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Frontiers in Optics

Proposal for Generation of Hybrid Entangled States in Waveguide Using Polarization Convertor

Divya Bharadwaj, Krishnan Thyagarajan

Published Jan 1, 2016• 0 citations
Publisher

Abstract

In this paper we describe a scheme for generation of hybrid spatial modal–polarization entangled photon pairs using type-II spontaneous parametric down conversion process and the electro optic effect in a domain engineered KTP channel waveguide.
DOI
10.1364/fio.2016.jw4a.3

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Generation of entangled photon pairs at telecom wavelength has been garnering a growing interest in the context of quantum communications and quantum computing. Several generation techniques have been proposed, including spontaneous Four-Wave Mixing in resonators or Spontaneous Parametric Down Conversion (SPDC) in Periodically Polled Lithium Niobate (PPLN) waveguides. Large photon pair efficiencies have been demonstrated in particular in PPLN on insulator [3]. However, polarization entangled photon pair generation (Type II phase matching configuration) suffers from a less favourable non-linear coefficient and optical mode birefringence in PPLN.