Shaping the joint spectrum of down-converted photons through optimized custom poling
Abstract
We present a scheme for engineering the joint spectrum of photon pairs created via spontaneous parametric down-conversion. Our method relies on customizing the poling configuration of a quasi-phase-matched crystal. We use simulated annealing to find an optimized poling configuration which allows almost arbitrary shaping of the crystal's phase-matching function. This has direct application in the creation of pure single photons—currently one of the most important goals of single-photon quantum optics. We describe the general algorithm and provide code, written in C++, that outputs an optimized poling configuration given specific experimental parameters.
- Publication:
-
Physical Review A
- Pub Date:
- January 2016
- DOI:
- 10.1103/PhysRevA.93.013801
- arXiv:
- arXiv:1410.7714
- Bibcode:
- 2016PhRvA..93a3801D
- Keywords:
-
- Quantum Physics
- E-Print:
- Manuscript rewritten for clarity. Submission updated to match published version. C++ code is supplied in the ancillary files to this submission and can also be obtained from http://www.agatabranczyk.com/Dosseva2015code.zip