Detection of Digitally Phase-Modulated Signals Utilizing Mechanical Vibration of CNT Cantilever

Tadokoro, Yukihiro; Ohno, Yutaka; Tanaka, Hiroya

doi:10.1109/tnano.2017.2765310

Cited by 14 publications

(47 citation statements)

References 28 publications

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“…In particular, CNT-based nanowire resonators have attracted considerable interest as nanoscale mechanical devices due to their extraordinary sensitivities with high-quality factors to a small perturbation from surroundings. Suspended CNT-based nanowire resonators are promising candidates for apparatuses measuring a wide range of physical quantities, such as EM waves [2], small forces [7], masses [8], temperatures [9], and noises [10].…”

Section: Introductionmentioning

confidence: 99%

Properties of the Geometric Phase in Electromechanical Oscillations of Carbon-Nanotube-Based Nanowire Resonators

Choi

2019

Nanoscale Res Lett

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The geometric phase is an extra phase evolution in the wave function of vibrations that is potentially applicable in a broad range of science and technology. The characteristics of the geometric phase in the squeezed state for a carbon-nanotube-based nanowire resonator have been investigated by means of the invariant operator method. The introduction of a linear invariant operator, which is useful for treating a complicated time-dependent Hamiltonian system, enabled us to derive the analytical formula of the geometric phase. By making use of this, we have analyzed the time behavior of the geometric phase based on relevant illustrations. The influence of squeezing parameters on the evolution of the geometric phase has been investigated. The geometric phase, in large, oscillates, and the envelope of such oscillation increases over time. The rate of the increase of the geometric phase is large when the parameters, such as the classical amplitude of the oscillation, the damping factor, and the amplitude of the driving force, are large. We have confirmed a very sharp increase of the geometric phase over time in the case that the angular frequency of the system reaches near the resonance angular frequency. Our development regarding the characteristics of the geometric phase is crucial for understanding the topological features in nanowire oscillations.

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Section: Introductionmentioning

confidence: 99%

Properties of the Geometric Phase in Electromechanical Oscillations of Carbon-Nanotube-Based Nanowire Resonators

Choi

2019

Nanoscale Res Lett

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“…In contrast to the linear signal processing with nanomechanical systems 28 , the proposed approach works provided the signal amplitude F S is above some threshold value (we note that a threshold is also involved in post-processing of a linearly detected signal at the stage of digitization). The threshold is determined by the distance between the bifurcational values F B1 and F B2 , as the overall drive amplitude has to cross one or the other of them depending on the phase of the signal.…”

Section: Introductionmentioning

confidence: 99%

Driven nonlinear nanomechanical resonators as digital signal detectors

Tadokoro

Tanaka

Dykman

2018

Sci Rep

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Because of their nonlinearity, vibrational modes of resonantly driven nanomechanical systems have coexisting stable states of forced vibrations in a certain range of the amplitude of the driving force. Depending on its phase, which encodes binary information, a signal at the same frequency increases or decreases the force amplitude. The resulting force amplitude can be outside the range of bistability. The values of the mode amplitude differ significantly on the opposite sides of the bistability region. Therefore the mode amplitude is very sensitive to the signal phase. This suggests using a driven mode as a bi-directional bifurcation amplifier, which switches in the opposite directions depending on the signal phase and provides an essentially digital output. We study the operation of the amplifier near the critical point where the width of the bistability region goes to zero and thus the threshold of the signal amplitude is low. We also develop an analytical technique and study the error rate near the threshold. The results apply to a broad range of currently studied systems and extend to micromechanical systems and nonlinear electromagnetic cavities.

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“…Introduction: Recent progress in MEMS and nanoelectromechanical systems (NEMS) technology has paved the way for interesting applications [1,2]. Towards the connection of these devices and the delivery of the data they record, Atakan et al have proposed nanoscale communication systems, and some interesting implementations of MEMS/ NEMS devices based on the mechanical vibration of nanostructures have been proposed [4,5]. To transfer digital data, digital modulation/ demodulation techniques are often used.…”

mentioning

confidence: 99%

“…To transfer digital data, digital modulation/ demodulation techniques are often used. To secure reliable communication at the nanoscale, coherent detection is crucial [3,5], and low transmission error rates have been successfully demonstrated using MEMS/NEMS technology. However, these devices have a critical drawback: the synchronisation of the phase of the transmitted and received carrier signals is necessary.…”

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confidence: 99%

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Non‐coherent detection of digitally phase‐modulated signals with carbon nanotube cantilever vibration

2018

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Towards the realisation of reliable communication systems using simple nanoscale transceivers, this Letter presents a method for the non-coherent detection of digitally phase-modulated signals. Without the synchronisation of the phases of the transmitted and received carrier signals, data transmission cannot be reliably achieved. To address this issue, the proposed method is developed using a nanoscale receiver that receives the binary phase-modulated signal through the mechanical vibration of a carbon nanotube cantilever. The present analysis reveals that this receiver has an interesting characteristic: the two decision statistics available in the receiver have a phase difference of p/2, which means that at least one of the statistics is fairly reliable regardless of the synchronisation error. Through the selection of the more reliable of the two statistics, the proposed method achieves low error in the estimation of the transmitted data even without carrier phase synchronisation. This Letter presents the derivation of the proposed rule for selecting the statistic and numerical results that demonstrate the effectiveness of the proposed method. This Letter is expected to contribute to the realisation of future communication applications using nanoscale transceivers.

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Detection of Digitally Phase-Modulated Signals Utilizing Mechanical Vibration of CNT Cantilever

Cited by 14 publications

References 28 publications

Properties of the Geometric Phase in Electromechanical Oscillations of Carbon-Nanotube-Based Nanowire Resonators

Properties of the Geometric Phase in Electromechanical Oscillations of Carbon-Nanotube-Based Nanowire Resonators

Driven nonlinear nanomechanical resonators as digital signal detectors

Non‐coherent detection of digitally phase‐modulated signals with carbon nanotube cantilever vibration

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