Broadband biphoton generation and polarization splitting in a monolithic
AlGaAs chip
- URL: http://arxiv.org/abs/2208.14108v2
- Date: Mon, 8 May 2023 07:53:54 GMT
- Title: Broadband biphoton generation and polarization splitting in a monolithic
AlGaAs chip
- Authors: F\'elicien Appas, Othmane Meskine, Aristide Lema\^itre, Jos\'e Palomo,
Florent Baboux, Maria I. Amanti, Sara Ducci
- Abstract summary: On-chip generation and handling of polarized photon pairs is a central challenge for the development of quantum photonics circuits.
Here, we demonstrate a monolithic AlGaAs chip including the generation of broadband orthogonally polarized photon pairs and their polarization splitting.
The quality of the two-photon interference at the chip output is assessed via a Hong-Ou-Mandel experiment displaying a visibility of 75.5 % over the same bandwidth.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The ability to combine various advanced functionalities on a single chip is a
key issue for both classical and quantum photonic-based technologies. On-chip
generation and handling of orthogonally polarized photon pairs, one of the most
used resource in quantum information protocols, is a central challenge for the
development of scalable quantum photonics circuits; in particular, the
management of spectrally broadband biphoton states, an asset attracting a
growing attention for its capability to convey large-scale quantum information
in a single spatial mode, is missing. Here, we demonstrate a monolithic AlGaAs
chip including the generation of broadband orthogonally polarized photon pairs
and their polarization splitting; 85% of the pairs are deterministically
separated by the chip over a 60 nm bandwidth. The quality of the two-photon
interference at the chip output is assessed via a Hong-Ou-Mandel experiment
displaying a visibility of 75.5 % over the same bandwidth. These results,
obtained at room temperature and telecom wavelength, in a platform combining
high second-order nonlinearity, electro-optic effect and direct bandgap,
confirm the validity of our approach and represent a significant step towards
miniaturized and easy-to-handle photonic devices working in the broadband
regime for quantum information processing.
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