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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Optomechanics"”.
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Nonlinear Cavity Optomechanics in Diamond
… consists of spins, photons, and phonons. Cavity optomechanics provides a platform to increase the interaction time between photons and phonons. By increasing the average number of photons and phonons, the coupling rates will be enhanced, and better control over the system could emerge as a …
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Periodic driving and nonreciprocity in cavity optomechanics
Part I of this thesis is concerned with cavity optomechanical systems subject to periodic driving. We develop a Floquet approach to solve time-periodic quantum Langevin equations in the steady state, show that two-time correlation functions of system operators can be expanded in a Fourier series, …
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TUNING AND OPTOMECHANICS OF COUPLED PHOTONIC CRYSTAL NANOBEAM CAVITIES
This thesis focuses on mechanical tuning and optomechanics of photonic devices based on coupled photonic crystal nanobeam cavities, with studies including nano fabrication process development, device tuning with NEMS actuators, investigation of optical gradient force and tunable cavity …
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Optomechanics of two- and three-dimensional soft photonic crystals
… and leverage that understanding to explain the optomechanics of actual 2-D and 3-D soft photonic crystals undergoing similar symmetry breaking nonlinear deformations. We first study the optomechanics of two classes of 3-D soft photonic crystals: (1) hydrogel and (2) elastomer based material …
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Experimental and Novel Analytic Results for Couplings in Ordered Submicroscopic Systems: from Optomechanics to Thermomechanics
Theoretical modelling of challenging multiscale problems arising in complex (and sometimes bioinspired) solids are presented. Such activities are supported by analytical, numerical and experimental studies. For instance, this is the case for studying the response of hierarchical and …
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Conditional Mechanical Squeezing of a Micromechanical Oscillator Approaching the Quantum Regime
Optomechanics is a rapidly developing field studying systems with optical and mechanical resonators coupled via radiation pressure. This coupling plays a key role in precision displacement and momentum sensing like in gravitational wave detection and atomic force microscopy. Recently the field has …
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Whispering gallery mode microcavities: from fabrication to applications
… were studied for topics as diverse as optomechanics, photonics, laser tuning and spectroscopy. The WGMs in the microsphere pendulum sense its mechanical mode through fibre taper coupling of light. Its properties in the evanescent light fields and its optomechanical transduction …
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Manufacturing and aerostatic tunability of opto-mechano-fluidic resonator and its application in viscosity sensing
Cavity optomechanics experiments parametrically couple the phonon modes and photon modes in microresonators and various optical systems have been investigated. However, because of the increased acoustic radiative losses during direct liquid immersion of optomechanical devices, almost all published …
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Nanophotonic Optomechanical Devices for Torque Magnetometry
… resonators. Over the years, the field of cavity optomechanics has demonstrated ever increasing sensitivity, with measurements limited by the quantum motion of a device possible in state-of-the-art devices. In this thesis, a nanophotonic cavity is integrated into a nanomechanical resonator for …
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Optomechanical Spin-Photon Interface in Wide-Bandgap Materials
… that holds tremendous potential for quantum optomechanics and spin-optomechanics applications owing to its beneficial mechanical properties.
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Non-suspended optomechanical cavities
… used by a quantum communication network. Cavity optomechanics enhances photon-phonon interactions by co-localization of optical fields and mechanical resonances. The implementation of phononic localization in the majority of cavity optomechanical devices relies on creating suspended devices whose …
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Designing a beam combiner for faint limiting magnitudes in optical interferometry
… nitrogen operating temperature. The cryogenic optomechanics are described as well as a series of laboratory tests of the fringe contrast, spectral resolution and throughput to verify the instruments performance. In addition to the development of FOURIER I discuss a numerical simulation of an …
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Novel mechanical alignment and component fabrication for wavelength-selective optical switches
… experimental WSS system are then described. The optomechanics require a unique combination of accuracy, stability and modularity, combined with the unique 2D architecture. An evaluation is made of the optomechanical techniques used for comparable systems. This demonstrates that three key areas of …
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Radiation Pressure induced Nonlinearity in Micro-droplet
… led to a wide range of applications in sensing, optomechanics, nonlinear optics, and quantum optics. In this dissertation, we introduce a new type of whispering gallery resonators (WGRs) based on micro-droplets in an immiscible liquid-liquid system. Within such an all-liquid platform, it is …
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Suppression of disorder-induced scattering in optomechanical systems
… single-frequency laser through parity-selective optomechanics. Such optomechanical interaction is achieved by Brillouin scattering, owing to the phase-matching condition. This method enables complete linear optical isolation without requiring magnetic fields. Instead, the isolation originates …
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High-throughput sensing of bulk fluids and freely flowing particles with opto-mechano-fluidics
High-Q optical resonators have revolutionized label-free sensing of nanoparticles, down to the resolution of individual viruses and single molecules. However, these laboratory demonstrations commonly encounter practical constraints that remain unresolved. Specifically, optical resonator detection …
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Quantum acoustics with a released thickness-mode mechanical resonator
The circuit quantum acoustodynamics (cQAD) platform integrates the strong nonlinearity of superconducting Josephson elements with high-quality mechanical resonators, enabling potential applications in quantum memories, transducers, and sensors. A central challenge in this field is achieving strong …
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FUNDAMENTAL TECHNOLOGIES FOR THE OPTO MECHANICAL GYROSCOPE
Opto-mechanics is the convergence of optics and mechanics towards the understanding of novel physical phenomenon and the achievement of cutting edge applications. From the effects of radiation pressure on the study of gravitational waves in a LIGO to the study of the quantum mechanical ground state …
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High-throughput real-time sensing in optomechanical systems with opto-mechano-fluidics
Embargo set by: Seth Robbins for item 121157 Lift date: 2024-01-12T22:51:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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The Stochastic Dynamics of Optomechanical Sensors for Atomic Force Microscopy
This work explores the stochastic dynamics and important diagnostics of a mechanical resonator (nanobeam) used in cavity optomechanical sensors for atomic force microscopy. Atomic force microscopy (AFM) is a tool to image surface topology down to the level of individual atoms. Conventional AFM has …
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