Global ETD Search
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 22 for “"Optical resonator"”.
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Studies in optical resonator gyroscopes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
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Enhanced light-atom interaction in an optical resonator
… photonic and atomic state preparation. With an optical cavity and an ensemble of cesium atoms, we demonstrate that, for two light fields [psi]s (signal) and [psi]A (ancilla) that have only weakly interacted with one another, measurements on the ancilla can produce substantial conditional change …
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Squeezing collective atomic spins with an optical resonator
… between an ultracold atomic ensemble and an optical resonator serves to entangle the atoms and deform the uncertainty distribution of the collective hyperfine spin so that it is narrower in some coordinate than would be possible if the atoms were uncorrelated. The first method uses the …
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Radiative decay and level shift on an atom in an optical resonator
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1988.
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The microlaser--study of laser oscillation with one atom in an optical resonator
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Hybrid approaches to quantum information using ions, atoms and photons
… linear chains of atomic ions with photons via an optical resonator. The first experimental realization of a hybrid cold-ion / cold-atom system is presented in the form of Yb atoms trapped in a magneto-optical trap overlapped with Yb+ ions stored in a radio-frequency (RF) planar Paul trap. The …
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MICROSCOPIC SURFACE ELECTROCHEMICAL ACTUATORS FOR VOLTAGE-TUNABLE OPTICAL ELEMENTS
Voltage controllable optical resonators (VCOR) are critical to the world of photonics, theyallow dynamic tuning of the amplitude and phase of light via electric modulation of two semi reflective plates. Here, I present a novel application of a voltage-driven micro actuator technology, the surface …
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461nm laser for studies in ultracold neutral strontium
… nm can be used in laser cooling and trapping; optical imaging, Zeeman slowing, and photoassociative spectroscopy. We produce light at this wavelength by converting infrared light at 922nm from various IR sources, notably a Ti:Sapphire laser, via second harmonic generation in a frequency …
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External cavity laser label-free biosensor
… laser, we demonstrate a new type of label-free optical biosensor that achieves a high quality factor through the process of stimulated emission, while at the same time providing high sensitivity, large dynamic range and simple detection instrumentation. The photonic crystal is fabricated …
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Stimulated emission from biological materials and novel optical resonators for diagnostic and imaging applications
The first detailed optical characterization of any biological laser, providing spectral, temporal, threshold, and polarization characteristics for the flavin mononucleotide biomolecular laser, is presented here. In addition, our investigation of natural, bio-engineered, and complex biological laser …
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Radiation Pressure induced Nonlinearity in Micro-droplet
Optical resonators such as silica micro-spheres and micro-toroids can support whispering gallery modes (WGMs), where light circulates near the resonator surface and is confined by the total internal reflection at the dielectric boundary. Such resonators can exhibit very high quality (Q) factors, …
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Precision Tuning of Silicon Nanophotonic Devices through Post-Fabrication Processes
… processes. These devices include numerous optical resonator designs as well as slow-light waveguides. Optical resonators are used to confine photons both spatially and temporally. In recent years, there has been much research, both theoretical and experimental, into improving the design of …
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Planar chalcogenide glass materials and devices
… include high-speed telecommunication, on-chip optical interconnect, imaging and photovoltaics. Another important area planar photonic technologies may penetrate into is biochemical sensing. High precision optical metrology tools can be applied to detect optical property changes associated with …
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Cavity coupled photonic crystal enhanced fluorescence for high sensitivity biomarker detection
… of biomarkers in samples, the use of dielectric optical resonators has increased dramatically. These photonic crystals make fluorophores emit more light through a process called enhanced fluorescence which in turn allows for more signal to be collected due to these biomarkers. Advances in such …
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Magneto-optical and multiferroic oxide thin films, integrated nonreciprocal photonic devices and multiferroic memory devices
… the utility of current storage, processing and optical isolator technologies. In this thesis, we present three categories of studies on complex oxide growth using pulsed laser deposition (PLD) and structural, magnetic, magneto-optical and ferroelectric characterization. We first focused on …
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Squeezed states for advanced gravitational wave detectors
… experiment we used a 2-m-long, high-finesse optical resonator to produce frequency-dependent squeezed quadrature rotation around 1.2kHz. This demonstration of audio-band frequency-dependent squeezing uses technology and methods that are scalable to the required rotation frequency for Advance …
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Efficient and coherent frequency conversions and nonlinear interference in optical parametric and atomic Raman processes
… Raman scattering is improved by a high-finesse optical resonator or stimulated Raman conversion. It was recently found that the atomic spin wave initially built through electromagnetically induced transparency or a weak Raman process can actively enhance the Raman frequency conversion. An …
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Early Diagnosis of Alzheimer's Disease and Studying Binding to Opioid Receptors using Whispering Gallery Mode Microtoroid Biosensors
… quality factor, whispering gallery mode (WGM) optical biosensors offer several advantages over other biosensors including higher sensitivity and label-free capability. At the resonance condition, light circulates within the perimeter of the WGM resonator by total internal reflection and …
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Single cancer cell detection with optofluidic intracavity spectroscopy
… monitoring. Non-destructive and non-chemical optical methods may help reduce the complexity and cost of related test, making them more available to the public. The label-free technique of optofluidic intracavity spectroscopy (OFIS) uses light transmitted through a cellular body in a …
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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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