Spectrally multimode integrated SU(1,1) interferometer

A. Ferreri, M. Santandrea, M. Stefszky, K.H. Luo, H. Herrmann, C. Silberhorn, P.R. Sharapova, Quantum (2021).

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Journal Article | Published | English
<jats:p>Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.</jats:p>
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Ferreri A, Santandrea M, Stefszky M, et al. Spectrally multimode integrated SU(1,1) interferometer. Quantum. Published online 2021. doi:10.22331/q-2021-05-27-461
Ferreri, A., Santandrea, M., Stefszky, M., Luo, K. H., Herrmann, H., Silberhorn, C., & Sharapova, P. R. (2021). Spectrally multimode integrated SU(1,1) interferometer. Quantum, Article 461. https://doi.org/10.22331/q-2021-05-27-461
@article{Ferreri_Santandrea_Stefszky_Luo_Herrmann_Silberhorn_Sharapova_2021, title={Spectrally multimode integrated SU(1,1) interferometer}, DOI={10.22331/q-2021-05-27-461}, number={461}, journal={Quantum}, author={Ferreri, Alessandro and Santandrea, Matteo and Stefszky, Michael and Luo, Kai Hong and Herrmann, Harald and Silberhorn, Christine and Sharapova, Polina R.}, year={2021} }
Ferreri, Alessandro, Matteo Santandrea, Michael Stefszky, Kai Hong Luo, Harald Herrmann, Christine Silberhorn, and Polina R. Sharapova. “Spectrally Multimode Integrated SU(1,1) Interferometer.” Quantum, 2021. https://doi.org/10.22331/q-2021-05-27-461.
A. Ferreri et al., “Spectrally multimode integrated SU(1,1) interferometer,” Quantum, Art. no. 461, 2021, doi: 10.22331/q-2021-05-27-461.
Ferreri, Alessandro, et al. “Spectrally Multimode Integrated SU(1,1) Interferometer.” Quantum, 461, 2021, doi:10.22331/q-2021-05-27-461.


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