Post Doc In Nonlinear And Quantum Optical Metasurfaces

9 Nov 2023

Job Information

Organisation/Company

Université Paris Cité

Department

Recruitment service

Research Field

Physics » Quantum mechanics

Researcher Profile

First Stage Researcher (R1)

Country

France

Application Deadline

1 Feb 2024 - 15:15 (Europe/Paris)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

37,5

Offer Starting Date

1 Dec 2023

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

Metasurfaces composed of dielectric nanoresonators with subwavelength thickness allow for strong control over the properties of light in transmission and reflection. In the last years, this control has been extended to classical parametric processes like sum-frequency generation, with the engineering of polarization and directionality of the generated light and the enhancement of the nonlinear conversion efficiency. These properties make nonlinear metasurfaces promising also for quantum technologies, especially for creating very thin, yet efficient and highly tailorable sources of photon pairs. This perspective is encouraged by recent observations of photon-pair spontaneous parametric generation in nonlinear metasurfaces.

This research project is built on the synergic collaboration of our group in Paris and the Friedrich-Schiller-Universität in Jena. Based on our pioneer experimental demonstration of two-photon quantum states G. Marino et al., Optica (2019) and our very recent theoretical work on a quasinormal-mode approach to describe their generation M.A. Weissflog et al., arXiv:2305.19362, our joint efforts with the German partner aim to demonstrate ultrathin quantum state synthesizers allowing to tune all properties of photonic states by control of size, shape, orientation and spatial distribution of the nanoresonators. To reach this breakthrough, we can count on key competitive advantage in both the technological platform (monolithic AlGaAs-on-AlOx, hybrid AlGaAs-on-sapphire) and the theoretical domain (quasi-normal-mode nonlinear modelling), besides our state-of-the-art nonlinear and quantum optics experimental facilities, and our international leadership in this research domain.

Our goal is to control frequency conversion processes to establish new and sophisticated ultra-broadband ultrafast quantum light sources, from visible to mid-infrared. In contrast to bulk natural materials or thin-films, metasurfaces are amenable to having their optical properties tailored to a specific task and thus may become the most versatile source of entangled photon pairs available. Allowing to engineer space, frequency, and polarization entanglement, our metasurfaces design will be suitable for a wide range of applications, with an especially high potential impact on quantum imaging and holography.

Requirements

Research Field

Physics » Quantum mechanics

Education Level

PhD or equivalent

Skills/Qualifications

Nonlinear and/or quantum optics, with a taste for experimental optics or nanofabrication

Additional Information

Website for additional job details

https: // emploi.u-paris.fr/chercher-une-offre?posteReference=ES00002682-10111

Work Location(s)

Number of offers available

2

Company/Institute

Université Paris Cité

Country

France

Geofield

Where to apply

Website

https: // emploi.u-paris.fr/chercher-une-offre?posteReference=ES00002682-10111

Contact

City

PARIS

Website

https: // u-paris.fr/recrutement/

Street

85 boulevard Saint-Germain

Postal Code

75006

E-Mail

[email protected]

STATUS: EXPIRED