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 10 of 10 for “"Polariton condensates"”.
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Boson Josephson Junctions based on Exciton-Polariton Condensates
… in dilute quantum gases of excitons and exciton-polaritons. An exciton is a kind of elementary excitation in semiconductors, which, through strong coupling with photons, can form a light-matter hybrid particle called an exciton-polariton. Similar to superconducting systems, excitons and …
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Unconventional computing platforms and nature-inspired methods for solving hard optimisation problems
… networks of nonlinear oscillators, lasers, condensates, and superconducting qubits, are proposed and realised to address challenging computational problems from various areas of social and physical sciences and technology. Understanding the underlying physical process by which the system …
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Spin and lattice properties of optically trapped exciton polaritons
Exciton-polaritons are the fundamental excitations arising from the strong coupling of quantum well excitons and cavity photons in semiconductor microcavities. They are compound bosons for which stimulated scattering and macroscopic occupation of single quantum states can occur at sufficiently high …
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Optical control of polariton condensation and dipolaritons in coupled quantum wells
Polaritons are lightweight bosonic quasiparticles that result from the strong coupling of light with an exciton transition inside a microcavity. A sufficiently dense cloud of polaritons condenses into a polariton condensate, a state of matter showing macroscopic coherence and superfluid properties, …
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Pattern-forming in non-equilibrium quantum systems and geometrical models of matter
… The first one is devoted to the dynamics of polariton condensates, with particular attention to their pattern-forming capabilities. In many configurations of physical interest, the dynamics of polariton condensates can be modelled by means of a non-linear PDE which is strictly related to the …
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Exciton-polaritons in thermal equilibrium : from Bose-Einstein condensation to exciton-polaritonics
… collective system, namely, microcavity exciton-polariton Bose-Einstein condensates. Microcavity exciton-polaritons, hereafter simply polaritons, are bosonic quasiparticles formed in a resonant semiconductor microcavity by coupling the excitonic polarizabilities in quantum wells to the transverse …
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Photostabilization of J-aggregate cyanine dyes for exciton-polariton based devices
… allowed for the creation of room temperature polariton condensates, superfluids, and other exotic phenomena. Using J-aggregates, the aggregated form of cyanine organic dyes, we have previously fabricated light-emitting devices that demonstrated the first ever electrically pumped polariton …
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Excitations in superfluids of atoms and polaritons
… to the study of excitations in atomic and polariton Bose-Einstein condensates (BEC). These two specimens are prime examples for equilibrium and non equilibrium BEC. The corresponding condensate wave function of each system satisfies a particular partial differential equation (PDE). These …
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Nonlinear Processes in Room Temperature Exciton-Polaritons
… hybrid light-matter states known as exciton-polaritons form, leading to enhanced light matter interaction, modified material properties, and novel quantum phenomena. In this thesis, we explore the phenomenology of exciton-polaritons in strained TMD microcavities, 2D perovskites, fluorescent …
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Asymmetric Structures in Systems of Non-equilibrium Bose-Einstein Condensates
… of systems of interacting Bose-Einstein condensates. The focus of the work is on non-equilibrium condensates that exist within gain-dissipative systems, such as polaritonic or photonic condensates. We first elucidate the nature of an “asymmetric dyad”. In such a structure, two interacting …