Personne
Sergey Fedorov
Cette personne n’est plus à l’EPFL
Publications associées (16)
Hierarchical tensile structures with ultralow mechanical dissipation
Tobias Kippenberg, Alberto Beccari, Amirali Arabmoheghi, Nils Johan Engelsen, Sergey Fedorov
Structural hierarchy is found in myriad biological systems and has improved man-made structures ranging from the Eiffel tower to optical cavities. In mechanical resonators whose rigidity is provided by static tension, structural hierarchy can reduce the di ...
NATURE PORTFOLIO2022Perimeter Modes of Nanomechanical Resonators Exhibit Quality Factors Exceeding 10(9) at Room Temperature
Tobias Kippenberg, Guanhao Huang, Alberto Beccari, Amirali Arabmoheghi, Nils Johan Engelsen, Sergey Fedorov
Systems with low mechanical dissipation are extensively used in precision measurements such as gravitational wave detection, atomic force microscopy, and quantum control of mechanical oscillators via optomechanics and electromechanics. The mechanical quali ...
AMER PHYSICAL SOC2022Strained crystalline nanomechanical resonators with quality factors above 10 billion
Tobias Kippenberg, Alberto Beccari, Nils Johan Engelsen, Sergey Fedorov
In strained mechanical resonators, the concurrence of tensile stress and geometric nonlinearity dramatically reduces dissipation. This phenomenon, called dissipation dilution, is employed in mirror suspensions of gravitational-wave interferometers and at t ...
NATURE PORTFOLIO2022Mechanical resonators with high dissipation dilution in precision and quantum measurements
Position measurements of mechanical oscillators underpin experiments spanning from applied nanoscale sensing to endeavors aiming to resolve open fundamental problems of modern physics. Sufficiently precise position measurements are also used for engineerin ...
EPFL2020Fractal-like Mechanical Resonators with a Soft-Clamped Fundamental Mode
Tobias Kippenberg, Alberto Beccari, Nils Johan Engelsen, Sergey Fedorov
Self-similar structures occur naturally and have been employed to engineer exotic physical properties. We show that acoustic modes of a fractal-like system of tensioned strings can display increased mechanical quality factors due to the enhancement of diss ...
AMER PHYSICAL SOC2020Quantum-Limited Measurements Using an Optical Cavity with Modulated Intrinsic Loss
Alexander Tagantsev, Sergey Fedorov
We analyze a cavity optomechanical setup, in which the position of an oscillator modulates the internal optical loss. We show that, in contrast to systems with a fixed internal loss, in such a setup, quantum-limited position measurements can be performed a ...
AMER PHYSICAL SOC2019Clamp-Tapering Increases the Quality Factor of Stressed Nanobeams
Tobias Kippenberg, Alberto Beccari, Dalziel Joseph Wilson, Nils Johan Engelsen, Sergey Fedorov, Ryan Daniel Schilling, Amir Hossein Ghadimi
Stressed nanomechanical resonators are known to have exceptionally high quality factors (Q) due to the dilution of intrinsic dissipation by stress. Typically, the amount of dissipation dilution and thus the resonator Q is limited by the high mode curvature ...
AMER CHEMICAL SOC2019Ultralow Dissipation Mechanical Resonators for Quantum Optomechanics
Tobias Kippenberg, Alberto Beccari, Dalziel Joseph Wilson, Nils Johan Engelsen, Sergey Fedorov, Ryan Daniel Schilling, Amir Hossein Ghadimi
We demonstrate dissipation dilution engineering techniques for ultralow dissipation mechanical resonators. The Si3N4 nanobeams show quality factors (Q) as high as 800 million and Q x f exceeding 10(15) Hz-both records at room temperature. (C) 2019 The Auth ...
IEEE2019Generalized dissipation dilution in strained mechanical resonators
Tobias Kippenberg, Dalziel Joseph Wilson, Nils Johan Engelsen, Sergey Fedorov, Ryan Daniel Schilling, Amir Hossein Ghadimi
Mechanical resonators with high quality factors are widely used in precision experiments, ranging from gravitational wave detection and force sensing to quantum optomechanics. Beams and membranes are well known to exhibit flexural modes with enhanced quali ...
AMER PHYSICAL SOC2019ULTRASTABLE LASER SYSTEM FOR SPECTROSCOPY OF THE 1.14 mu m INNER-SHELL CLOCK TRANSITION IN Tm AND ITS ABSOLUTE FREQUENCY MEASUREMENT
We characterize a 1.14 mu m ultrastable semiconductor laser system for precision spectroscopy of Tm inner-shell clock transition using a frequency comb. We stabilize both the repetition and the carrier-envelope offset frequencies of a commercial Ti : sapph ...
SPRINGER2019