Bidirectional Frequency Tuning of Vanadium Dioxide (VO<sub>2</sub>) Microstring Resonator by Optothermal Excitation

Bukhari, Syed A.; Goswami, Ankur; McGee, Ryan; Abraham, Rosmi; Hume, Dale; Chung, Hyun‐Joong; Thundat, Thomas

doi:10.1109/mems46641.2020.9056248

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The experimental results were compared and validated by numerical simulations using COMSOL. Recently, it has been shown that the vibrational analysis of microsized strings by Laser Döppler Vibrometry is influenced by unidirectional frequency changes using different laser power settings, especially in systems coupled with phase-change materials [23].…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

Ricarte

Meireles

Inácio³

2021

Vibration

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Low-stiffness or compliant materials are inherently difficult to characterize in terms of dynamic mechanical properties. Their free-vibration behavior is not frequently analyzed, given that performing classic vibration testing in these type of materials may imply the tampering of the results by external sources, either by changes in the geometry of the sample, by gravity-induced buckling, or the instrumentation itself (e.g., the mass of accelerometers). This study proposes an approach to determine the frequency response of these types of materials, using a noncontact methodology based on acoustic excitation and displacement measurement by Laser Döppler Vibrometry. The detailed method may be optimized by changing the sample design into a half-cane configuration to increase sample stiffness. This approach significantly increases the sample eigenmodes, facilitating their excitation by the acoustic pressure source. Numerical analysis using the values of the dynamic Young’s modulus from the experimental approaches validates the overall procedure. It is shown that the combination of numerical analysis and the proposed experimental method is a possible route for the determination of the dynamic Young’s modulus of these types of materials by inverse engineering.

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Section: Introductionmentioning

confidence: 99%

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

Ricarte

Meireles

Inácio³

2021

Vibration

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The effect of oxygen flow rate on metal–insulator transition (MIT) characteristics of vanadium dioxide (VO2) thin films by pulsed laser deposition (PLD)

Bukhari

Kumar

et al. 2020

Applied Surface Science

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Bidirectional Frequency Tuning of Vanadium Dioxide (VO₂) Microstring Resonator by Optothermal Excitation

Cited by 2 publications

References 11 publications

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

The effect of oxygen flow rate on metal–insulator transition (MIT) characteristics of vanadium dioxide (VO2) thin films by pulsed laser deposition (PLD)

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Bidirectional Frequency Tuning of Vanadium Dioxide (VO2) Microstring Resonator by Optothermal Excitation

Cited by 2 publications

References 11 publications

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

Characterizing the Frequency Response of Compliant Materials by Laser Döppler Vibrometry Coupled Acoustic Excitation

The effect of oxygen flow rate on metal–insulator transition (MIT) characteristics of vanadium dioxide (VO2) thin films by pulsed laser deposition (PLD)

Contact Info

Product

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Bidirectional Frequency Tuning of Vanadium Dioxide (VO₂) Microstring Resonator by Optothermal Excitation