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.
Results
Showing 1 to 15 of 15 for “"Spin angular momentum"”.
-
Orbital And Spin Angular Momentum Light Generation, Interactions, Special Photons, And Applications In Liquids, Solids, Vapors And Biological Tissue Media
… This type of polarization is associated to the spin angular momentum (SAM) of a photon is described by , which indicates a left-handed () and right-handed () circularly polarized light respectively. Currently there are other exotic forms of polarizations described as cylindrical vector beams …
-
Exploiting the Spin Of Photons and Electrons in Light-Matter Interactions
… interaction, the conservation law of angular momentum requires the transfer of angular momentum of light to matter, which consequently couples light polarization to various state variables of materials, such as mechanical mo- tion, magnetization or charge current, thus gives rise to a …
-
Decoherence of Transverse Electronic Spin Current in Magnetic Metals
Transport of spin angular momentum (spin currents) in magnetic thin films is important for non-volatile spin-based memory devices and other emerging information technology applications. It is especially important to understand how a spin current propagates across interfaces and how a spin current …
-
Group theoretical analysis of in-shell interaction in atoms
… predicts configuration mixing in systems of high angular momentum L and of high spin angular momentum S containing three electrons in the 3s-3p-3d shell, but gives less accurate results when L and S are both small.</p> <p>I also show how effective nuclear charges may be calculated by a group …
-
Spin dependent reactions in an electronically excited helium discharge
The electron spin dependence of reactions involving helium metastable atoms is investigated using optical pumping and microwave diagnostic techniques. Wigner (1927) proposed that electron spin angular momentum is conserved in atomic collisions. This rule of elec-tron spin conservation is tested in …
-
A QED framework for nonlinear and singular optics
… may be valid. Analysis of the optical angular momentum operator delivers a division into spin and orbital parts satisfying electric-magnetic democracy, and determine a new compartmentalisation of the optical angular momentum. An analysis is performed on the recently rediscovered optical …
-
Photophysics of small molecule organo-metallic complexes for OLED applications
… transitions in organic materials are highly spin sensitive, as excitons form due to lower dipole moments. Triplet excitons cannot directly couple radiatively to the ground state, so unless additional processes to alter spin angular momentum exist 75% of excitations formed cannot emit light. I …
-
Dispersive Readout and Spin-State Spectroscopy of Industrially-Fabricated Silicon Quantum Dots
… focuses on reliable and scalable readout of spin qubits in gate-defined silicon complementary metal-oxide-semiconductor quantum dots. In particular, this thesis studies the spin states and Pauli spin blockade (PSB) physics of silicon quantum dots using scalable gate-based dispersive sensing …
-
Reversible and Irreversible Effects of Magneto-Ionic Gating: Exchange, Anisotropy, and Magnetization
… of novel magnetic properties including spin angular momentum, orbital angular momentum, and proximity-induced moments. This understanding provides the foundation for a systematic optimization of Co/Pd multilayer heterostructures which achieves the highest reversible solid-state …
-
Magnetic phases of large-spin ultracold bosons: quantum dimer models and spin liquid phases
… the plausibility of producing a quantum spin liquid (QSL) with ultracold bosonic atoms optically confined to the Mott insulating state. QSLs have received a great deal of attention for being an antiferromagnetic groundstate with many exotic properties, including the absence of local …
-
Element-resolved ultrafast magnetization dynamics in ferromagnetic alloys and multilayers
… decay was previously linked to the strength of spin-lattice coupling in pure Gd and Tb, with the stronger, direct spin-lattice coupling in Tb leading to a faster demagnetization. In GdTb, the demagnetization of Gd follows Tb on all timescales. This is due to the opening of an additional channel …
-
A matter of life and death: the formation and destruction of planetary bodies
… the formation of these planetesimals to the spinning motion around their own axis. Specifically, I show that a general mechanism exists, whereby objects that gravitationally collapse next to an external potential naturally acquire spin angular momentum that is aligned with their orbital …
-
Ultrafast laser driven spin generation in metallic ferromagnets
… dissertation presents experimental studies of spin generation in metallic ferromagnets (FM) driven by ultrafast laser light using a pump-probe technique. The pump light gives a driving force for spin generation by depositing energy or spin angular momentum on FM. The probe light measures spin …
-
Using Fundamental Properties of Light to Investigate Photonic Effects in Condensed Matter and Biological Tissues
… obtained and by utilizing light beams carrying spin angular momentum (SAM) and orbital angular momentum (OAM), the electron's orbital motion in a semiconductor can be altered, resulting in the formation of photogenerated spin-polarized electrons. OAM and SAM can be used to enhance …
-
Control of chiral optical and spin properties in low-dimensional perovskites
… symmetry breaking, giving rise to spin-selective and circularly polarized optical phenomena. The introduction of chiral organic cations breaks inversion and mirror symmetries and induces unique structural behavior in the absence of external magnetic fields, e.g., circularly …