Now showing items 21-40 of 174

    Development and study of novel mid-infrared frequency conversion sources 

    Nandy, Biplob Kumar (Date of defense: 2020-12-02)

    Tunable narrow-linewidth and broadband laser sources in the mid-infrared (mid-IR) wavelength range are extremely desirable in all time scales for their several useful applications in spectroscopy, imaging, optical communication ...

    Development of a high intensity Mid-Ir OPCPA pumped by a HO:YLF amplifier 

    Sánchez Peacham, Daniel Alexander (Date of defense: 2020-01-27)

    The continuous development of laser sources delivering ultra-short light pulses underpins much of the current progress in experimental science, particularly in the domain of physics concerned with strong-field phenomena. ...

    Development of novel imaging tools for selected biomedical applications 

    Olarte, Omar E. (Date of defense: 2014-03-20)

    In the quest for better and faster images of cellular and subcellular structures, biology-oriented optical microscopes have advanced significantly in the last few decades. Novel microscopy techniques such as non-linear ...

    Development of novel multimodal light-sheet fluorescence microscopes for in-vivo imaging of vertebrate organisms 

    Bernardello, Matteo (Date of defense: 2022-06-14)

    The observation of biological processes in their native environments is of critical importance for life science. While substantial information can be derived from the examination of in-vitro biological samples, in-vivo ...

    Device-independent certification of quantum resources 

    Supic, Ivan (Date of defense: 2018-09-19)

    The last two decades have been a very fruitful period for the fundamental research related to quantum information theory. Today we have a fairly good understanding of how intrinsically quantum properties affect various ...

    Diffuse optical monitoring of cerebral hemodynamics in experimental and clinical neurology 

    Blanco Núñez, Igor D. (Date of defense: 2015-01-31)

    The study of the brain using diffuse optical methods has progressed rapidly in the recent years. The possibility of studying the cerebral microvasculature in addition to the portability and low cost of these devices, opens ...

    Double resonant character in an optical cavity for high performance and stable polymer solar cells 

    Liu, Quan (Date of defense: 2018-03-23)

    Solution-processed thin film solar cells emerged as very promising photovoltaic technologies suitable for a low cost roll-to-roll upscale production. Such thin film character also ensures lightweight and flexibility for ...

    Dynamics of optically levitated nanoparticles in high vacuum 

    Gieseler, Jan (Date of defense: 2014-02-03)

    Nanotechnology was named one of the key enabling technologies by the European Commission and its tremendous impact was envisioned early by 20th century physicist R.Feynman in his now oft-quoted talk "Plenty of Room at the ...

    Dynamics of quantum mixtures 

    Guenther, Nils Eric (Date of defense: 2021-09-08)

    At sufficiently low temperatures, fluids of bosonic particles may undergo a phase transition, below which a Bose-Einstein condensate (BEC) forms. The BEC is one of the most fundamental concepts in many-body quantum physics ...

    Dynamics of spinor fermions 

    Ebling, Ulrich (Date of defense: 2014-11-03)

    Ultracold atomic gases have established themselves as quantum systems, which are clean and offer a high degree of control over crucial parameters. They are well isolated from their environment and thus offer the possibility ...

    Elliptically polarized light for depth resolved diffuse reflectance imaging in biological tissues 

    Sridhar, Susmita (Date of defense: 2016-10-05)

    Polarization gating imaging is a popular and widely used imaging technique in biomedical optics to sense tissues, deeper volumes, and also selectively probe sub-superficial volumes. Due to the "polarization memory" effect ...

    Entanglement and Bell correlations in strongly correlated many-body quantum systems 

    Piga, Angelo (Date of defense: 2020-03-30)

    During the past two decades, thanks to the mutual fertilization of the research in quantum information and condensed matter, new approaches based on purely quantum features without any classical analog turned out to be ...

    Entanglement and state characterisation from two-photon interference 

    Beduini, Federica A. (Date of defense: 2015-11-3)

    This thesis analyses the effects of two-photon interference in a polarisation squeezed state under two different points of view: on one hand, it presents a new method to obtain the temporal wavefunction of a state of two ...

    Entanglement, Bell’s inequalities and coherence : new ideas and new scenarios 

    Vallés Marí, Adam (Date of defense: 2017-02-14)

    The work presented in this thesis, mostly experimental, is based on three main pillars: the concepts of entanglement, Bell's inequalities and coherence. Entanglement is a very special type of correlation that can exist ...

    Exact diagonalization studies of quantum simulators 

    Raventós Ribera, David (Date of defense: 2019-04-15)

    Understand and tame complex quantum mechanical systems to build quantum technologies is one of the most important scientific endeavour nowadays. In this effort, Atomic, molecular and Optical systems have clearly played a ...

    Experimental evidence for the quantum condensation of ultracold dipolar excitons 

    Alloing, Mathieu (Date of defense: 2014-05-28)

    In this thesis, we report experimental evidence of a "gray" condensate of excitons, as predicted theoretically by M. Combescot et al. Most importantly, the condensate is characterized by the macroscopic population of dark ...

    Experimental tools for quantum networking operations with single photons and sinlge ions 

    Huwer, Jan Henning (Date of defense: 2014-01-29)

    One promising approach for future quantum networks is the combination of strings of trapped ions as quantum-information processors with entangled photon pairs produced by spontaneous parametric down conversion (SPDC) to ...

    Exploring flatland nano-optics with graphene plasmons 

    Woessner, Achim (Date of defense: 2017-05-11)

    Plasmons are charge oscillations coupled to electromagnetic radiation. One of their most intriguing properties is their deep subwavelength confinement resulting in strongly enhanced light-matter interaction. Metal plasmons ...

    Exploring intersubbands in 2D materials 

    Schmidt, Peter, 1989- (Date of defense: 2019-04-16)

    Transition metal dichalcogenides (TMDs) are semiconducting layered materials that can be isolated up to the limit of a single atomic layer. Next to graphene, they are some of the most intensively studied materials within ...

    Exploring quantum memory schemes in cold atoms for quantum repeaters 

    Heller, Lukas (Date of defense: 2023-11-06)

    (English) Quantum memories are devices that are able to store photonic quantum states and entanglement. Future quantum networks, which could enhance cybersecurity through quantum key distribution, improve the precision in ...