MATT EICHENFIELD THESIS

We call these photonic and phononic crystal bandgap cavities optomechanical crystals. Because the optical and mechanical modes occupy a volume more than , times smaller than the volume of a single human cell, the optomechanical interaction in this system is again at the fundamental limit set by optical diffraction. The mechanical modes of the beam probed with a background sensitivity only a factor of 4 above the standard quantum limit, and the application of less than a milliwatt of optical power is shown to increase the mechanical rigidity of the system by almost an order of magnitude. Work in the optical domain has revolved around millimeter- or micrometer-scale structures using the radiation pressure force. The miniscule effective volume of the mechanical mode corresponds to effective motional masses in the femtogram regime, which, coupled with the enormous optomechanical interaction and high optical and mechanical quality factors, allows transduction of microwave-frequency mechanical motion nearly at the standard quantum limit, with the standard quantum limit easily within reach with simple modifications of the experimental apparatus.

We discuss the future of optomechanical crystals and provide new methods of calculating all the otptomechanical properties of the structures. In this thesis, two different nanometer-scale structures that use combinations of gradient and radiation pressure optical forces are described theoretically and demonstrated experimentally. Citation Eichenfield, Matthew S. The dynamic back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing interest. We call these photonic and phononic crystal bandgap cavities optomechanical crystals. With the ability to readily interconvert photons and microwave-frequency phonons on the surface of a microchip, new chip-scale technologies can be created. No commercial reproduction, distribution, display or performance rights in this work are provided.

Browse by Author – CaltechTHESIS

Citation Eichenfield, Matthew S. These structures merge the fields of cavity optomechanics and nanomechanics into nano-optomechanical systsms NOMS. Abstract The dynamic back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing interest. Optics; photonics; photonic crystals; phononic crystals; acoustics; physics; optomechanics; cavity optomechanics. The miniscule effective volume of the mechanical mode corresponds to effective motional masses in the femtogram regime, which, coupled with the enormous optomechanical interaction and high optical and mechanical quality factors, allows transduction of microwave-frequency mechanical motion nearly at the standard quantum limit, with the standard quantum limit easily within reach with simple modifications of the experimental apparatus.

  SUJET DE DISSERTATION SUR LES NOUVELLES CONFLICTUALITÉS

matt eichenfield thesis

We call these photonic and phononic crystal bandgap cavities optomechanical crystals. The dynamic back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing eichenfild.

Cavity optomechanics in photonic and phononic crystals: This provides a powerful method for optically actuating microwave-frequency mechanical oscillators on a chip, and we demonstrate an on-chip phonon laser that emits over microwave-frequency phonons per second with a ratio of frequency to linewidth of 2 million—characteristics similar to those of the first optical lasers.

The second device focuses on just one of the doubly-clamped nanoscale beams of the Zipper.

A Caltech Library Service. By comparison, in microwave devices, low-loss superconducting structures have been used for gradient-force-mediated coupling to a nanomechanical oscillator of picogram mass.

The combination of the small motional mass and strong optomechanical coupling allows each trapped photon to drive motion of an acoustic mode with a force more than 15 times the weight of the structure. The mechanical modes of the beam probed with a background sensitivity only a factor of 4 above the standard quantum limit, and the application of less than a milliwatt of optical power is shown to increase the mechanical rigidity of the system by almost an order of magnitude.

  MO SCOIL ESSAY

matt eichenfield thesis

The optical mode of the coupled system is exquisitely sensitive to differential motion of the beams, producing optomechanical coupling right at the fundamental limit set by optical diffraction.

We show that, in addition to eichsnfield photonic thesiz cavity, the periodic patterning of the beam also produces a phononic bandgap cavity with localized mechanical modes having frequencies in the microwave regime. With the ability to readily interconvert photons and microwave-frequency sichenfield on the surface of a microchip, new chip-scale technologies can be created.

More information and software credits. Work in the optical domain has revolved around millimeter- or micrometer-scale structures using the radiation pressure force. In this thesis, two different nanometer-scale structures that use combinations of gradient and radiation pressure optical forces are described theoretically and demonstrated experimentally.

Browse by Author

Back-action cooling, for example, is being pursued as a means of achieving the quantum ground state of macroscopic mechanical oscillators. Because the optical and mechanical modes occupy a volume more thantimes smaller than the volume of a eicchenfield human cell, the optomechanical interaction in this system is again at the fundamental limit set by optical diffraction.

No commercial reproduction, distribution, display or performance rights in this work are provided. We discuss the eichenfleld of optomechanical crystals and provide new methods of calculating all the otptomechanical properties of the structures.