Offres de stage M2

Capteurs photoniques à base de polymères pour la détection de COV : Caractérisations optiques par holographie et mise en forme de faisceaux

For the past decades, environmental pollution, caused mainly by anthropogenic and industrial activities and leading to the actual climate change, has been recognized as a crucial and major public health issue. Among lots of species, Volatile Organic Compounds (VOC) represent a major class of pollutants.

Contact: Lydie FERRIER

Moiré patterns in twisted bilayer of photonic crystals
Moiré patterns arise when two periodic patterns are overlaid with a relative twist angle. Very recently, Moiré patterns have been studied in twisted bilayer of graphene, revealing that the electronic band structure can be strongly modified: a small relative twist between the layers induces insulating and superconducting states[1,2], states that are completely absent in a single sheet of graphene.
Contact: Lydie FERRIER

Points exceptionnels dans des nanostructures photoniques

For the past few years, exceptional points in photonic structures have attracted a lot of interest since it reveals the non-hermiticity of photonic systems1 and thus pushed nanophotonics into the exciting field of topology of non hermitian systems. Exceptional points are spectral singularities where both the real and imaginary part of the complex frequency of eigenmodes and the corresponding wavevector coalesce giving rise to exotic light behavior.
Contact: Lydie FERRIER

Design and Characterization of Single Photon Avalanche Diode (SPAD)
Single-Photon Avalanche Diodes (SPAD) have been widely studied and successfully implemented for the detection of weak optical signals in the visible and near-infrared spectrum range (NIR). They are able of capturing individual photons with typically sub-nanosecond timing resolution, which make them suitable for a wide area of application such as low light detection, time of flight measurements and more recently in secured or quantum communications.

Contact : Francis CALMON

Hybrid Multiferroic Nanostructures (0D/2D) underExternal Stimuli
Controlling nanomagnetism by means of an electric field is a key issue for the future development of low-power spintronic devices. In this project, we propose to tune in real time the magnetic reversal assisted by electric field of well-defined nanoparticles prepared by Low Energy Clusters beam Deposition (LECBD) at the PLYRA [1] platform.
In this context, the CsCl-like B2 chemically ordered FeRh alloy, which presents a metamagnetic transition from a low temperature antiferromagnetic order to a high temperature ferromagnetic order just above room temperature, is a very good candidate for assessing magnetic control through external stimuli [2, 3].

Contact: Ingrid CANERO INFANTE

Photonique intégrée nonlinéaire proche et moyen infra-rouge
Malgré son potentiel reconnu, les technologies MIR restent encore limitées dans leurs éventails d’applications, et ce en grande partie a cause de l’encombrement des dispositifs MIRs (les composants optiques opérant dans cette gamme de longueur d’onde ont longtemps été restreints à des composants discrets opérant en espace libre, et à de simples guides passifs, généralement à base de fibres multimodes en chalcogénure) et des coûts prohibitifs des instruments utilisés dus au manque de dispositifs optiques MIR compacts.
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