Elastic strain engineering for ultralow mechanical dissipation Pp Yield Strength

Grades of Steel | Yield Strength, Tensile Strength, Elongation | All Explain

Pp Yield Strength

Institute of Physics, Switzerland. Pp Yield Strength , 1015 Lausanne, Switzerland.

IBM Research–Zurich, 8803 Rüschlikon, Switzerland.

Institute of Physics, Institute of Physics Pp Yield Strength , 1015 Lausanne, Switzerland.

Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

IBM Research–Zurich, 8803 Rüschlikon, Switzerland.

Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

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Engineering stress or strain into materials can improve their performance. Adding mechanical stress to silicon chips, for instance, produces transistors with enhanced electron mobility. Ghadimi

explore the possibility of enhancing the vibrational properties of a micromechanical oscillator by engineering stress within the structure (see the Perspective by Eichler). By careful design of the micromechanical oscillator, and by building in associated stresses, exceptional vibrational properties can be produced. Such enhanced oscillators could be used as exquisite force sensors.

Extreme stresses can be produced in nanoscale structures; this feature has been used to realize enhanced materials properties, such as the high mobility of silicon in modern transistors. We show how nanoscale stress can be used to realize exceptionally low mechanical dissipation when combined with “soft-clamping”—a form of phononic engineering. Specifically, using a nonuniform phononic crystal pattern, we colocalize the strain and flexural motion of a free-standing silicon nitride nanobeam. Ringdown measurements at room temperature reveal string-like vibrational modes with quality (

hertz. These results illustrate a promising route for engineering ultracoherent nanomechanical devices.

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Elastic strain engineering for ultralow mechanical dissipation

Engineered stress is used to fabricate micromechanical oscillators with enhanced vibrational properties.

Elastic strain engineering for ultralow mechanical dissipation

Engineered stress is used to fabricate micromechanical oscillators with enhanced vibrational properties.