Assembling a Spontaneous Parametric Down Conversion Source
Document Type
Poster
Campus where you would like to present
Ellensburg
Event Website
https://digitalcommons.cwu.edu/source
Start Date
18-5-2020
Abstract
Spontaneous parametric down-conversion (SPDC) is a process in which a nonlinear crystal is used to convert an incident photon into a pair of photons. This pair of SPDC photons conserve the energy and momentum of the incident photon and is a quantum entangled state. We assembled an optical apparatus that was designed to produce SPDC photons from a beta barium borate crystal. We used a computational program to model the propagation directions of the SPDC photons. Collimators coupled to photon detetctors were positioned according to the model and then we made small adjustments to the positions until high count rates were measured. We established futher evidence that SPDC photons were being detected by a coincidence measurement between the photon detectors. These findings suggest that this apparatus can be used in the future to perform additional experiments on non-degenerate downconverted photons, quantum entangled state, anti-bunching experiments, and experiments involving Bell’s Inequality.
Recommended Citation
Pritchard, Eric and Mattes, Martin, "Assembling a Spontaneous Parametric Down Conversion Source" (2020). Symposium Of University Research and Creative Expression (SOURCE). 92.
https://digitalcommons.cwu.edu/source/2020/COTS/92
Department/Program
Physics
Additional Mentoring Department
https://cwu.studentopportunitycenter.com/2020/04/assembling-a-spontaneous-parametric-down-conversion-source/
Assembling a Spontaneous Parametric Down Conversion Source
Ellensburg
Spontaneous parametric down-conversion (SPDC) is a process in which a nonlinear crystal is used to convert an incident photon into a pair of photons. This pair of SPDC photons conserve the energy and momentum of the incident photon and is a quantum entangled state. We assembled an optical apparatus that was designed to produce SPDC photons from a beta barium borate crystal. We used a computational program to model the propagation directions of the SPDC photons. Collimators coupled to photon detetctors were positioned according to the model and then we made small adjustments to the positions until high count rates were measured. We established futher evidence that SPDC photons were being detected by a coincidence measurement between the photon detectors. These findings suggest that this apparatus can be used in the future to perform additional experiments on non-degenerate downconverted photons, quantum entangled state, anti-bunching experiments, and experiments involving Bell’s Inequality.
https://digitalcommons.cwu.edu/source/2020/COTS/92
Faculty Mentor(s)
Michael Braunstein