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Proceedings Paper

From SHG to mid-infrared SPDC generation in strained silicon waveguides
Author(s): Claudio Castellan; Alessandro Trenti; Mattia Mancinelli; Alessandro Marchesini; Mher Ghulinyan; Georg Pucker; Lorenzo Pavesi
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Paper Abstract

The centrosymmetric crystalline structure of Silicon inhibits second order nonlinear optical processes in this material. We report here that, by breaking the silicon symmetry with a stressing silicon nitride over-layer, Second Harmonic Generation (SHG) is obtained in suitably designed waveguides where multi-modal phase-matching is achieved. The modeling of the generated signal provides an effective strain-induced second order nonlinear coefficient of χ(2) = (0.30 ± 0.02) pm/V. Our work opens also interesting perspectives on the reverse process, the Spontaneous Parametric Down Conversion (SPDC), through which it is possible to generate mid-infrared entangled photon pairs.

Paper Details

Date Published: 29 August 2017
PDF: 6 pages
Proc. SPIE 10358, Quantum Photonic Devices, 1035804 (29 August 2017); doi: 10.1117/12.2273641
Show Author Affiliations
Claudio Castellan, Univ. of Trento (Italy)
Alessandro Trenti, Univ. of Trento (Italy)
Mattia Mancinelli, Univ. of Trento (Italy)
SM Optics s.r.l. (Italy)
Alessandro Marchesini, Univ. of Trento (Italy)
Mher Ghulinyan, Fondazione Bruno Kessler (Italy)
Georg Pucker, Fondazione Bruno Kessler (Italy)
Lorenzo Pavesi, Univ. of Trento (Italy)


Published in SPIE Proceedings Vol. 10358:
Quantum Photonic Devices
Cesare Soci; Mario Agio; Kartik Srinivasan, Editor(s)

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