DIRECT OBSERVATION OF ORBITAL ANGULAR MOMENTUM CONSERVATION IN COLLINEAR TYPE-I SPDC

dc.contributorROBERTO RAMIREZ ALARCON
dc.creatorCarlos Andres Sevilla Gutierrez
dc.date2018-11
dc.date.accessioned2023-07-21T15:15:22Z
dc.date.available2023-07-21T15:15:22Z
dc.identifierhttp://cio.repositorioinstitucional.mx/jspui/handle/1002/882
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7725655
dc.description"We implement a direct measurement of the spatial modes distribution generated in a collinear type I spontaneous parametric down-conversion (SPDC) process using a triggered intensified CCD camera. This type of experiments have been realized previously. However in those cases the measurement was an indirect one, where both photons were collected into one-pixel detectors. In this thesis, to the best or our knowledge, it is the first time that a direct two dimensional measurement of the spatial modes distribution is made. These are well described by Laguerre-Gaussian modes. In our experiments we could observe up to mode l=+/-10. By exploiting the capabilities of an ICCD camera, it is possible to visualize the orbital angular momentum (OAM) conservation of the unprocessed SPDC bi-photon state. This is performed by observing the diffraction pattern by a triangular aperture. We show the results using this method for modes l=+/-1,+/-2. This conservation of OAM leads to entanglement in OAM, since one photon carries the anti-correlated topological charge with respect to the other one. Therefore, they are conditioned to the state of the other photon."
dc.formatapplication/pdf
dc.languageeng
dc.relationcitation:Sevilla Gutiérrez, (2018). "Direct observation of orbital angular momentum conservation in collinear Type-I SPDC". Maestría en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 55 pp.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Autor/OAM
dc.subjectinfo:eu-repo/classification/Autor/Conservation
dc.subjectinfo:eu-repo/classification/Autor/SPDC
dc.subjectinfo:eu-repo/classification/Autor/Laguerre-Gauss
dc.subjectinfo:eu-repo/classification/Autor/Quantum
dc.subjectinfo:eu-repo/classification/Autor/Entanglement
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/22
dc.subjectinfo:eu-repo/classification/cti/2212
dc.subjectinfo:eu-repo/classification/cti/221212
dc.subjectinfo:eu-repo/classification/cti/221212
dc.titleDIRECT OBSERVATION OF ORBITAL ANGULAR MOMENTUM CONSERVATION IN COLLINEAR TYPE-I SPDC
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageLeón, Guanajuato
dc.audiencegeneralPublic


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