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 1969 for “"photon"”.
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Strong proton-photon interactions at the single-photon level
Engineering light at the single photon level is a long-standing goal in physics. In this thesis, we investigate optical nonlinearities at the single photon level orchestrated by an optical cavity. We demonstrate an all-optical transistor where one stored 'gate' photon controls the propagation of a …
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Dynamic photon painting
Photon-based radiosurgery is widely used for treating local and regional tumors. The key to improving the quality of radiosurgery is to increase the dose falloff rate from high dose regions inside the tumor to low dose regions of nearby healthy tissues and structures. Currently, most radiosurgeries …
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Integrated nonlinear photonic circuits for mediating and detecting photon-photon interactions
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Photon-efficient computational imaging with single-photon avalanche diode (SPAD) arrays
Single-photon avalanche diodes (SPADs) are highly sensitive photodetectors that enable LIDAR imaging at extremely low photon flux levels. While conventional image formation methods require hundreds or thousands of photon detections per pixel to suppress noise, a recent computational approach …
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A photon-photon interface with an atomic ensemble in an optical cavity
… I demonstrate four such devices for optical photons traveling in two different modes: an all-optical switch and transistor, a nondestructive photon detector, a phase shifter, and a quantum state generator. These devices rely on a nonlinear optical interface comprised of a few thousand atoms …
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Frequency-Filtered Photon Correlations
… for measuring and calculating frequency-filtered photon correlations is to filter the source field of interest with a Lorentzian-type filter, e.g., a tunable single-mode cavity or detector atom. However, given the inverse relation between a filter’s bandwidth and temporal response, there is …
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Measurement of cross section times branching ratio for W boson + photon and Z boson + photon and search for anomalous W boson-photon and Z boson-photon couplings at 1.8 TeV
… during the 1992-93 run. In a search for central photons ($\vert\eta\vert\ <$ 1.1) with transverse energy above 7 GeV and angular separation from the muon by at least $\Delta R$ = 0.7 we find 7 $W\gamma$ and 4 $Z\gamma$ candidates. This translates into cross section times branching ratios of 9.0 …
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Experimental Studies of Radiation Reaction and Photon-Photon Collisions in Ultrahigh Intensity Regimes
… of the field of QED is the realisation of a photon-photon collider, one in which pairs of particles and anti-particles may be produced. While there are various mechanisms which entail the production of an electronpositron pair from photon-photon collisions, the most fundamental variant of the …
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Untersuchung der Produktion charmhaltiger Mesonen in der Photon-Photon-Streuung mit dem OPAL-Experiment
Die Produktion von Charm-Quarks in der Photon-Photon-Streuung wird ueber <br>den Nachweis charmhaltiger Mesonen untersucht. Die Arbeit basiert <br>auf den Daten, die mit dem OPAL-Detektor am <br>Elektron-Positron-Speicherring LEP am CERN in Genf in den Jahren <br>von 1989 bis 1998 aufgenommen …
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Bestimmung des totalen hadronischen Wirkungsquerschnitts in der Photon-Photon-Streuung mit dem OPAL-Detektor
… <br>Hierbei ist Wgg die invariante Masse des Photon-Photon-Systems. <br>Dies geschieht durch Entfalten der unvollständig rekonstruierten <br>invarianten Masse Wrek des hadronischen Endzustandes <br>zu der invarianten Masse Wgg des Photon-Photon-Systems. <br>Aus dem differentiellen …
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Photon Statistics in Disordered Lattices
… coherent light traversing disordered photonic lattices and its dependence on the disorder class, the level of disorder and the excitation configuration at the input. Throughout the dissertation, two disorder classes are considered, namely, diagonal and off-diagonal disorders. The …
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Fast scanning two-photon microscopy
Fast scanning two-photon microscopy coupled with the use light activated ion channels provides the basis for fast imaging and stimulation in the characterization of in vivo neural networks. A two-photon microscope capable of fast scanning using acousto-optic deflectors was designed and implemented. …
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Cavity modified atom-photon interaction
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1989.
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Photon isolation and jet substructure
We introduce soft drop isolation, a new photon isolation criterion inspired by jet substructure techniques. Soft drop isolation is collinear-safe and is equivalent to Frixione isolation at leading order in the small R limit. However, soft drop isolation has the interesting feature of being …
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Electron photon calculations using MCNP
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1998.
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SAW-driven single-photon sources and photon detectors fabricated on an undoped GaAs/AlGaAs quantum well
… interest in quantum information systems based on photonic qubits. Devices able to emit pure single-photon states on demand and detect incoming single photons in the system are fundamental building blocks for the realisation of a quantum photonic scheme. Advances in controlling single carriers have …
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Photon-Number Resolving by Superconductive Devices
… fields are due to non-ideal devices: both single photon sources and single photon detectors. In these field of applications, detectors require to be able to resolve the number of photons in a light pulse. Presently state of the art indicates that classical semiconductor light detectors (i.e. …
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