequency *** line-of-sight architecture using highly scalable micromechanical resonators offers new possibilities in wireless *** to their small size,these resonators can be easily arrayed while maintaining a small form factor to provide redundancy and parallelism.

关键词： MEMS piezoelectricity radiation pressure wireless communication

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Micromechanical resonator with dielectric nonlinearity

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Microsystems & Nanoengineering 2018年第1期4卷 263-269页

作者： Farrukh Mateen joseph boales Shyamsunder Erramilli Pritiraj Mohanty Department of Mechanical and Aerospace Engineering Boston University110 Cummington StreetBostonMA 02215USA Department of Physics Boston University590 Commonwealth AvenueBostonMA 02215USA

Nonlinear response of dielectric polarization to electric field in certain media is the foundation of nonlinear ***,such nonlinearities are observed at high light intensities,achievable by laser,where atomic-scale field strengths exceeding 10^(6)–10^(8) V/m can be *** optics includes a host of fascinating phenomena such as higher harmonic frequency generation,sum and difference frequency generation,four-wave mixing,self-focusing,optical phase conjugation,and optical *** though nonlinear optics has been studied for more than five decades,such studies in analogous acoustic or microwave frequency ranges are yet to be ***,we demonstrate a nonlinear dielectric resonator composed of a silicon micromechanical resonator with an aluminum nitride piezoelectric layer,a material known to have a nonlinear optical *** a novel multiport approach,we demonstrate second and third-harmonic generation,sum and difference frequency generation,and four-wave *** demonstration of a nonlinear dielectric resonator opens up unprecedented possibilities for exploring nonlinear dielectric effects in engineered structures with an equally broad range of effects such as those observed in nonlinear ***,integration of a nonlinear dielectric layer on a chip-scale silicon micromechanical resonator offers tantalizing prospects for novel applications,such as ultra high harmonic generation,frequency multipliers,microwave frequency-comb generators,and nonlinear microwave signal processing.

关键词： dielectric optics nonlinear

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