Highly efficient source for frequency-entangled photon pairs generated in a 3 super(rd)-order periodically poled MgO-doped stoichiometric LiTaO sub(3) crystal

We present a highly efficient source for discrete frequency-entangled photon pairs based on spontaneous parametric down-conversion using 3rd-order type-0 quasi-phase matching in a periodically poled MgO-doped stoichiometric LiTaO sub(3) crystal pumped by a 355.66-nm laser. Correlated two-photon stat...

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Bibliographic Details
Published in:Optics letters 2015-07, Vol.40 (13), p.3061-3064
Main Authors: Kim, Heonoh, Lee, Hee Jung, Lee, Sang Min, Moon, Han Seb
Format: Article
Language:English
Subjects:
Correlation
Crystals
Filtering
Filtration
Interference fringes
Lasers
Photons
Spectra
Online Access:Get full text
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Summary:We present a highly efficient source for discrete frequency-entangled photon pairs based on spontaneous parametric down-conversion using 3rd-order type-0 quasi-phase matching in a periodically poled MgO-doped stoichiometric LiTaO sub(3) crystal pumped by a 355.66-nm laser. Correlated two-photon states were generated with automatic conservation of energy and momentum in two given spatial modes. These states have a wide spectral range, even under small variations in crystal temperature, which consequently results in higher discreteness. Frequency entanglement was confirmed by measuring two-photon quantum interference fringes without any spectral filtering.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.003061