Publications de Emanuel Gavartin

Stabilization of a linear nanomechanical oscillator to its thermodynamic limit

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 affect ...

Nature Publishing Group2013

Reply to 'Dissipative feedback does not improve the optimal resolution of incoherent force detection'

Tobias Kippenberg, Emanuel Gavartin

Nature Publishing Group2013

Optonanomechanical Systems for Measurement Applications

Emanuel Gavartin

EPFL2013

Universal formation dynamics and noise of Kerr-frequency combs in microresonators

Tobias Kippenberg, Emanuel Gavartin, Tobias Herr

Optical frequency combs allow for the precise measurement of optical frequencies and are used in a growing number of applications. The new class of Kerr-frequency comb sources, based on parametric frequency conversion in optical microresonators, can comple ...

Nature Publishing Group2012

A hybrid on-chip optomechanical transducer for ultrasensitive force measurements

Tobias Kippenberg, Emanuel Gavartin

Nanoscale mechanical oscillators(1) are used as ultrasensitive detectors of force(2), mass(3) and charge(4). Nanomechanical oscillators have also been coupled with optical and electronic resonators to explore the quantum properties of mechanical systems(5) ...

Nature Publishing Group2012

Universal Dynamics of Kerr-Frequency Comb Formation in Microresonators

Tobias Kippenberg, Emanuel Gavartin, Tobias Herr

We experimentally investigate the initial dynamics of Kerr-frequency comb formation in crystalline MgF2 and planar Si3N4 microresonator and present a universal, platform independent condition for low phase noise performance. ...

Ieee2012

A versatile scheme for read-out and actuation of nanomechanical motion using silica microspheres

Tobias Kippenberg, Emanuel Gavartin

We employ silica microspheres to detect and actuate nanomechanical motion. With Si3N4-nanostrings, we achieve significant passive cooling by radiation pressure. Feedback-cooling enables stable operation at optical powers beyond the parametric-instability t ...

Ieee2012

Phase Noise and Dispersion in integrated Silicon Nitride based Kerr-Comb generators

Tobias Kippenberg, Emanuel Gavartin, Tobias Herr

We report on measurements of phase noise dynamics of microwave beat notes observed in low repetition rate silicon nitride based Kerr-comb generators and relate them to results from dispersion simulations and measurements. (C) 2011 Optical Society of Americ ...

Ieee2012

A hybrid on-chip optonanomechanical transducer for ultra-sensitive force measurements

Tobias Kippenberg, Emanuel Gavartin

We realize an integrated hybrid optonanomechanical transducer for the detection of weak forces. We propose and demonstrate with our system that dissipative feedback dramatically decreases the averaging time necessary to detect an incoherent force. (C) 2011 ...

Ieee2012

Optomechanical sideband cooling of a micromechanical oscillator close to the quantum ground state

Tobias Kippenberg, Emanuel Gavartin, Stefan Alexander Weis, Albert Schliesser

Cooling a mesoscopic mechanical oscillator to its quantum ground state is elementary for the preparation and control of quantum states of mechanical objects. Here, we pre-cool a 70-MHz micromechanical silica oscillator to an occupancy below 200 quanta by t ...

2011

Optomechanical Coupling in a Two-Dimensional Photonic Crystal Defect Cavity

Tobias Kippenberg, Emanuel Gavartin

Periodically structured materials can sustain both optical and mechanical modes. Here we investigate and observe experimentally the optomechanical properties of a conventional two-dimensional suspended photonic crystal defect cavity with a mode volume of s ...

2011

Octave Spanning Tunable Frequency Comb from a Microresonator

Tobias Kippenberg, Emanuel Gavartin, Tobias Herr

We report the generation of an octave-spanning optical frequency comb in a continuous wave laser pumped microresonator. The generated comb spectrum covers the wavelength range from 990 to 2170 nm without relying on additional external broadening. Continuou ...

2011

Measuring nanomechanical motion with an imprecision below the standard quantum limit

Tobias Kippenberg, Emanuel Gavartin

We report a room-temperature measurement of nanomechanical motion with an imprecision below the standard quantum limit (SQL), using cavity-enhanced optical near fields. Fundamental thermodynamical cavity frequency fluctuation limits the total imprecision t ...

2010

Optomechanically Induced Transparency

Tobias Kippenberg, Emanuel Gavartin, Stefan Alexander Weis, Albert Schliesser

Electromagnetically induced transparency is a quantum interference effect observed in atoms and molecules, in which the optical response of an atomic medium is controlled by an electromagnetic field. We demonstrated a form of induced transparency enabled b ...

American Association for the Advancement of Science2010