MATT EICHENFIELD THESIS

A Caltech Library Service. We call these photonic and phononic crystal bandgap cavities optomechanical crystals. These structures merge the fields of cavity optomechanics and nanomechanics into nano-optomechanical systsms NOMS. We discuss the future of optomechanical crystals and provide new methods of calculating all the otptomechanical properties of the structures. 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. With the ability to readily interconvert photons and microwave-frequency phonons on the surface of a microchip, new chip-scale technologies can be created. Abstract The dynamic back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing interest.

The second device focuses on just one of the doubly-clamped nanoscale beams of the Zipper. 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. In this thesis, two different nanometer-scale structures that use combinations of gradient and radiation pressure optical forces are described theoretically and demonstrated experimentally. 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. Optics; photonics; photonic crystals; phononic crystals; acoustics; physics; optomechanics; cavity optomechanics.

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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. More information and software credits. Citation Eichenfield, Matthew S. We show that, in addition to a photonic bandgap cavity, the periodic patterning of the beam also produces a phononic bandgap cavity with localized mechanical modes having frequencies in the microwave regime.

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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.

matt eichenfield thesis

Back-action cooling, for example, is being pursued as a means of achieving the quantum ground state of macroscopic mechanical oscillators. Abstract The maft back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing thedis. 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.

By comparison, in microwave devices, low-loss superconducting structures have been used for gradient-force-mediated coupling to a nanomechanical oscillator of picogram mass. We call these photonic and phononic crystal bandgap cavities optomechanical crystals.

In this thesis, two different nanometer-scale structures that use combinations of gradient and radiation pressure eiichenfield forces are described theoretically and demonstrated experimentally.

The miniscule effective volume of the mechanical mode corresponds to effective motional masses in the femtogram regime, which, coupled with the eichenffield optomechanical interaction and high optical and mechanical quality factors, allows transduction thesiz 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.

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We discuss the future of optomechanical crystals and provide new methods of calculating all the otptomechanical properties of the structures.

matt eichenfield thesis

Optics; photonics; photonic crystals; phononic crystals; acoustics; physics; optomechanics; cavity optomechanics. Cavity optomechanics in photonic and phononic crystals: No commercial reproduction, distribution, display or performance rights in this work are provided. Work in the optical domain has revolved around millimeter- or micrometer-scale structures using the radiation pressure force. 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.

A Caltech Library Service. These structures merge the fields of cavity optomechanics and nanomechanics into nano-optomechanical systsms NOMS.

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With the ability to readily interconvert photons and microwave-frequency phonons on the surface of a microchip, new chip-scale technologies can be created.

The dynamic back-action caused by electromagnetic forces radiation pressure in optical and microwave cavities is of growing interest. Because the optical and mechanical modes occupy a volume more thantimes smaller than the volume of a single human cell, the optomechanical maty in this system is again at the fundamental limit set by eichenfied diffraction.

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

matt eichenfield thesis