Nonlinear optical processes are an essential tool in modern optics, with a broad spectrum of applications, including signal processing, frequency conversion, spectroscopy and quantum optics. Ordinary parametric devices nevertheless still suffer from relatively low gains and wide spectral emission. Here we demonstrate a unique configuration for phase-matching multiple nonlinear processes in a monolithic 2D nonlinear photonic crystal, resulting in the coherent parametric emission of four signal and idler modes, featuring an exponential gain enhancement equal to the Golden Ratio. The results indicate a new route towards compact high-brightness and coherent sources for multi-photon generation, manipulation and entanglement, overcoming limitations of conventional parametric devices.

Golden Ratio Gain Enhancement in Coherently Coupled Parametric Processes

Jedrkiewicz, Ottavia;Gatti, Alessandra;Brambilla, Enrico;Tamošauskas, Gintaras;
2018-01-01

Abstract

Nonlinear optical processes are an essential tool in modern optics, with a broad spectrum of applications, including signal processing, frequency conversion, spectroscopy and quantum optics. Ordinary parametric devices nevertheless still suffer from relatively low gains and wide spectral emission. Here we demonstrate a unique configuration for phase-matching multiple nonlinear processes in a monolithic 2D nonlinear photonic crystal, resulting in the coherent parametric emission of four signal and idler modes, featuring an exponential gain enhancement equal to the Golden Ratio. The results indicate a new route towards compact high-brightness and coherent sources for multi-photon generation, manipulation and entanglement, overcoming limitations of conventional parametric devices.
2018
www.nature.com/srep/index.html
Nonlinear Optics, parametric down-conversion, quantum entanglement
Jedrkiewicz, Ottavia; Gatti, Alessandra; Brambilla, Enrico; Levenius, Martin; Tamošauskas, Gintaras; Gallo, Katia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2074908
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