000348992 001__ 348992
000348992 005__ 20240219111914.0
000348992 0247_ $$2doi$$a10.22032/DBT.59567
000348992 0247_ $$2URN$$aurn:nbn:de:gbv:27-dbt-20240212-103326-001
000348992 037__ $$aGSI-2024-00453
000348992 041__ $$aEnglish
000348992 1001_ $$0P:(DE-HGF)0$$aBaghdasaryan, Baghdasar$$b0$$eCorresponding author
000348992 245__ $$aSpatio-spectral engineering of entangled and single photons in parametric down-conversion
000348992 260__ $$aJena$$bThüringer Universitäts- und Landesbibliothek Jena$$c2023
000348992 300__ $$a103 S.
000348992 3367_ $$2DataCite$$aOutput Types/Dissertation
000348992 3367_ $$2ORCID$$aDISSERTATION
000348992 3367_ $$2BibTeX$$aPHDTHESIS
000348992 3367_ $$02$$2EndNote$$aThesis
000348992 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1708337812_2251034
000348992 3367_ $$2DRIVER$$adoctoralThesis
000348992 502__ $$aDissertation, Friedrich-Schiller-Universität Jena, 2023$$bDissertation$$cFriedrich-Schiller-Universität Jena$$d2023$$o2023-12-14
000348992 520__ $$aPhoton pairs generated through SPDC inherently exhibit spatio-spectral coupling, which implies that photons with different spatial DOFs possess varying spectra. While quantum optics applications often focus on either spatial or spectral DOFs independently, the correlation between them poses a fundamental challenge in protocols involving entangled photon sources or single-mode photon states. Theoretical studies on SPDC, that address both space and spectrum together, are mostly limited to approximate wave functions of photon pairs or involve numerical computations. Such theoretical studies usually consider either monochromatic signal and idler photons (the narrowband approximation), loosely focused pump and collection beams (the plane wave approximation), or infinitesimally thin crystals (the thin crystal approximation). This dissertation aims to bridge the gap between the fundamental theory of SPDC and its practical applications. In particular, we have developed a comprehensive theory that does not rely on a specific pump beam or nonlinear crystal and goes beyond the common narrowband, plane wave, and thin crystal approximations. The developed approach accurately describes the inseparability of spatial and spectral DOF and applies to a wide range of experimental setups. Furthermore, we show that the origin of the spatio-spectral coupling is closely related to the Gouy phase of the interacting beams. We utilize the developed theory, taking into account the spatio-spectral coupling insights, to control the entanglement of photon pairs from SPDC. As an application, we shape the spatial distribution of the pump beam to design an efficient source of high-dimensional entangled states in the spatial DOF. In our second application, we tailor simultaneously the effective nonlinearity of the crystal and spatial distribution of the pump, to engineer single-mode photons.
000348992 536__ $$0G:(DE-HGF)POF4-631$$a631 - Matter – Dynamics, Mechanisms and Control (POF4-631)$$cPOF4-631$$fPOF IV$$x0
000348992 588__ $$aDataset connected to DataCite
000348992 650_7 $$2Other$$aParametrische Fluoreszenz
000348992 650_7 $$2Other$$aPhoton
000348992 650_7 $$2Other$$a530
000348992 693__ $$0EXP:(DE-Ds200)no_experiment-20200803$$1EXP:(DE-Ds200)theory-20200803$$5EXP:(DE-Ds200)no_experiment-20200803$$atheory$$eno experiment theory work (theory)$$x0
000348992 773__ $$a10.22032/DBT.59567
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000348992 9101_ $$0I:(DE-Ds200)Ext-HIJ$$6P:(DE-HGF)0$$aExternal Helmholtz Institute: HIJ$$b0$$kHIJ
000348992 9131_ $$0G:(DE-HGF)POF4-631$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vMatter – Dynamics, Mechanisms and Control$$x0
000348992 9141_ $$y2023
000348992 920__ $$lyes
000348992 9201_ $$0I:(DE-Ds200)JTH-20220701OR465$$kJTH$$lHIJ / TH$$x0
000348992 980__ $$aphd
000348992 980__ $$aVDB
000348992 980__ $$aI:(DE-Ds200)JTH-20220701OR465
000348992 980__ $$aUNRESTRICTED