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 41 for “"single-photon sources"”.
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Self-organized Quantum Dots for Single Photon Sources
Die effiziente Erzeugung von einzelnen Photonen oder verschränkten Photonenpaaren ist der Schlüssel für neuartige Quantenkryptografie und Quantencomputer. Einzelne Halbleiter Quantenpunkte (QPe) mit ihren einzigartigen elektronischen Eigenschaften, haben bereits bewiesen, dass sie solche Photonen …
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Towards MDI QKD using Quantum Dot Single Photon Sources
… common attacks are detector-based attacks, and photon-number splitting attacks. For my thesis, I designed the first implementation of Measurement-Device-Independent Quantum Key Distribution (MDI QKD) using quantum dot single photon sources. This form of QKD is not only information-theoretic …
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Microscopy and Spectroscopy of Materials for Blue Single Photon Sources
… shown much interest in recent years as potential single photon emitters. The InGaN-GaN system in particular offers comparably high temperature emission, polarised emission, and access to the green and blue regions. This has the advantages of completing the visible spectrum, and being the region in …
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On-chip single photon sources based on quantum dots in photonic crystal structures
… quantum information processing, readily scalable photonic circuits will be required. A major obstacle for this scalability is the monolithic integration of quantum light sources with the photonic circuit on a single chip. This dissertation presents the experimental demonstration of different …
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Development of self-assembled hyperbolic metamaterial-based photonic devices for enhanced single-photon sources
L'abstract è presente nell'allegato / the abstract is in the attachment
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AN EXPLORATION OF DEFECT-BASED SINGLE PHOTON SOURCES: ZINC OXIDE AND HEXAGONAL BORON NITRIDE
… point defects in wide bandgap semiconductors are single photon sources with applications in quantum optics, precision sensing, and quantum information processing technologies. Although the nitrogen-vacancy center in diamond has historically garnered the most attention, efforts to discover novel …
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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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Analysis of a Deterministic Entangled Photon Pair Source using Single Photons
… involve the use of deterministic entangled photon pair sources. On the other hand heralded entangled photon pair sources have been proposed independently both with parametric down conversion source and single photon sources. We modify the latter scheme to implement it as an on demand …
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Enhancing the Light output of Solid State Emitters
… nanostructures as a stepping stone for use as single photon sources. The primary nanostructures studied are III-V based type-II emitting quantum dots/quantum rings (QDs/QR’s), which emit at telecom wavelengths either in the O-band (GaSb/GaAs QRs) or the C-band (InAs/GaAs QDs capped with …
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Integrated optical components for quantum key distribution
… trapdoor functions. However, as computational resources become more abundant with the fast development of super- and quantum computers, relying on such methods for communication security becomes risky. Quantum key distribution (QKD), is a potential solution that can allow theoretically secure key …
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Indium arsenide quantum dots for single photons in the communications band
… epitaxial Indium Arsenide (InAs) quantum dots as single photon sources in the optical communications C-Band (Conventional Band; 1535 nm-1565 nm wavelength). First, the underlying theory of semiconductor quantum dots and the necessary tools from quantum optics are reviewed. Next, a detailed …
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Programmable nanophotonics for quantum information processing and artificial intelligence
… public interest. As a hardware platform, silicon photonics may play an important role in enabling quantum and classical information processing architectures. Here, I will discuss my thesis work on developing a programmable nanophotonic processor in silicon, as well as applications of this …
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Quantum-confined excitons in 2-dimensional materials
… method by which we can deterministically create single-photon emitting sites in 2d-TMDs, in large-scale arrays. These we call quantum dots (QDs): quantum confinement potentials within semiconductor materials which can trap single-excitons. The single excitons recombine radiatively to emit …
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Superconducting nanowire single-photon detectors on aluminum nitride photonic integrated circuits
With recent advances in integrated single-photon sources and quantum memories, onchip integration of high-performance single-photon detectors becomes increasingly important. The superconducting nanowire single-photon detector (SNSPD) is the leading single-photon counting technology for quantum …
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Quantum Dots In Two-Dimensional Tungsten Diselenide
<p>This work focuses on the investigation of single and double quantum dots in two-dimensional transition metal dichalcogenide tungsten diselenide (WSe_2) as a means to evaluate the valley degree of freedom as a potential qubit and ambipolar tungsten diselenide monolayers as single photon sources. …
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Towards integrated silicon photonic architectures for quantum information processing
Silicon photonics is a highly-promising platform for on-chip quantum information processing. Linear optical quantum computing architectures necessitate the implementation of integrated single photon sources, passive and active optics, and single photon detectors. This thesis presents the …
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FLUORESCENT ULTRASHORT NANOTUBES FROM DEFECT-INDUCED CHEMICAL CUTTING
Ultrashort single-walled carbon nanotubes (SWCNTs) that fluoresce brightly in the shortwave infrared shows great potentials in bioimaging, sensing and enabling room-temperature, solid-state single-photon sources. However, this novel family of materials remains largely unexplored due to the …
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Photonic quantum computers and communication systems
… There has been growing interest in photonic implementations of quantum processors as they offer relatively long coherence lengths, precise state manipulation, and efficient measurement. In this thesis, we first present experimental techniques to generate on-chip, photonic quantum …
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