Publications by Albert Schliesser

Cavity Quantum Optomechanics: Coupling Light And Micromechanical Oscillators

Tobias Kippenberg, Stefan Alexander Weis, Albert Schliesser

Cavity optomechanics(1) is a new research field that has seen spectacular advances in recent years. Optomechanics combines advances in nano-and electromechanical systems with radiation pressure enabled control. The radiation pressure backaction enables to ...

Ieee2014

Optical detection of radio waves through a nanomechanical transducer

Luis Guillermo Villanueva Torrijo, Albert Schliesser

Nature Publishing Group2014

Determination of effective mechanical properties of a double-layer beam by means of a nano-electromechanical transducer

Tobias Kippenberg, Xiaoqing Zhou, Albert Schliesser

We investigate the mechanical properties of a doubly clamped, double-layer nanobeam embedded into an electromechanical system. The nanobeam consists of a highly pre-stressed silicon nitride and a superconducting niobium layer. By measuring the mechanical d ...

Amer Inst Physics2014

Mid-infrared optical frequency combs at 2.5 mu m based on crystalline microresonators

Tobias Kippenberg, Tobias Herr, Albert Schliesser

The mid-infrared spectral range (lambda similar to 2-20 mu m) is of particular importance as many molecules exhibit strong vibrational fingerprints in this region. Optical frequency combs-broadband optical sources consisting of equally spaced and mutually ...

Nature Publishing Group2013

Evanescent straight tapered-fiber coupling of ultra-high Q optomechanical micro-resonators in a low-vibration helium-4 exchange-gas cryostat

Tobias Kippenberg, Albert Schliesser

We developed an apparatus to couple a 50-mu m diameter whispering-gallery silica microtoroidal resonator in a helium-4 cryostat using a straight optical tapered-fiber at 1550 nm wavelength. On a top-loading probe specifically adapted for increased mechanic ...

Amer Inst Physics2013

Phase noise measurement of external cavity diode lasers and implications for optomechanical sideband cooling of GHz mechanical modes

Tobias Kippenberg, Albert Schliesser

Cavity-optomechanical cooling via radiation pressure dynamical backaction enables ground-state cooling of mechanical oscillators, provided the laser exhibits sufficiently low phase noise. In this paper, we investigate and measure the excess phase noise of ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2013

Quantum-Coherent Coupling of a Mechanical Oscillator to an Optical Cavity Mode

Tobias Kippenberg, Stefan Alexander Weis, Albert Schliesser

We demonstrate an optomechanical microresonator in which optical and mechanical degrees of freedom exchange energy at a rate exceeding the relevant decoherence rates in the system, enabling quantum control of a mechanical oscillator with light. ...

Ieee2012

Dynamical photothermal response of optical whispering-gallery silica microresonators in helium-4 cryogenic environments

Tobias Kippenberg, Xiaoqing Zhou, Albert Schliesser

We present optical measurements of the photothermal response of a whispering-gallery silica microresonator in a helium-4 exchange gas cryostat. Using transient-mode numerical simulations, we discuss the various heat propagation mechanisms. (C) 2011 Optical ...

Ieee2012

Electromechanically induced absorption in a circuit nano-electromechanical system

Tobias Kippenberg, Xiaoqing Zhou, Albert Schliesser

A detailed analysis of electromechanically induced absorption (EMIA) in a circuit nano-electromechanical hybrid system consisting of a superconducting microwave resonator coupled to a nanomechanical beam is presented. By performing two-tone spectroscopy ex ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2012

Dual-mode temperature compensation technique for laser stabilization to a crystalline whispering gallery mode resonator

Tobias Kippenberg, Albert Schliesser

Frequency stabilization of a diode laser locked to a whispering gallery mode (WGM) reference resonator made of a MgF2 single crystal is demonstrated. The strong thermal dependence of the difference frequency between two orthogonally polarized TE an TM mode ...

Optical Society of America2012

Quantum-coherent coupling of a mechanical oscillator to an optical cavity mode

Tobias Kippenberg, Stefan Alexander Weis, Albert Schliesser

Optical laser fields have been widely used to achieve quantum control over the motional and internal degrees of freedom of atoms and ions(1,2), molecules and atomic gases. A route to controlling the quantum states of macroscopic mechanical oscillators in a ...

2012

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

Thermal-noise-limited crystalline whispering-gallery-mode resonator for laser stabilization

Tobias Kippenberg, Albert Schliesser

We have stabilized an external cavity diode laser to a whispering gallery mode resonator formed by a protrusion of a single-crystal magnesium fluoride cylinder. The cylinder's compact dimensions (less than or similar to 1 cm(3)) reduce the sensitivity to v ...

2011

Determination of the vacuum optomechanical coupling rate using frequency noise calibration

Tobias Kippenberg, Albert Schliesser

The strength of optomechanical interactions in a cavity optomechanical system can be quantified by a vacuum coupling rate g(0) analogous to cavity quantum electrodynamics. This single figure of merit removes the ambiguity in the frequently quoted coupling ...

2010

Cavity optomechanics with ultrahigh-Q crystalline microresonators

Tobias Kippenberg, Albert Schliesser

We present the observation of optomechanical coupling in crystalline whispering-gallery-mode (WGM) resonators. The high purity of the material enables optical quality factors in excess of 10(10) and finesse exceeding 10(6), as well as mechanical quality fa ...

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

Cavity Optomechanics with Whispering-Gallery Mode Optical Micro-Resonators

Tobias Kippenberg, Albert Schliesser

Parametric coupling of optical and mechanical degrees of freedom forms the basis of many ultra-sensitive measurements of both force and mechanical displacement. An optical cavity with a mechanically compliant boundary enhances the optomechanical interactio ...

2010

Near-field cavity optomechanics with nanomechanical oscillators

Tobias Kippenberg, Albert Schliesser

Cavity-enhanced radiation-pressure coupling between optical and mechanical degrees of freedom allows quantum-limited position measurements and gives rise to dynamical backaction, enabling amplification and cooling of mechanical motion. Here, we demonstrate ...

2009

Cryogenic properties of optomechanical silica microcavities

Tobias Kippenberg, Albert Schliesser

We report the study of the optical and mechanical properties of high-Q fused silica microtoroidal resonators at cryogenic temperatures (down to 1.6 K). A thermally induced optical multistability is observed and theoretically described, originating from the ...

2009

Resolved-sideband cooling and position measurement of a micromechanical oscillator close to the Heisenberg uncertainty limit

Tobias Kippenberg, Albert Schliesser

The theory of quantum measurement of mechanical motion, describing the mutual coupling of a meter and a measured object, predicts a variety of phenomena such as quantum backaction, quantum correlations and non-classical states of motion. In spite of great ...

2009