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Ganesan A, Seshia A. Resonance tracking in a micromechanical device using phononic frequency combs. Sci Rep 2019; 9:9452. [PMID: 31263233 PMCID: PMC6602941 DOI: 10.1038/s41598-019-46003-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/12/2019] [Indexed: 11/09/2022] Open
Abstract
Micro and nanomechanical resonators have been extensively researched in recent decades for applications to time and frequency references, as well as highly sensitive sensors. Conventionally, the operation of these resonant sensors is implemented using a feedback oscillator to dynamically track variations in the resonant frequency. However, this approach places limitations on the frequency stability of the output response, particularly owing to near-carrier noise shaping, limiting measurement stabilities at short-to-moderate integration times. Here, in this paper, utilizing the recent experimental demonstration of phononic frequency combs, we demonstrate an alternative resonance tracking approach with the potential to provide significant improvements in near-carrier phase noise and long-term stability. In addition, we also showcase comb dynamics mediated resonant frequency modulation which indirectly points to the possible control of inevitable noise processes including thermomechanical fluctuations. This resonant tracking approach may also have general applicability to a number of other physical oscillators.
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Affiliation(s)
- Adarsh Ganesan
- Nanoscience Centre, University of Cambridge, Cambridge, UK
| | - Ashwin Seshia
- Nanoscience Centre, University of Cambridge, Cambridge, UK.
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2
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Ronellenfitsch H, Dunkel J, Wilczek M. Optimal Noise-Canceling Networks. PHYSICAL REVIEW LETTERS 2018; 121:208301. [PMID: 30500224 DOI: 10.1103/physrevlett.121.208301] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 10/03/2018] [Indexed: 06/09/2023]
Abstract
Natural and artificial networks, from the cerebral cortex to large-scale power grids, face the challenge of converting noisy inputs into robust signals. The input fluctuations often exhibit complex yet statistically reproducible correlations that reflect underlying internal or environmental processes such as synaptic noise or atmospheric turbulence. This raises the practically and biophysically relevant question of whether and how noise filtering can be hard wired directly into a network's architecture. By considering generic phase oscillator arrays under cost constraints, we explore here analytically and numerically the design, efficiency, and topology of noise-canceling networks. Specifically, we find that when the input fluctuations become more correlated in space or time, optimal network architectures become sparser and more hierarchically organized, resembling the vasculature in plants or animals. More broadly, our results provide concrete guiding principles for designing more robust and efficient power grids and sensor networks.
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Affiliation(s)
- Henrik Ronellenfitsch
- Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
| | - Jörn Dunkel
- Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
| | - Michael Wilczek
- Max Planck Institute for Dynamics and Self-Organization, 37077 Göttingen, Germany
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Dong X, Dykman MI, Chan HB. Strong negative nonlinear friction from induced two-phonon processes in vibrational systems. Nat Commun 2018; 9:3241. [PMID: 30104694 PMCID: PMC6089905 DOI: 10.1038/s41467-018-05246-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 06/25/2018] [Indexed: 12/03/2022] Open
Abstract
Self-sustained vibrations in systems ranging from lasers to clocks to biological systems are often associated with the coefficient of linear friction, which relates the friction force to the velocity, becoming negative. The runaway of the vibration amplitude is prevented by positive nonlinear friction that increases rapidly with the amplitude. Here we use a modulated electromechanical resonator to show that nonlinear friction can be made negative and sufficiently strong to overcome positive linear friction at large vibration amplitudes. The experiment involves applying a drive that simultaneously excites two phonons of the studied mode and a phonon of a faster decaying high-frequency mode. We study generic features of the oscillator dynamics with negative nonlinear friction. Remarkably, self-sustained vibrations of the oscillator require activation in this case. When, in addition, a resonant force is applied, a branch of large-amplitude forced vibrations can emerge, isolated from the branch of the ordinary small-amplitude response. Negative linear friction is known to lead to self-sustained vibrations in many systems. Here, the authors show that when nonlinear negative friction in an electromechanical oscillator becomes larger than its positive linear counterpart such self-sustained vibrations require activation.
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Affiliation(s)
- X Dong
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - M I Dykman
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824, USA
| | - H B Chan
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. .,William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
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Seitner MJ, Abdi M, Ridolfo A, Hartmann MJ, Weig EM. Parametric Oscillation, Frequency Mixing, and Injection Locking of Strongly Coupled Nanomechanical Resonator Modes. PHYSICAL REVIEW LETTERS 2017; 118:254301. [PMID: 28696761 DOI: 10.1103/physrevlett.118.254301] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Indexed: 06/07/2023]
Abstract
We study locking phenomena of two strongly coupled, high quality factor nanomechanical resonator modes to a common parametric drive at a single drive frequency in different parametric driving regimes. By controlled dielectric gradient forces we tune the resonance frequencies of the flexural in-plane and out-of-plane oscillation of the high stress silicon nitride string through their mutual avoided crossing. For the case of the strong common parametric drive signal-idler generation via nondegenerate parametric two-mode oscillation is observed. Broadband frequency tuning of the very narrow linewidth signal and idler resonances is demonstrated. When the resonance frequencies of the signal and idler get closer to each other, partial injection locking, injection pulling, and complete injection locking to half of the drive frequency occurs depending on the pump strength. Furthermore, satellite resonances, symmetrically offset from the signal and idler by their beat note, are observed, which can be attributed to degenerate four-wave mixing in the highly nonlinear mechanical oscillations.
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Affiliation(s)
| | - Mehdi Abdi
- Department of Physics, Technische Universität München, 85748 Garching, Germany
- Institute for Theoretical Physics, Ulm University, 89081 Ulm, Germany
| | - Alessandro Ridolfo
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra (MIFT), Universita di Messina, 98166 Messina, Italy
| | - Michael J Hartmann
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, EH14 4AS Edinburgh, United Kingdom
| | - Eva M Weig
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
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5
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Venstra WJ, Capener MJ, Elliott SR. Nanomechanical gas sensing with nonlinear resonant cantilevers. NANOTECHNOLOGY 2014; 25:425501. [PMID: 25267180 DOI: 10.1088/0957-4484/25/42/425501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cantilevers play an important role as linear transducers in nanoscience, with nanomechanical detection of mass and stress as a clear example. We performed gas sensing experiments with a standard functionalized cantilever driven strongly into the regime of nonlinear oscillations. We compared the cantilever response to the selective adsorption of ethanol vapour in the nonlinear regime, to the ones obtained in the conventional linear static and dynamic sensing modes. In the nonlinearly driven cantilever, the adsorption and desorption-induced frequency shifts were enhanced by over a factor of three compared to resonant sensing with the same mode in the linear regime. This demonstrates a route towards gas detectors that exploit nonlinearity to enhance the responsivity, which can be implemented with standard cantilever devices.
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Affiliation(s)
- Warner J Venstra
- Kavli Institute of Nanoscience Delft, Delft University of Technology, Lorentzweg 1, 2628CJ Delft, The Netherlands
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6
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Stabilization of a linear nanomechanical oscillator to its thermodynamic limit. Nat Commun 2014; 4:2860. [PMID: 24326974 DOI: 10.1038/ncomms3860] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 11/04/2013] [Indexed: 12/11/2022] Open
Abstract
The rapid development of micro- and nanomechanical oscillators in the past decade has led to the emergence of novel devices and sensors that are opening new frontiers in both applied and fundamental science. The potential of these devices is however affected by their increased sensitivity to external perturbations. Here we report a non-perturbative optomechanical stabilization technique and apply the method to stabilize a linear nanomechanical beam at its thermodynamic limit at room temperature. The reported ability to stabilize a nanomechanical oscillator to the thermodynamic limit can be extended to a variety of systems and increases the sensitivity range of nanomechanical sensors in both fundamental and applied studies.
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Kenig E, Cross MC. Eliminating 1/f noise in oscillators. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:042901. [PMID: 24827307 DOI: 10.1103/physreve.89.042901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Indexed: 06/03/2023]
Abstract
We study 1/f and narrow-bandwidth noise in precision oscillators based on high-quality factor resonators and feedback. The dynamics of such an oscillator are well described by two variables, an amplitude and a phase. In this description we show that low-frequency feedback noise is represented by a single noise vector in phase space. The implication of this is that 1/f and narrow-bandwidth noise can be eliminated by tuning controllable parameters, such as the feedback phase. We present parameter values for which the noise is eliminated and provide specific examples of noise sources for further illustration.
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Affiliation(s)
- Eyal Kenig
- Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
| | - M C Cross
- Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
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Simpson TB, Liu JM, AlMulla M, Usechak NG, Kovanis V. Limit-cycle dynamics with reduced sensitivity to perturbations. PHYSICAL REVIEW LETTERS 2014; 112:023901. [PMID: 24484013 DOI: 10.1103/physrevlett.112.023901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Indexed: 06/03/2023]
Abstract
Limit-cycle oscillators are used to model a broad range of periodic nonlinear phenomena. Using the optically injected semiconductor laser as a paradigmatic example, we demonstrate that at specific operating points, the period-one oscillation frequency is simultaneously insensitive to multiple perturbation sources. In our system these include the temperature fluctuations experienced by the master and slave lasers as well as fluctuations in the bias current applied to the slave laser. Tuning of the oscillation frequency then depends only on the injected optical field amplitude. Experimental measurements are in detailed quantitative agreement with numerical modeling. These special operating points should prove valuable for developing ultrastable nonlinear oscillators, such as a narrow-linewidth, frequency-tunable photonic microwave oscillator.
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Affiliation(s)
- Thomas B Simpson
- L-3 Applied Technologies, Inc., 10770 Wateridge Circle, San Diego, California, USA
| | - Jia-Ming Liu
- Electrical Engineering Department, University of California, Los Angeles, Los Angeles, California, USA
| | - Mohammad AlMulla
- Electrical Engineering Department, University of California, Los Angeles, Los Angeles, California, USA
| | - Nicholas G Usechak
- Air Force Research Laboratory, 2241 Avionics Circle, Wright-Patterson AFB, Ohio, USA
| | - Vassilios Kovanis
- Air Force Research Laboratory, 2241 Avionics Circle, Wright-Patterson AFB, Ohio, USA
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Matheny MH, Grau M, Villanueva LG, Karabalin RB, Cross MC, Roukes ML. Phase synchronization of two anharmonic nanomechanical oscillators. PHYSICAL REVIEW LETTERS 2014; 112:014101. [PMID: 24483899 DOI: 10.1103/physrevlett.112.014101] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Indexed: 06/03/2023]
Abstract
We investigate the synchronization of oscillators based on anharmonic nanoelectromechanical resonators. Our experimental implementation allows unprecedented observation and control of parameters governing the dynamics of synchronization. We find close quantitative agreement between experimental data and theory describing reactively coupled Duffing resonators with fully saturated feedback gain. In the synchronized state we demonstrate a significant reduction in the phase noise of the oscillators, which is key for sensor and clock applications. Our work establishes that oscillator networks constructed from nanomechanical resonators form an ideal laboratory to study synchronization--given their high-quality factors, small footprint, and ease of cointegration with modern electronic signal processing technologies.
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Affiliation(s)
- Matthew H Matheny
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Matt Grau
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Luis G Villanueva
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Rassul B Karabalin
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
| | - M C Cross
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Michael L Roukes
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
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Kenig E, Cross MC, Moehlis J, Wiesenfeld K. Phase noise of oscillators with unsaturated amplifiers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:062922. [PMID: 24483546 DOI: 10.1103/physreve.88.062922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Indexed: 06/03/2023]
Abstract
We study the role of amplifier saturation in eliminating feedback noise in self-sustained oscillators. We extend previous works that use a saturated amplifier to quench fluctuations in the feedback magnitude, while simultaneously tuning the oscillator to an operating point at which the resonator nonlinearity cancels fluctuations in the feedback phase. We consider a generalized model which features an amplitude-dependent amplifier gain function. This allows us to determine the total oscillator phase noise in realistic configurations due to noise in both quadratures of the feedback, and to show that it is not necessary to drive the resonator to large oscillation amplitudes in order to eliminate noise in the phase of the feedback.
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Affiliation(s)
- Eyal Kenig
- Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
| | - M C Cross
- Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
| | - Jeff Moehlis
- Department of Mechanical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Kurt Wiesenfeld
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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11
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Eichler A, Moser J, Dykman M, Bachtold A. Symmetry breaking in a mechanical resonator made from a carbon nanotube. Nat Commun 2013; 4:2843. [DOI: 10.1038/ncomms3843] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 10/30/2013] [Indexed: 11/09/2022] Open
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12
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Allen JMA, Cross MC. Frequency precision of two-dimensional lattices of coupled oscillators with spiral patterns. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:052902. [PMID: 23767593 DOI: 10.1103/physreve.87.052902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Indexed: 06/02/2023]
Abstract
Two-dimensional lattices of N synchronized oscillators with reactive coupling are considered as high-precision frequency sources in the case where a spiral pattern is formed. The improvement of the frequency precision is shown to be independent of N for large N, unlike the case of purely dissipative coupling where the improvement is proportional to N, but instead depends on just those oscillators in the core of the spiral that acts as the source region of the waves. Our conclusions are based on numerical simulations of up to N=29929 oscillators and analytic results for a continuum approximation to the lattice in an infinite system. We derive an expression for the dependence of the frequency precision on the reactive component of the coupling constant, depending on a single parameter given by fitting the frequency of the spiral waves to the numerical simulations.
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Affiliation(s)
- John-Mark A Allen
- Corpus Christi College, University of Cambridge, Cambridge, CB2 1RH, United Kingdom
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Villanueva LG, Kenig E, Karabalin RB, Matheny MH, Lifshitz R, Cross MC, Roukes ML. Surpassing fundamental limits of oscillators using nonlinear resonators. PHYSICAL REVIEW LETTERS 2013; 110:177208. [PMID: 23679770 PMCID: PMC3839326 DOI: 10.1103/physrevlett.110.177208] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 12/11/2012] [Indexed: 05/22/2023]
Abstract
In its most basic form an oscillator consists of a resonator driven on resonance, through feedback, to create a periodic signal sustained by a static energy source. The generation of a stable frequency, the basic function of oscillators, is typically achieved by increasing the amplitude of motion of the resonator while remaining within its linear, harmonic regime. Contrary to this conventional paradigm, in this Letter we show that by operating the oscillator at special points in the resonator's anharmonic regime we can overcome fundamental limitations of oscillator performance due to thermodynamic noise as well as practical limitations due to noise from the sustaining circuit. We develop a comprehensive model that accounts for the major contributions to the phase noise of the nonlinear oscillator. Using a nanoelectromechanical system based oscillator, we experimentally verify the existence of a special region in the operational parameter space that enables suppressing the most significant contributions to the oscillator's phase noise, as predicted by our model.
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Affiliation(s)
- L. G. Villanueva
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
| | - E. Kenig
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
| | - R. B. Karabalin
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
| | - M. H. Matheny
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
| | - Ron Lifshitz
- Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
| | - M. C. Cross
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
| | - M. L. Roukes
- Kavli Nanoscience Institute, California Institute of Technology, Pasadena, California 91125, USA
- Corresponding author.
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Kenig E, Cross MC, Villanueva LG, Karabalin RB, Matheny MH, Lifshitz R, Roukes ML. Optimal operating points of oscillators using nonlinear resonators. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 86:056207. [PMID: 23214857 PMCID: PMC3839322 DOI: 10.1103/physreve.86.056207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Indexed: 05/05/2023]
Abstract
We demonstrate an analytical method for calculating the phase sensitivity of a class of oscillators whose phase does not affect the time evolution of the other dynamic variables. We show that such oscillators possess the possibility for complete phase noise elimination. We apply the method to a feedback oscillator which employs a high Q weakly nonlinear resonator and provide explicit parameter values for which the feedback phase noise is completely eliminated and others for which there is no amplitude-phase noise conversion. We then establish an operational mode of the oscillator which optimizes its performance by diminishing the feedback noise in both quadratures, thermal noise, and quality factor fluctuations. We also study the spectrum of the oscillator and provide specific results for the case of 1/f noise sources.
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Affiliation(s)
- Eyal Kenig
- Kavli Nanoscience Institute and Condensed Matter Physics, California Institute of Technology, MC 149-33, Pasadena, California 91125, USA.
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