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 875 for “"photons"”.
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Complete Temporal Characterization of Single Photons
… show the results of testing our method on single photons heralded from bi-photons generated via four-wave mixing in an atomic vapor. We develop an appropriate theoretical model for our experimental settings and describe the involved calculations explicitly. The obtained experimental results show …
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Efficient Use of Photons in a Photobioreactor
… for converting energy from electricity to useful photons which are defined by the antenna pigments of the photosynthetic microorganism. The photons produced by a light source are limited. To optimize usage of these photons, two methods are proposed (one) development of light guides which would be …
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Advanced tests of nonlocality with entangled photons
… our work in using optimized sources of entangled photons to perform the long-sought loophole-free Bell test. This landmark experiment invalidates local realism to the best that science will allow. Beyond answering questions on reality, these Bell tests have a important application in generating …
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Quantum Interaction of Infrared Photons and Plasmas
Made available in DSpace on 2014-12-12T20:54:41Z (GMT). No. of bitstreams: 1 7804008.pdf: 3707342 bytes, checksum: aec45fc96c71f241eadddaa96fc8a1dd (MD5) Previous issue date: 1977
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Proton Compton effect for 300 MeV photons
… measurements of the elastic scattering of photons by protons have been taken at the University of Illinois Betatron using a spark chamber technique. The betatron was run at 335 MeV using the newly installed radio frequency cavity. This allowed measurements to be taken at the maximum of the …
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Designing Visual Intelligence from Photons to Action
… capture the temporal propagation of individual photons, enabling the detection of objects around corners. This sensing capability allows us to develop robots that effectively anticipate and avoid hidden obstacles, reducing navigation time by 50% and overall trajectory length by 33%. Together, …
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Strongly interacting photons via Rydberg-Rydberg interactions
… viewed as strong interactions between individual photons mediated by the medium. Here, we achieve such strong interactions by coupling the photons to highly polarizable Rydberg states with a phenomena called electromagnetically induced transparency (EIT). The strong van der Waals or dipole-dipole …
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Computational imaging with small numbers of photons
… detectors that are sensitive to individual photons, obtaining accurate images requires hundreds of photon detections at each pixel to mitigate the shot noise inherent in photon-counting optical sensors. In this thesis, we develop computational imaging frameworks that allow accurate …
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Calibration of Infrared Photons in Cryogenic Germanium Detectors
… and that is what lead to the use of infrared photons. Once we can calibrate and understand the behavior of infrared photons in germanium detectors, they can be utilized in calibrating germanium detectors at the lower energy scale. Therefore, we performed the infrared calibration measurement …
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Quantum Semiconductor Structures Dressed with Terahertz Cavity Photons
… of coherent coupling of solids with cavity photons. Because of the giant dipole moments associated with resonances in solids, compared to atomic dipoles, uncharted regimes of strong and ultrastrong coupling are currently explored in various systems, which in turn offer unconventional ways of …
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Semiconductor-generated entangled photons for hybrid quantum networks
… in the deterministic generation of single photons and polarization entangled photon pairs are semiconductor InAs/GaAs quantum dots grown by the Stranski-Krastanov method. Despite remarkable progress in the last twenty years, complex quantum optical protocols could not be realized due to low …
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Retrieving Information from Scattered Photons in Medical Imaging
In many medical imaging modalities, as photons travel from the emission source to the detector, they are scattered by the biological tissue. Often this scatter is viewed as a phenomenon that degrades image quality, and most research is focused on designing methods for either discarding the …
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Neutron Spectra From Mono-Energetic Photons on Bismuth
Made available in DSpace on 2015-05-12T21:41:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6607762.PDF: 3779043 bytes, checksum: 6250bdff54e5e8bc181563817d8e11cc (MD5) Previous issue date: 1966
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Coherent photons from a solid-state artificial atom
… excitation, but also access to the single photons scattered in response by the quantum dot. Further, for a distributed computer architecture where nodes of few quantum bits are interlinked via optical communication channels photonic quantum bits are required to faithfully transmit the …
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Three Grains, Two Photons and a Colourful Diamond
Exploring how light interacts with physical systems is an elegant and powerful way to unravel processes occurring at different scales, from bulk materials to single atoms. In this thesis, we employ several microscopy and spectroscopy techniques to investigate the local optoelectronic properties of …
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An ultrabright, narrowband source of polarization-entangled photons
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Strong coupling between microwave photons and nanomagnet magnons
Coupled microwave photon-magnon hybrid systems offer promising applications by harnessing various magnon physics. At present, in order to realize high coupling strength between the two subsystems, bulky ferromagnetic insulators with large spin numbers are utilized, which limit their potential …
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Tomodensitométrie par comptage de photons avec discrimination en énergie
… Ce détecteur, qui compte individuellement les photons X et mesure leur énergie, pourrait jouer un rôle important dans la quête de réduction de la dose. Même si ce nouveau développement n'a pas été motivé en réponse directe à l'accroissement de la dose, son avènement arrive à un moment très …
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Quantum interference with undetected photons for sensing and imaging
Quantum interference with undetected photons has gained significant attention in the past ten years due to its potential to decouple the probing and the detection of an active sensing system. The technique is based on correlated photon pairs: one photon interacts with the analyte, and the signature …
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Shining light through walls : a search for dark photons
The Standard Model of particle physics, although successful, is known to be defcient both theoretically and experimentally. Many proposed extensions to the SM predict the existence of Weakly Interacting Slim Particles (WISPs). In this thesis the construction and results of the CASCADE microwave …
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