Investigate quantum defects in 2D materials with ultrafast optical coherent microscopy

Organisation/Company

Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)

Research Field

Physics

Researcher Profile

Recognised Researcher (R2)
Leading Researcher (R4)
First Stage Researcher (R1)
Established Researcher (R3)

Country

France

Application Deadline

24 Mar 2024 – 22:00 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Offer Starting Date

1 Sep 2024

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

Scientific context. Quantum emitters in two-dimensional (2D) semiconductors layered materials are growing rapidly as one of the most promising building-blocks for next generation quantum technologies [1,2,3]. Additionally such qbits systems are of great interest for fundamental quantum optics experiments. Indeed, these optically active defects or confined exciton inherit exceptional properties from their 2D hosts, which exhibit a high mechanical flexibility, easy integration into photonic chips, and capacity to be stacked with other 2D materials (2DM) to form innovative device architectures.

PhD project. In the team, important progress has been made on one hand concerning the processing and identification of radiative defects in hexagonal Boron Nitride [6], and on the other hand, in the development of a cutting-edge experiment that combines optical microscopy and ultrafast non-linear coherent spectroscopy (see fig.). The latter allows to optically probe and manipulate quantum superpositions of states at the single-system level with spatial (~ 500 nm) and temporal resolution (100 fs) [4,5]. In this context, we are looking for a motivated student to investigate the light-matter interaction mediated between radiative defects or confined excitons in 2D hosts, coupled to photonic nanostructures, in order to tailor their optical properties. The PhD project comprises multiples aspect. 1) Synthesis of new-generation 2D materials. 2) Static characterization of quantum emitters using micro-photoluminescence spectroscopy, ranging from cryogenic to room temperature. 3) Study of the quantum properties using state-of-the-art time-resolved experiment mentioned above. 4) Understanding and modelling of the mechanisms of decoherence of confined excitonic systems surrounded by photonic and 2D crystalline environments.

Funding opportunity. This research proposal is among the priority PhD subjects at the doctoral school 182 of Strasbourg. Other source of PhD funding, based on PI’s grants, can be also envisaged.

[1] I. Aharonovich, ; Toth, M. Quantum Emitters in Two Dimensions. Science 358 (6360), 170–171 ( 2017 ).

[2] A.Kubanek. Coherent Quantum Emitters in Hexagonal Boron Nitride. Adv Quantum Tech 5 (9), 2200009 ( 2022),

[3] Vasconcellos, et al Single‐Photon Emitters in Layered Van Der Waals Materials. Physica Status Solidi (b) (2022 ).

[4] F. Fras et al Multi-wave coherent control of a solid-state single emitter. Nature Photonics 10, 155–158 (2016).

[5] D. Wigger et al. Exploring coherence of individual excitons in InAs quantum dots. Ph ys. Rev. B 96, 165311 (2017)

[6] M. Islam et al Large-Scale Statistical Analysis of Defect Emission in hBN: Revealing Spectral Families and Influence of Flakes Morphology. http://arxiv.org/abs/2309.15023 (2023) .

Funding category: Contrat doctoral

PHD Country: France

Requirements
Specific Requirements

Master's degree in physics or related field, obtained or in the process of obtaining,

Additional Information
Work Location(s)

Number of offers available

1

Company/Institute

Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)

Country

France

City

strasbourg

Geofield

Where to apply

Website

https://www.abg.asso.fr/fr/candidatOffres/show/id_offre/121225

STATUS: EXPIRED