Abbreviated Journal Title

Phys. Rev. A

Keywords

Light Polarisation; Optical Frequency Conversion; Optical Waveguides; Quantum Entanglement; Quantum Optics; Two-Photon Processes; Optical Coherence Tomography; 2nd-Harmonic Generation; Phase; Photons; Downconversion; Momentum; Pairs; Optics; Physics; Atomic; Molecular & Chemical

Abstract

We examine the modal, spectral, and polarization entanglement properties of photon pairs generated in a nonlinear periodically poled two-mode waveguide (one-dimensional planar or two-dimensional circular) via nondegenerate spontaneous parametric down-conversion. Any of the possible degrees of freedom-mode number, frequency, or polarization-can be used to distinguish the down-converted photons while the others serve as attributes of entanglement. Distinguishing the down-converted photons based on their mode numbers enables us to efficiently generate spectral or polarization entanglement that is either narrowband or broadband. On the other hand, when the generated photons are distinguished by their frequencies in a type-0 process, modal entanglement turns out to be an efficient alternative to polarization entanglement. Moreover, modal entanglement in type-II down-conversion may be used to generate a doubly entangled state in frequency and polarization.

Journal Title

Physical Review A

Volume

79

Issue/Number

5

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

10

WOS Identifier

WOS:000266500900212

ISSN

1050-2947

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